Single Frequency Lasers

SPZ Series Single Frequency Fiber Lasers

Product Range (Laser power vs laser wavelength)

KEY TECHNOLOGIES

• High power narrow linewidth fiber amplifier

With excellent SBS and relative intensity noise suppression technology, fiber amplifier with up to 120 W power, excellent relative intensity noise and wide wavelength range covering (1010-2051nm) could be achieved.

• Ultra-narrow linewidth DFB fiber laser

A distributed feedback fiber grating is written on a gain fiber to generate single frequency laser with ultra-narrow linewidth. The excellent long-term stability of the seed laser without mode hopping is achieved by utilizing unique packaging technology.

• Frequency conversion with high power and efficiency

High efficiency frequency converted laser extend the wavelength coverage of fiber lasers to visible, ultra violet and even Mid-IR. The stable single pass frequency conversion and high power resonant frequency conversion make fiber laser based single frequency laser more suitable for various industrial application

• High performance pulsed fiber laser

With knowledge in nonlinear fiber optics, highly reliable ultrafast fiber lasers are developed. With high speed electrical technology, stable nanosecond laser at IR, visible and UV could be supplied.

TYPICAL APPLICATIONS

• Ultra-Narrow linewidth fiber DFB laser: seed source for high power laser, beam combination, laser radar etc.

• High power single frequency fiber laser: optical lattice, quantum precision measurement, atom cooling etc.

• High efficiency frequency conversion laser: narrow linewidth visible light for quantum application, ultraviolet laser for semiconductor inspection, Mid-IR laser for gas sensing etc.

• High performance pulsed fiber laser: ultrafast laser precision machining, optical imaging, seed frequency comb, THz etc.

We have single frequency seed fiber lasers, amplified lasers, frequency-converted lasers and specified lasers to be described as follows.

1. SPZ Series Seed Lasers

1.1 Distributed Feedback Single Frequency Fiber Laser

Low-Linewidth, Low-Noise, No Mode-Hopping, Wavelength Tunable, Linear-Polarization

Single-frequency fiber laser has the greatest advantage of high-purity single-frequency laser outputting with narrow-linewidth. Single-frequency fiber laser offered by us uses the technology of distributed feedback to generate linearly polarized single frequency laser in an all-fiber structure. The single-frequency operation is stable and efficient by adopting unique side frequency suppression technology. A special assembly structure is also used to isolate the impact of external environmental vibration and temperature changes, thereby effectively improving the long-term stability on frequency and narrowing the linewidth. Also in this way, the laser mode will never be hopped. At present, the average output power is greater than 10 mW, 40 mW and 10 mW at the band of 1 μm, 1.5 μm and 2 μm, respectively. The output wavelength is flexible and the linewidth is always less than 20 kHz. The wavelength thermal tuning range is as high as 0.8 nm and the fast frequency tuning range can reach 3-5 GHz. The laser also has good power stability (RMS<0.5% @3 hrs) and excellent beam quality (M2 <1.05). Therefore, the single frequency fiber laser offered by us is the best choice for cold atom physics, high power laser system, sensing and lidar applications.

Distributed Feedback Fiber Laser:

Features:

• Excellent shock resistance and high and low temperature resistance

• Low Linewidth (<20 kHz), <3KHz is optional

• Never mode hopping, large tuning range without mode hopping

• Narrow linewidth (<20 kHz), <3 kHz is optional

Applications:

• Cold Atom Physics

• Precision Measurement

• Spectral Beam Combining

• Coherent Communication

(1) Yb doped Single Frequency Fiber Laser

Ultra-narrow linewidth, low noise, no mode hopping, tunable, linear polarization

Remark: wavelength can be customized

(2) Er doped Single Frequency Fiber Laser

Ultra-narrow linewidth, low noise, no mode hopping, tunable, linear polarization

Remark: wavelength can be customized

(3) Tm doped Single Frequency Fiber Laser

Ultra-narrow linewidth, low noise, no mode hopping, tunable, linear polarization

Remark: wavelength can be customized

1.2 Fixed External Cavity Diode Laser

Ultranarrow linewidth, Low intensity noise, No mode hopping, Tunable

Compared with the traditional external cavity diode laser, FECL (fixed external cavity diode laser) has no movable elements in the structure. Thus it is able to work under heavy environment temperature variation and vibration, still free of mode-hop. Adopting optical communication diode laser packaging technology, we developed FECL in a tiny butterfly-package. Meanwhile with the low-noise and high modulation-bandwidth driver, We FECL shows ultra-narrow linewidth (< 10 kHz), ultralow intensity noise (<-150 dBc/Hz @100 kHz), and large modulation bandwidth (> 5MHz). FECL is widely used in aeras like transportable atomic clock, and gravity meter, optical lattice, radar, coherent optical communication, high-precision optical sensing, quantum metrology.

Remark: wavelength can be customized

1.3 Ultrafast Laser

(1) Ultra-stable Picosecond Fiber Laser

Industrial grade ultra fast laser seed source excellent solution

The ultra-stable picosecond fiber laser offered by us is an excellent seed source for industrial-grade ultrafast laser applications. It has the advantages of fiber lasers: small size, no need for thermal management, and good beam quality. The central wavelength of the ultrafast fiber laser is 1064 nm and the repetition rate can be from 20 to 30 MHz. The temporal pulse width can be less than 10 ps and the spectral width is less than 0.5 nm. The maximum pulse energy can be up to 400 nJ. By utilizing a unique nonlinear technology to achieve mode locking, the ultrashort pulse not only has good long-term stability, but also can withstand 0-45 ℃ operating environment. The laser also has excellent performance on self-starting of mode-locking, which can achieve more than 100,000 consecutive self-starts, and most of the startup time is less than 2 s.

Key Features:

• Narrow pulse width, narrow spectrum (< 0.5 nm)

• Ultrafast imaging

• Excellent beam quality

• Linear polarization

• Good power stability, Applications

Applications:

• High power ultrafast laser seed source

• Super fast imaging

• Precision measurement

• Optical frequency comb

2. SPZ Series Single Frequency Fiber Amplifier

High Power, Single Frequency, Wide Wavelength Range

We dedicate to the research and development of precision fiber lasers for scientific research and emerging new areas. We offer the high power fiber amplifier for the low power and narrow linewidth seed laser amplification. There are 4 types amplifiers to cover the lasing wavelength from 976 to 2050nm.

• YFA-SF: Single frequency Ytterbium-doped fiber amplifier;

• EFA-SF: Single frequency Erbium-doped fiber amplifier;

• TFA-SF: Single frequency Thulium-doped fiber amplifier;

• RFA-SF: Single frequency Raman fiber amplifier;

With the unique SBS suppression, heat dissipation and ultrafast protection technology, our single frequency fiber laser is much more stable and compact than conventional lasers on today's market and is ideal for applications in optical lattice, optical traps, optical tweezers and so on.

Key Features:

• Low Intensity Noise Narrow Linewidth

• No Mode Hopping

• Good Beam Quality (M² <1.2)

• High Power (up to 130 W)

• Short & Long Term Stability of the Wavelength

Applications:

• Cold Atom Physics

• Spectral Beam Combining

• Precision Measurement

• Coherent Communication

List of Single Frequency Fiber Amplifiers:

• Ultra-Low Intensity Noise: With optimized low noise pump driver, our single frequency Yb-doped, Er-doped and Tm-doped fiber amplifier could have ultra-low intensity noise (<0.03%@10Hz-10MHz))

• Active Power Stability: With high precision PID controller, We could offer output power stability to be less than (rms)<0.3% without any impact of the relative intensity noise.

• Fast Seed Laser Protection: The amplifier could stop the pump laser in short time to keep the amplifier safe in case of dead seed.

• Long fiber pigtail: With special nonlinear effect suppression technology, the high power single frequency laser maintain excellent beam quality and high output power (up to 130W) .

Remark:

1. Users can choose to match the “Power stability” function, this function can ensure that the output power has a perfect power stability

2. Users can choose to match the "low noise" function, this function can ensure that the output laser has a very low RIN.

3. XX: The center wavelength; YY: The maximum output power; ZZ: The Working modes.

2.1 High Power Single Frequency 1064 nm Fiber Laser

Continuous, High Power, Ultra Low Rin, Narrow Linewidth, Tunable

We offer a high-power (up to 130 W), low intensity noise, narrow linewidth highly reliable fiber laser for the optical lattice application. It is a combination of an all-fiber Ytterbium amplifier and an ultra-narrow linewidth ECDL laser at 1064 nm. The intensity noise of the laser is < -140 dBc/Hz from 10 kHz to 10 MHz. The full protection system of the laser ensures long-term free of maintenance and long life time. The laser occupies only a The laser is compact and robust, which only occupies an area of 300*240 mm2.

Key Features:

• Low Intensity Noise (-140 dBc/Hz @100 kHz)

• Narrow Linewidth (<10 kHz)

• Good Beam quality (M² <1.2)

• High Power (up to 130 W)

• Operation in harsh conditions

• Compact Size

Applications:

• Pump laser for OPO

• Optical Lattice

• Optical Traps

• Optical Tweezers

• Fundamental laser for 532 nm laser

• Holography & Interferometry

• High Resolution Spectroscopy

Remark: XX: Central Wavelength; YY: Output Power; ZZ: Operation Mode

2.2 High Power Single Frequency Yb-doped Fiber Laser

Continuous, High Power, Ultra Low Rin, Narrow Linewidth, Tunable

We offer a 1010-1120 nm Ytterbium-doped fiber amplifier with innovative ASE suppression technology. Maximum output power reaches up to 130 W for a single-frequency operation. The lasers have ultra-low intensity noise, which makes them ideal light sources for the applications like optical lattice and laser atoms cooling. The full protection system of the laser ensures long-term free of maintenance and long-life time.

Key Features:

• Compact in size

• Excellent long time stability

• Good beam quality (M² <1.1)

• Operation in harsh conditions

Applications:

• Source for frequency doubling

• Mid-Infrared pump laser

• Neutron Source of Solid State Laser

• Biomedical research

Remark: XX: Central Wavelength; YY: Output Power; ZZ: Operation Mode

2.3 High Power Single Frequency Er-doped Fiber Laser

Continuous, High Power, Ultra Low Rin, Narrow Linewidth, Tunable

The erbium-doped single-frequency fiber amplifier can be divided into two versions according to different output power. The low-power version has a maximum output power of 15W with extremely low noise and RIN below -140 dBc/Hz (100 kHz). The high power version has a maximum output of 40W. It can be used for remote interferometry, coherent communication, and atomic physics after frequency doubling. The amplifier remains mode hopping- free and stable under wide temperature variation and high mechanical vibration, which is great for frequency locking. The fiber laser is an optimal solution for applications in outdoor harsh conditions.

Key Features:

• Narrow Linewidth (<1 kHz)

• Support Seed built-in, Tunable

• Extremely Low Intensity Noise (RIN -140 dBc/Hz @100 kHz)

• Excellent Beam Quantity (M² <1.1)

• Seed Power off Protection System

Applications:

• Optical Communication

• Laser Lidar

• Pump Laser for Frequency Doubling

• Interferometry

• Pump Laser for OPO

Remark: XX: Central Wavelength; YY: Output Power; ZZ: Operation Mode

2.4 Single frequency Tm-doped Fiber Laser

Continuous, High Power, Ultra Low Rin, Narrow Linewidth, Tunable

We offer 1700-2050 nm Tm-doped fiber amplifier with innovative ASE suppression technique. Maximum output power reaches up to 40 W for single-frequency operation. The lasers have ultra-low intensity noise (RIN<0.05%, 10Hz-10MHz) and excellent beam quality (M² <1.15), which makes them ideal light sources for the applications like optical lattice, laser atom cooling and biomedical. The full protection system of the laser ensures long-term free of maintenance and long-life time.

Key Features:

• Narrow Linewidth

• Support Seed built-in, Tunable

• Low intensity noise

• Good beam quality (M² <1.2)

• Seed Power off Protection System

Applications:

• Pump Laser for frequency converteds

• Laser Lidar

• Biomedical

• Laser cooling of atoms

• Pump for mid-IR OPO

Remark: XX: Central Wavelength; YY: Output Power; ZZ: Operation Mode

2.5 Single Frequency Raman Fiber Laser

Stabilization, Compact, Excellent beam quality

We offer 1120-1700 nm Raman fiber amplifiers to overcome the limited emission spectral region of the rare-earth-doped fiber amplifiers. The maximum output power can reach up to 30 W for single-frequency operation. Meanwhile, the amplifier use all-polarization-maintaining design, which makes them compact in size and long term stable. They are designed for the applications like laser atomic cooling and laser spectroscopy etc.

Key Features:

• Narrow Linewidth

• Wide wavelength range

• Low intensity noise

• Good beam quality (M² <1.2)

• Seed Power off Protection System

Applications:

• Optical Communication

• Laser Lidar

• Interferometry

• Source for frequency doubling

• Pump Laser for OPO

Remark: XX: Central Wavelength; YY: Output Power; ZZ: Operation Mode

3. SPZ Series Single Frequency Converted Lasers

High Power, Low Noise, Narrow Linewidth, Without Mode-hop, Tunable, Linear Polarization

Narrow-linewidth continuous-wave (CW) lasers at visible or ultraviolet (UV) wavelengths have various important applications in the fields of atomic and molecular physics, measurement, communication, biology, etc. In the quantum simulation experiment, high-power 532nm lasers with ultra-low frequency noise can be operated as optical lattice trap, providing enough trap depth for ultra-cold atoms and improving the signal-to-noise ratio of atoms. Besides the visible lasers, high-power CW ultraviolet lasers have been widely needed in the experiments of laser cooling, clock frequency detection, ionization, etc. For example, the long-range interaction of Rydberg atoms has a great advantage in quantum information, Rb can be excited to Rydberg state by single-photon process with 297 nm. The logic ion 9Be+ should be cooled with 313 nm in quantum simulation, and could be used for cooperative cooling of 27Al+ in the optical clocks. In the lithographic process, 390 nm at watt level can obviously reduce the exposure time. We provide total solutions for the needs of wavelengths. The standard frequency converted schemes include single-passing second harmonic-generation (FL-SSHG), single-passing third-harmonic-generation (FLSTHG), single-passing sum-frequency-generation (FL-SSFG), single-passing difference-frequency-generation (FL-SDFG), second-harmonic-generation (FLRSHG) and forth-harmonic generation (FL-FHG) in resonant cavities. With these nonlinear-processes, we can almost achieve wavelength from 266 nm to 4000nm.

3.1 Single Pass SHG Fiber Laser

(1) Yb-Doped Single-Pass SHG Fiber Laser

Narrow Linewidth, Low Frequency Drift, Mode-hopping Free, Active power Stability, Excellent Beam Quality

We provide narrow-linewidth, mode-hopping free, frequency-doubled single frequency lasers from 488 to 560 nm, based on Yb-doped fiber lasers (YFLSSHG). It consists of an all-fiber amplifier seeded with single frequency fiber DFB laser, and a single-pass frequency doubling unit with PPLN/PPSLT crystal. Compared with frequency-doubled lasers based on diode laser, the fiber solution has a stable configuration, excellent beam quality (M² <1.1), high output power (up to 10 W) and low intensity noise (RIN<0.06% from 10 Hz-10 MHz). It remains mode-hopping-free and stable under wide temperature variation and high mechanical vibration.

Key Features:

• Narrow Linewidth (<20 kHz)

• Support Seed built-in, Tunable

• Stable and Maintenance-free

• Excellent Beam Quality

• Mode-Hopping Free

Applications:

• Laser cooling, trapping, Optical Lattice

• Pump laser for OPO, Ti:Saphire

• Biomedical

• Fundamental light for UV laser

Remark:

1. XX: Central Wavelength, YY: Maximum Output Power, ZZ: Operation Mode

2. The center wavelength can be customized

3. High power can be customized

(2) Er-Doped Single-Pass SHG Fiber Laser

Narrow Linewidth, Low Frequency Drift, Mode-hopping Free, Active Power Stability, Excellent Beam Quality

We provide narrow-linewidth, mode-hopping free, frequency doubled single frequency lasers from 765 to 798 nm, based on Er-doped fiber lasers (EFL-SSHG). It consists of an all-fiber amplifier seeded with single frequency fiber DFB laser, and a single-pass frequency doubling unit with PPLN/PPSLT crystal. Compared with frequency-doubled diode laser, the fiber solution has stable configuration, excellent beam quality (M² <1.1), high output power (up to 10 W) and low intensity noise (RIN<0.06% from 10 Hz-10 MHz). It remains mode-hopping-free and stable under wide temperature variation and high mechanical vibration.

Key Features:

• Narrow Linewidth (<20 kHz)

• Support Seed built-in, Tunable

• Stable and Maintenance-free

• Good Beam Quality (M² <1.1)

• Mode-Hopping Free

Applications:

• Rb atom cooling

• Magic optical lattice

• Atom interferometry

• Atom clock

Remark:

1. XX: Central Wavelength, YY: Maximum Output Power, ZZ: Operation Mode

2. The center wavelength can be customized

3. High power can be customized

(3) Tm-Doped Single-Pass SHG Fiber Laser

Narrow Linewidth, Low Frequency Drift, Mode-hopping Free, Active power Stability, Excellent Beam Quality

We provide narrow-linewidth, mode-hopping free, frequency doubled single frequency lasers near 1000nm, based on Tm-doped fiber lasers (TFL-SSHG). It consists of an all-fiber amplifier seeded with single frequency fiber DFB laser, and a single-pass frequency doubling unit with PPLN/PPSLT crystal. Compared with frequency-doubled diode laser, the fiber solution has stable configuration, excellent beam quality (M² <1.1). It remains mode-hopping-free and stable under wide temperature variation and high mechanical vibration.

Key Features:

• Narrow Linewidth (<20 kHz)

• Good Beam Quality (M² <1.1)

• Stable and Maintenance-free

• Mode-Hopping Free

Applications:

• Laser cooling, trapping, Optical Lattice

• Pump laser for OPO, Ti:Saphire

• Biomedical

• Solar cell processing

Remark:

1. XX: Central Wavelength, YY: Maximum Output Power, ZZ: Operation Mode

2. The center wavelength can be customized

3. High power can be customized

(4) Single-Pass SHG Raman Fiber Laser

Narrow Linewidth, Active power Stability, Excellent Beam Quality

We offer high power, narrow-linewidth, frequency doubled Raman fiber laser from 560 to 760 nm for applications like laser cooling of atoms. It consists of an all-fiber Raman amplifier seeded with ultra-narrow linewidth external cavity diode laser or fiber DFB laser, and a single-pass frequency doubling unit with periodically poled nonlinear crystal. Compared with frequency-doubled diode laser, the fiber solution has stable configuration, excellent beam quality (M² <1.2), high output power (up to 10 W). It remains mode-hopping-free and stable under wide temperature variation and high mechanical vibration and can be applied in the quantum technology, biomedicals and industry.

Key Features:

• Narrow Linewidth (<200 kHz)

• Support Seed built-in, Tunable

• Stable and Maintenance-free

• Good Beam Quality (M² <1.1)

Applications:

• Laser cooling of Li atoms

• Quantum simulation

• Biomedical

• Medical cosmetic

Remark:

1. XX: Central Wavelength, YY: Maximum Output Power, ZZ: Operation Mode

2. The center wavelength can be customized

3. High power can be customized

3.2 Single Pass THG Fiber Laser

Narrow Linewidth, Low Frequency Drift, Mode-hopping Free, Active Power Stability, Excellent Beam Quality

We offer high power, narrow-linewidth, frequency doubled Raman fiber laser from 355 to 464 nm for applications like laser cooling of ions and atoms. It consists of an all-fiber Yb-doped or Raman amplifiers seeded with ultranarrow linewidth fiber DFB laser or external cavity diode laser, and a single-pass frequency tripling unit with PPLN crystal. Compared with frequency-doubled diode laser, the fiber solution has stable configuration and excellent beam quality (M² <1.1). It can be applied in the quantum technology, biomedicals and industry.

Key Features:

• Narrow Linewidth, polalization

• Active Power Stability

• Stable and Maintenance-free

• Good Beam Quality (M² <1.1)

• No Mode-Hopping

Applications:

• Laser cooling, trapping

• Laser Spectroscopy

• Medicine and biophotonics

• Electromagnetically Induced

• Transparency (EITI)

Remark:

1. XX: Central Wavelength, YY: Maximum Output Power, ZZ: Operation Mode

2. The center wavelength can be customized

3. High power can be customized

Example: Detailed Specifications of SPZ-FL-SF-369-0.04-CW:

• Central wavelength: 368.7nm

• Output power (CW):>40mW

• Linewidth (100us integration time): <30 kHz

• Thermal tuning range: >0.2 nm

• PZT tuning range:>9GHz

• PZT tuning bandwidth: >10kHz

• Power tuning: 10%-100%

• Beam quality: M2<1.1

• PER: linear，>20dB

• Power stability: <1%(RMS@3hrs)

• Air cooling

• Dimensions: 442x420x133mm (controller) 475x90x70mm (laser head)

3.3 Single Pass SFG Fiber Laser

Narrow Linewidth, Low Frequency Drift, Mode-hopping Free, Active Power Stability, Excellent Beam Quality

We offer a single pass SFG fiber laser (FL-SSFG), which uses ultra-narrow linewidth fiber DFB laser as seeds, all fiber amplifiers to boost the output power and single pass PPLN SFG module to get high power 6xx nm laser output. The SFG fiber laser could cover the output wavelengths from 611 to 655 nm, with narrower linewidth (less than 10 kHz in 100 us integration time) and excellent beam quality (M² <1.1). It remains mode-hopping-free and stable under wide temperature variation and high mechanical vibration, which is great for frequency locking.

Key Features:

• Narrow Linewidth, tunable

• Active Power Stability

• Stable and Maintenance-free

• Good Beam Quality (M² <1.1)

• High power

Applications:

• Quantum simulation

• Quantum degenerate gas

• Laser Spectroscopy

• Gases detection

Remark:

1. XX: Central Wavelength, YY: Maximum Output Power, ZZ: Operation Mode

2. The center wavelength can be customized

3. High power can be customized

3.4 Single Pass DFG Fiber Laser

Narrow Linewidth, Low Frequency Drift, Mode-hopping Free, Active Power Stability, Excellent Beam Quality

We offer a single pass SDFG fiber laser (FL-SDFG), which uses ultranarrow linewidth fiber DFB laser as seeds, all fiber amplifiers to boost the output power and single pass PPLN DFG module to get high power mid-infrared laser output. The DFG fiber laser could cover the output wavelengths from 2400 to 4000 nm, with narrow linewidth (less than 200 kHz in 100 us integration time) and excellent beam quality (M² <1.1). It remains mode-hopping-free and stable under wide temperature variation and high mechanical vibration, which is great for frequency locking.

Key Features:

• Narrow Linewidth, tunable

• Active Power Stability

• Stable and Maintenance-free

• Good Beam Quality (M² <1.1)

• High output power

Applications:

• Sensing

• Laser Spectroscopy

• Gases detection

Remark:

1. XX: Central Wavelength, YY: Maximum Output Power, ZZ: Operation Mode

2. The center wavelength can be customized

3. High power can be customized

3.5 External Resonant SHG Fiber Laser

High Power, Narrow Linewidth, Low RIN, Mode-hopping Free, Active Power Stability, Excellent Beam Quality

We offer external resonant SHG fiber laser FL-RSHG, which uses ultra-narrow linewidth fiber DFB laser as seed, all fiber amplifiers to boost the output power and external resonant SHG cavity to get high power visible or UV lasers. The output laser wavelengths cover from 253 to 795 nm with a SHG efficiency of up to 80% and output power of up to 30W. The product has the properties of high output power, optional narrower linewidth (less than 20 kHz in 100us integration time), tunable and optional low relative intensity noise.

Key Features:

• Narrow Linewidth, tunable

• High output power

• Low intensity noise

• Good Beam Quality (M² <1.1)

Applications:

• Pump laser for Ti:Saphire

• Pump laser for OPO

• Optical Lattice

• Optical tweezer

We offer external resonant SHG fiber laser FA-RSHG-532, which uses ultra-narrow linewidth fiber DFB laser as seed, all fiber Yb-doped amplifier to boost the output power and external resonant SHG cavity to get high power, narrow linewidth, low intensity noise and high efficiency 532 nm laser. This laser has the characteristics of large output power, narrow linewidth (Lorentz linewidth <10 kHz), low intensity noise, and has been used in customers' optical lattice experiments.

Remark:

1: YY: Maximum Output Power, ZZ: Operation Mode

2: Power can be customized

3.6 Frequency quadrupled Fiber Ultraviolet Laser

We offer high power, single-frequency tunable UV lasers from 250 to 400 nm, for applications in quantum sciences such as cold atoms, ultra-cold molecules, single-photon excitation of Rydberg atom and frequency standard. UVlaser is obtained by combining an all-fiber amplifier seeded with an ultra-narrow linewidth laser, a single-pass frequency-doubling unit with PPLN crystal and a cascaded enhancement resonant cavity. These lasers has the characteristics of narrow linewidth, linear polarization and tunable. After active power control, the output power RMS of the laser is less than 1.0% within 3 hours.

Key Features:

• Simple structure single pass frequency doubling

• High efficiency external cavity resonance frequency doubling

• High output power

• Low intensity noise

• Narrow linewidth

Applications:

• Single photon Rydberg excitation of Rubidium atom (297 nm)

• Beryllium ion cooling (313 nm)

• Grating writing (390 nm)

• Calcium ion optical clock (397 nm)

• Ytterbium atom cooling (399 nm)

The 1050nm and 1550nm lasers with narrow linewidth are used as seed sources respectively. After amplification by single frequency fiber, the two lasers generate 626 nm laser with narrow linewidth and high power utilizing the periodically polarized crystal SFG. By cascading an efficient external resonant cavity, the wavelength of the laser is converted to ultraviolet band at 313 nm. Compared with cascading two resonant cavities with diode laser and tapered amplifier, our product has more compact and stable structure, larger output power of laser.

Remark:

1. XX: Central Wavelength, YY: Maximum Output Power, ZZ: Operation Mode

2. The center wavelength can be customized

3. High power can be customized

4. 780nm Single Frequency Laser

Continuous, high power, low drift, narrow linewidth, tunable, linear polarization, stable environment

4.1 Er-doped Laser Amplifier (EFA)

When EFA amplifies the seed laser power, the increase of the frequency and intensity noise is kept in extreme low range. The linewidth is less than 10 Hz, and the intensity noise (RIN) is less than -140 dBc/ HZ@ 100 kHz. Compared to the scheme of directly power-amplified 780 nm diode laser, the scheme of utilizing Er-doped fiber amplifier (EFA) as 1560 nm laser amplifier adopted by us can get higher power. The maximum laser power outputted with stable and long lifetime by EFA can be up to 15 W. Due to all fiber structure, the EFA have excellent environmental stability.

4.2 Space output 780 nm single frequency laser SPZ-780-EFA-SSHG

To meet the demands of the atomic physics and quantum physics based on Rb atom, We have developed space output 780 nm laser with maximum power of 15W using frequency doubling technique. Due to Handling, low drift, anti-vibration and other excellent environmental adaptability, EFA-SSHG-780nm has been used in out laboratory experiments of Rb atom interferometer and has been frequency stabilized with saturated absorption spectrum for several months.

• Narrow linewidth<20 kHz (as low as 2 kHz)

• Optional low intensity noise (RIN <-130 dBc/Hz @ 100 kHz)

• High power(15W)

• Excellent beam quality (M² <1.1)

• Power stability (P-P<1% @25℃, <2% @15-35℃)

• Environmental stability (15-35℃, 0.5 Grms (0-200 Hz))

• Rb atom

• Magic light lattice

Remark:

1 Can be Costumed; Custom range 765-790 nm

2 Depending on the seed laser, the seed laser can be external

3 Low noise seed can be selected for low noise

4.3 Fiber output 780 nm single frequency laser SPZ-780-EFA-SSHG

To meet the demands of the atomic physics and quantum physics based on Rb atom, we have developed fiber output 780 nm laser with maximum power of 2W using waveguide frequency doubling technique. Due to Handling, low drift, anti-vibration and other excellent environmental adaptability, EFA-SSHG-780nm has been used in out laboratory experiments of Rb atom interferometer and has been frequency stabilized with saturated absorption spectrum for several months.

• Narrow linewidth<20 kHz (as low as 2 kHz)

• Optional low intensity noise (RIN <-130 dBc/Hz @ 100 kHz)

• High power(2W)

• Excellent beam quality (M² <1.1)

• Power stability (P-P<1% @25℃, <2% @15-35℃)

• Environmental stability (15-35℃, 0.5 Grms (0-200 Hz))

• Rb atom

Remark:

1 Can be Costumed; Custom range 765-790 nm

2 Depending on the seed laser, the seed laser can be external

3 Low noise seed can be selected for low noise

4.4 780 nm single frequency laser SPZ-780-EFA-SSHG

4.5 Dual fiber output single frequency laser at 780 nm, SPZ-780-EFA-SSHG-2

We develop the dual-channels single frequency fiber laser with the maximum output power up to 1W/2W for Gravimeter gradiometer based on Rb cold atom. The frequency difference between the two channels can be locked by beat frequency/ phase locking technique. The output ports of 1560/780 nm laser can be ordered, which provides high performance light source for gravimeter, quantum optics and so on. The seed laser, amplifier and frequency doubling module of dual-channel 1560 nm laser are integrated in a small air-cooling case. The whole machine has compact structure, stable and reliable performance, and can pass vibration and high-low temperature tests.

• Narrow linewidth<20 kHz (as low as 2 kHz)

• Optional low intensity noise (RIN <-130 dBc/Hz @ 100 kHz)

• High power(2W)

• Excellent beam quality (M² <1.1)

• Power stability (P-P<1% @25℃, <2% @15-35℃)

• Environmental stability (15-35℃, 0.5 Grms (0-200 Hz))

• Rb atom

• Magic light lattice

• Optical tweezer

Center frequency drift of 0℃ -50℃ is about 340 MHz, and the center frequency drift of 25℃ for 2 hours is about 40 MHz

The experiment of high and low temperature impact storage at -30℃ -70℃ showed that the laser normal operation after high and low temperature shock.

• RMS power stability under high and low temperature impact

When the ambient temperature changes from 0℃ -50℃ at interval of 10 ℃. Although the laser power will jump during the temperature change process the power will remain stable at each temperature.

The stability of the first channel at each temperature point in the high-low temperature test was measured. The power stability of the 2-hour RMS at the limiting temperature of 0℃ and 50℃ was better than 0.2%. The power stability of the second channel is also better than 0.2% (single temperature point, RMS)

• Frequency tuning test

The seed has a reserved frequency sweep interface, and the 780nm laser frequency sweep range is about 3.2GHz.

Selecting a reasonable frequency locking point and controlling an appropriate frequency difference and frequency shift between the two channels, a dualchannels.780 nm laser can provide all the lasers required for the experiment of rubidium atomic gravimeter. The product has good environmental adaptability and is an excellent choice for laser source of transportable atomic gravimeter.

4.6  780nm laser frequency locking module

Cold atom experiments with Rb need lasers with specific frequency and we launch different frequency locking schedules for 780nm laser. We built up an all-fiber-connected frequency locking module with an integrated optical system and other optical fiber devices. This module can offer stable SAS or MTS signal and together with our laser controller, frequency locking with good long-term stability is realized. The frequency difference between two lasers should keep to a constant value in some cold atom experiments. For 87Rb atom gravimeter, the frequency difference of cooling laser and repumping laser should be about 6.6GHz and for the two Raman lasers the value is 6.834GHz. We have launched a specialized laser controller for offset frequency locking in the range from 50MHz to 8GHz with beat frequency/phase locking technique.

(1) Integrated optical module

With integrated spatial frequency-locking module, we build an all-fiber-connected frequency locking module. This module gives a stable SAS or MTS signal at Rb D2 line and the spectrum can offer error signal for frequency locking of 780nm laser

Dimensions of integrated frequency-locking optical module

SAS and MTS signal from the integrated optical module

(2)  Multi-function laser controller

We offer a multi-function laser controller for frequency locking under different condition. The controller is integrated with modem, PID module and High-Voltage amplifier and it can work as error signal generator, PID servo and PZT driver at the same time. All functions are controlled by software with no physical button or knob. The controller can work in different mode under customized. Under internal-modulation mode laser is locked with SAS or AS while under external-modulation mode laser is locked with MTS or PDH technique.

Front panel of controller

(3)   SAS-Locking

Frequency locking with SAS is based on Lock-in amplifier. Take the SAS of 85Rb atom as example, the controller get SAS signal from integrated optical module and generate error signal with lock-in amplifier, the PID module in the controller will then lock the frequency of 780nm laser.

SAS and error signal in our software

We build two independent SAS-locking system for 780nm Laser and take a laser beating test with their 1560nm seed laser. This can show the stability of frequency locking.

(4)   MTS-Locking

Unlike SAS-locking, MTS-Locking is under extern-modulation mode and the spectrum signal getting from demodulation can directly serve as error signal. Also take the MTS of 85Rb atom as example, integrated optical module provide both SAS signal and modulated MTS signal to the controller. After demodulation, the MTS signal will be error signal for frequency locking while the SAS signal here will be a reference signal. Due to their different principles, locking point of MTS and SAS are not the same.

SAS (reference) signal and MTS (error) signal in our software

Take also the beating test with two independent MTS-locking module.

(5)   Beat phase/frequency locking module

Beat phase/frequency locking module is used for frequency locking of multi-lasers. We has launched a frequency control system for dual-channel 780nm laser device which serves as the laser source of 87Rb gravimeter and gradiometer. Frequency of channel1 is locked to the resonance peak with MTS-locking while channel2 is locked 6.834GHz offset from channel1 with beat phase locking. This dual-channel laser can offer almost all the laser that is needed for a 87Rb gravimeter.

  Error signal and output signal in our software

Beat phase/frequency locking is realized with our controller. A fast PD measures the beat signal between two lasers and the PFD module in our controller generates error signal with the beat signal and a reference signal, the laser frequency will then be locked by PID module.

The 3.4 GHz beat signal from two 1560nm lasers

For 87Rb atom gravimeter, frequency chirping or jumping of laser is needed. A typical example is the Raman lasers whose frequency need to change within 3 pulses to compensate the doppler effect. Our controller provides frequency jumping function with a switching time below 10 μs.

STC Series Single Frequency DPSS Lasers (Single Longitudinal Mode Lasers)

Applications

• Holography

• Raman spectrum

• Precision measurement

• Interference lithography

• Biomedical/fluorescence

• Atomic excitation/absorption

Features

• Spectral linewidth <0.00001 nm

Options

• Modulation repetition rate up to 1MHz

• Frequency stabilized laser optional

• Fiber coupled optional

List of STC Series Single Longitidunal Mode Lasers

Ordering Information: STC-MSL-xx-yy-zz-ss, where xx means series numbers such FN, III, R, FL etc, yy means wavelength in nm, zz means laser power in mW, ss means power stability.

1. STC-MSL-FN-360 Single Longitudinal Mode Laser

All solid state single longitudinal mode laser at 360nm has the features of ultra compact, long lifetime, low cost and easy operating, which is used in DNA sequencing, flow cytometry, cell sorting, optical instrument, spectrum analysis, interference, measurement, holography, physics experiment, etc.

Note: The laser head needs to be used on a heat sink with good heat dissipation.

2. STC-MSL-FN-457 Single Longitudinal Mode Laser

3. STC-MSL-RA-457 Single Longitudinal Mode Laser

4. STC-MSL-W-457 Single Longitudinal Mode Laser

5. STC-MSL-FN-473 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

6. STC-MSL-F-515 Single Longitudinal Mode Laser

7. STC-MSL-III-523.5 Single Longitudinal Mode Laser

8. STC-MSL-FN-523.5 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

9. STC-MSL-III-526.5 Single Longitudinal Mode Laser

10. STC-MSL-FN-526.5 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

11. STC-MSL-S-530 Single Longitudinal Mode Laser

12. STC-MSL-DS-530 Single Longitudinal Mode Laser

13. STC-MSL-III-532 Single Longitudinal Mode Laser

14. STC-MSL-S-532 Single Longitudinal Mode Laser

15. STC-MSL-DS-532 Single Longitudinal Mode Laser

16. STC-MSL-FN-532 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

17. STC-MSL-F-532 Single Longitudinal Mode Laser

18. STC-MSL-RA-532 Single Longitudinal Mode Laser

19. STC-MSL-R-532 Single Longitudinal Mode Laser

20. STC-MSL-AO-532 Single Longitudinal Mode Laser

21. STC-MSL-FN-543 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

22. STC-MSL-FN-556 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

23. STC-MSL-FN-561 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

24. STC-MSL-F-577 Single Longitudinal Mode Laser

25. STC-MSL-FN-588 Single Longitudinal Mode Laser

26. STC-MSL-F-589 Single Longitudinal Mode Laser

27. STC-MSL-RA-589 Single Longitudinal Mode Laser

28. STC-MSL-FN-607 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

29. STC-MSL-FN-639 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

30. STC-MSL-FN-656.5 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

31. STC-MSL-FN-660 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

32. STC-MSL-FN-671 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

33. STC-MSL-R-671 Single Longitudinal Mode Laser

34. STC-MSL-RA-671 Single Longitudinal Mode Laser

35. STC-MSL-W-671 Single Longitudinal Mode Laser

36. STC-MSL-FN-721 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

37. STC-MSL-FN-914 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

38. STC-MSL-FN-946 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

39. STC-MSL-FN-1030 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

40. STC-MSL-U-1047 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

41. STC-MSL-FN-1047 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

42. STC-MSL-FN-1053 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

43. STC-MSL-S-1064 Single Longitudinal Mode Laser

44. STC-MSL-III-1064 Single Longitudinal Mode Laser

45. STC-MSL-R-1064 Single Longitudinal Mode Laser

46. STC-MSL-AO-1064 Single Longitudinal Mode Laser

47. STC-FL-1064-SF Single Longitudinal Mode Laser

48. STC-MSL-FN-1112 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

49. STC-MSL-FN-1122 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

50. STC-MSL-FN-1313 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

51. STC-MSL-FN-1319 Single Longitudinal Mode Laser

Note: The laser head needs to be used on a heat sink with good heat dissipation.

52. STC-MSL-III-1342 Single Longitudinal Mode Laser

53. STC-MSL-R-1342 Single Longitudinal Mode Laser

54. STC-FL-1550-SF Single Longitudinal Mode Laser