Beam Splitter & Combiner

  • Update:Jun 13, 2017
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Beam splitters allow a beam to be split into two beams of differing power however the most popular power split is 50:50 at a 45° incidence angle.

Product Introduction

Beam Splitters

Beam splitters allow a beam to be split into two beams of differing power, however, the most popular power split is 50:50 at a 45° incidence angle. The polarization needs to be considered when specifying a beam splitter otherwise the reflected and transmitted beams will not have the correct power. We have developed a special 'polarization insensitive' coating which eliminates this problem for the 50:50 case.

• Advanced in-house design • Up to 500W/cm2 power handling • High quality laser grade material The following standard beam splitter are available.
Model Material Diameter mm ET mm Transmission % Reflectance % Coating
BS-10.6-10PIB3-45 ZnSe 25.4 3 50 50 AR/50%-PIB
BS-10.6-10ZPF3-50-P ZnSe 25.4 3 50 50 AR/50%-45P
BS-10.6-10ZPF3-50-R ZnSe 25.4 3 50 50 AR/50%-45R
BS-10.6-10ZPF3-50-S ZnSe 25.4 3 50 50 AR/50%-45S
BS-10.6-10ZPF4-99-R ZnSe 25.4 3 1 99 AR/99%-45R
BS-10.6-15PIB3-45 ZnSe 38.05 3 50 50 AR/50%-PIB
BS-10.6-15PIB4-45 ZnSe 38.05 4 50 50 AR/50%-PIB
BS-10.6-15ZPF3-10-R ZnSe 38.05 3 90 10 AR/10%-45R
BS-10.6-15ZPF3-1-R ZnSe 38.05 3 99 1 AR/1%-45R
BS-10.6-15ZPF3-50-P ZnSe 38.05 3 50 50 AR/50%-45P
BS-10.6-15ZPF3-50-R ZnSe 38.05 3 50 50 AR/50%-45R
BS-10.6-15ZPF3-50-S ZnSe 38.05 3 50 50 AR/50%-45S
BS-10.6-15ZPF3-5-R ZnSe 38.05 3 95 5 AR/5%-45R
BS-10.6-15ZPF4-50-R ZnSe 38.05 4 50 50 AR/50%-45R
BS-10.6-15ZPF5-50-R ZnSe 38.05 5 50 50 AR/50%-45R
BS-10.6-20PIB5-45 ZnSe 50.8 5 50 50 AR/50%-PIB

Remark:

1) The above items are flat/flat;

2) The angle of incidence is 45 degree;

3) The above items are polarisation-insensitive.

Model Number Diameter Thickness Reflectance Polarization
BS-10.6-BSZ-1012-50-P 1.000" 0.120" 50% ±3% P
BS-10.6-BSZ-1012-50-S 1.000" 0.120" 50% ±3% S
BS-10.6-BSZ-1012-50-U 1.000" 0.120" 50% ±3% U
BS-10.6-BSZ-1516-50-P 1.500" 0.160" 50% ±3% U
BS-10.6-BSZ-1516-50-S 1.500" 0.160" 50% ±3% S
BS-10.6-BSZ-1516-50-U 1.500" 0.160" 50% ±3% U
BS-10.6-BSZ-2020-50-P 2.000" 0.200" 50% ±3% P
BS-10.6-BSZ-2020-50-S 2.000" 0.200" 50% ±3% S
BS-10.6-BSZ-2020-50-U 2.000" 0.200" 50% ±3% U

Note: For "U" polarization: This is an unpolarized beam splitter. It is not a polarization-insensitive beam splitter.

Beam Combiner

1. Beam Combiner for CO2 Laser (wavelength 10.6um)

Average transmission > 99%@10.6um, Average reflection > 85%@650nm (or 633nm) Diameter Tolerance:+0/-0.13mm Thickness:±0.25mm Side1:T>99%@10.6um,45AOI Side2:T>99%@10.6um R>85%@650nm or 633nm 45AOI Flatness:λ/20 @10.6um

Part No. Material Diameter (inch) Thickness (mm) Remark
BCZ-0.5-2-650 ZnSe 0.5 2 MaxT10.6µm/MaxR650nm
BCZ-0.75-2-650 ZnSe 0.75 2 MaxT10.6µm/MaxR650nm
BCZ-1.0-3-650 ZnSe 1.0 3 MaxT10.6µm/MaxR650nm
BCZ-1.1-3-650 ZnSe 1.1 3 MaxT10.6µm/MaxR650nm
BCZ-1.5-3-650 ZnSe 1.5 3 MaxT10.6µm/MaxR650nm
BCZ-1-3-9.4-650 ZnSe 1.0 3 MaxT9.5µm/MaxR650nm
BCZ-20-2-650 ZnSe 20mm 2 MaxT10.6µm/MaxR650nm
BCZ-0.5-2-633 ZnSe 0.5 2 MaxT10.6µm/MaxR633nm
BCZ-0.75-2-633 ZnSe 0.75 2 MaxT10.6µm/MaxR633nm
BCZ-1-3-633 ZnSe 1 3 MaxT10.6µm/MaxR633nm
BCZ-1.5-3-633 ZnSe 1.5 3 MaxT10.6µm/MaxR633nm
Model Number Diameter Thickness Reflectance/Wavelength Wedge
BCZ-0508-AR 1.000" 0.120" 90% @ 0.633µm < 3 minutes
BCZ-0512-AR 1.000" 0.120" 90% @ 0.633µm < 3 minutes
BCZ-0708-AR 1.000" 0.120" 90% @ 0.633µm < 3 minutes
BCZ-0712-AR 1.500" 0.160" 90% @ 0.633µm < 3 minutes
BCZ-1012-AR 1.500" 0.160" 90% @ 0.633µm < 3 minutes
BCWZ-1012-AR 1.500" 0.160" 90% @ 0.633µm 12 minutes ±2 minutes
BCPZ-1012-AR 2.000" 0.200" 90% @ 0.633µm < 10 seconds
BCZ-1112-AR 2.000" 0.200" 90% @ 0.633µm < 3 minutes
BCZ-1512-AR 2.000" 0.200" 90% @ 0.633µm < 3 minutes
BCZ-2012-AR 2.000" 0.200" 90% @ 0.633µm < 3 minutes
BCZ-2520-AR 2.000" 0.200" 90% @ 0.633µm < 3 minutes
Note:

2. Beam Combiner for Nd:YAG Laser (wavelength 1064nm)

  Average transmission > 99%@1064nm, Average reflection > 85%@650nm Diameter Tolerance:+0/-0.13mm Thickness:±0.25mm Side1:T>99%@1064nm,45AOI Side2:T>99%@1064nm,R>85%@650nm,45AOI Flatness: λ/2 @1064nm per 25mm dia

Part No. Material Diameter (inch) Thickness (mm)
BCBK-0.5-2 BK7 0.5 2
BCBK-0.75-2 BK7 0.75 2
BCBK-0.75-3 BK7 0.75 3
BCBK-1.0-3 BK7 1.0 3
BCBK-1.0-3.4 BK7 1.0 3.4
BCBK-1.1-3 BK7 1.1 3
BCBK-1.5-3 BK7 1.5 3

We also provide beam combiner modules. Inside there is a beam combiner. A red diode is vertically fixed and the laser beam (such as 1064nm fiber laser) horizontally goes through the module. The model of the modules is described as follows:

Part number: STH-xxxx-yy

STH – red beam combiner

xxxx – laser wavelength

yy    -  laser beam diameter

Our standard beam combiner STH-1064-12 is designed for the use with the fiber lasers STR-P10, -P20 and –P30.  

3. Beam Combiner for Green Laser (532nm)

Diameter Tolerance:+0/-0.13mm

Thickness:±0.25mm

Side1:T>99%@532nm,45AOI

Side2:T>99%@532nm,R>85%@650nm,45AOI

Flatness: λ/2 @560nm per 25mm dia

Part No. Material Diameter (inch) Thickness (mm)
BCBK-1-3-532T650R BK7 1 3

4. Reverse Beam Combiner

Reverse YAG Beam Combiner refers to an optic component used to transmit a short wavelength beam (eg. 650nm) at an angle of incidence of 45º while reflecting a long wavelength 1064nm.

Diameter Tolerance:+0/-0.13mm

Thickness:±0.25mm

Side1:T>99%@650nm,45AOI

Side2:T>99%@650nm R>99%@1064nm,45AOI

Flatness: λ/2 @1064nm per 25mm dia

Part No. Material Diameter (inch) Thickness (mm)
BCBK-1-3.5-1064R BK7 1 3.5
BCBK-1-7-1064R BK7 1 7
BCBK-2-6.35-1064R BK7 2 6.35

Where, 

• α is angle of incidence

• n is index of refraction

• t is thickness

• d is displacement of the material

For example: BCZ-1-3, d=1mm; BCBK-1-3, d=0.8mm

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