High-power polarizing beam-splitter cubes separate orthogonal polarization states through a coated internal interface. Optical contacting or diffusion bonding can eliminate epoxy from the beam path; cube and plate reference specifications are retained separately.
Properties, applications and specifications
Polarization components separate a beam into orthogonal polarization states for isolation or routing. Cube and plate designs address high power, broad bandwidth, low dispersion and high extinction. Ion beam sputtered and e-beam dielectric coating options include reference extinction ratios greater than 1000:1, transmitted wavefront error better than λ/8 and 10 – 5 surface quality.
Standard and laser quality polarizing cube beamsplitters available from the catalog use one of several contacting technologies: optical contacting, optical adhesive contacting, or diffusion bonding. All have antireflection coatings for maximum throughput.
Custom cube and plate polarizers can vary material, dimensions, coating wavelength and absorption. Angular tolerance and transmitted wavefront error affect beam quality. Designs may operate at the Brewster angle or at 45° incidence.
Capabilities
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Standard & Semi-custom
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Types
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Plate, cube, Brewster angle
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Materials
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N-BK7, UV-grade fused silica, N-SF2
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Dimensions
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12.7 to 50.8 mm
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Extinction Ratio
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100:1 to 1000:1
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Coatings
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Laser line polarizing
Broadband polarizing
High energy
Wavelengths from 248 to 1300 nm
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Quality
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Standard and laser quality
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Construction (cubes)
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Optical adhesive contacting
Chemically activated direct bonding
Optical contacting
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Cube Polarizer Manufacturing Capabilities
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Surface Tolerances
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Precision
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Laser Quality
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High Precision
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Surface quality (scratch - dig)
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20 - 10
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10 - 5
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5 - 1
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Surface roughness (Å, RMS)
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20
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5
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3
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Flat Irregularity,
(P-V @ 633 nm before coating) |
λ/4
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λ/10
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λ/20
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Dimensional Tolerances
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Standard
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Precision
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High Precision
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Length & width (mm)
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+0.000 / -0.250
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± 0.150
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+0.000 / -0.010
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Thickness (mm)
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+0.000 / -0.250
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± 0.150
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± 0.005
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Angular deviation
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< 3 arc min
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≤ 10 arc sec
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≤ 0.5 arc sec
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Clear Aperture
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≥ 85%
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≥ 90%
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≥ 95%
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Plate Polarizer Manufacturing Capabilities
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Surface Tolerances
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Precision
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Laser Quality
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High Precision
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Surface Quality
(scratch - dig) |
40 - 20
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10 - 5
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5 - 2
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Surface roughness (Å, RMS)
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20
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5
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1
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Surface Figure
(P-V @ 633 nm before coating) |
λ/2
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λ/10
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λ/25
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Dimensional Tolerances
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Commercial
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Precision
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High Precision
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Diameter (mm)
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+0.000 / -0.250
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+0.000 / -0.100
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+0.000 / -0.010
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Length & width (mm)
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± 0.050
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+0.000 / -0.125
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+0.000 / -0.010
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Thickness (mm)
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± 0.250
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± 0.100
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± 0.010
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Angular deviation
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< 5 arc min
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≤ 1 arc sec
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≤ 0.5 arc sec
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Centration (ETV, mm)
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0.05
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0.01
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0.005
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Clear Aperture
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≥ 85%
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≥ 90%
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≥ 95%
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Spherical Tolerances
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Commercial
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Precision
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High Precision
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Spherical irregularity (P-V
@ 633 nm before coating) |
λ/2
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λ/5
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λ/100
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Spherical radius (fringes)
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5
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3
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0.5
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Epoxy-free bonding and IBS coatings are reference options for high-power PBS cubes in fused silica (FS) and YAG. The stated laser-induced damage threshold is up to 10J/cm2 at 1064nm with 10ns pulses.
Specifications of High Power Polarization Beamsplitter Cube
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Part No.
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HPBS635-1064
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HPBS127-1064
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HPBS635-980
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HPBS127-980
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Wavelength
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1064 nm
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1064 nm
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980 nm
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980 nm
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Reflection
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>99.9%
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>99.9%
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>99.9%
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>99.9%
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Transmission
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>97%
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>97%
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>97%
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>97%
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Extinction Ratio,
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>1,000:1
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>1,000:1
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>1,000:1
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>1,000:1
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AR Coating
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<0.20% per surface
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<0.20% per surface
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<0.20% per surface
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<0.20% per surface
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Surface Flatness
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λ/10
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λ/10
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λ/10
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λ/10
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Wavefront Distortion
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λ/8 transmitted
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λ/8 transmitted
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λ/8 transmitted
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λ/8 transmitted
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Reflected Beam
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90°
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90°
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90°
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90°
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Scratch-Dig
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10-5
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10-5
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10-5
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10-5
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Beam Deviation
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< 5 arcmin
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< 3 arcmin
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< 3 arcmin
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< 3 arcmin
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