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Silicon Wedged Windows


  • 30 arcminute Wedge
  • Eliminate Etalon Effects and Prevent Cavity Feedback
  • Uncoated and AR-Coated Silicon Substrates
  • Custom Options Available

WW81050

Ø1", Uncoated

Back Reflections from Wedges Are not Collinear with the Incident Beam
(Drawing not to Scale)

WW80530-E1

Ø1/2", AR Coated for 2 - 5 µm

Related Items


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Wedged Window Selection Guide
Wavelength Range Substrate Material
150 nm - 5.0 µm Sapphire
180 nm - 8.0 µm Calcium Fluoride (CaF2)
185 nm - 2.1 μm UV Fused Silica
200 nm - 6.0 µm Magnesium Fluoride (MgF2)
200 nm - 11 µm Barium Fluoride (BaF2)
250 nm - 1.6 µm UV Fused Silica for 45° AOI
350 nm - 2.0 μm N-BK7
600 nm - 16 µm Zinc Selenide (ZnSe)
1.2 - 8.0 µm Silicon (Si)
2.0 - 16 µm Germanium (Ge)
V-Coated Wedged Windows
Optic Cleaning Tutorial  Optical Coatings Guide

Features

  • 30 arcmin Wedged Windows
  • Ø1/2" or Ø1" Silicon Windows Available
  • Available Uncoated (1.20 - 8.0 µm) or with -E1 Broadband AR Coating (2 - 5 µm)
  • Custom Sizes Available by Contacting Tech Support

Thorlabs offers uncoated Ø1/2" and Ø1" wedged silicon (Si) windows. These wedged optics eliminate fringe patterns and can be used to help avoid cavity feedback. Windows are useful for protecting a laser output from environmental effects and for beam sampling applications. These windows are available uncoated or with an AR coating for 2 - 5 µm. We also supply planar windows with a variety of substrate materials and coating options.

Silicon is an ideal optical material for applications using wavelengths in the near-IR range and parts of the mid-IR range. Silicon offers high thermal conductivity and low density, making it suitable for laser windows. These windows are fabricated using optical Czochralski silicon (OCz-Si) and therefore exhibit a strong absorption band at 9 µm and low transmission at THz frequencies. As a result, they are not suitable for use in CO2 laser transmission or terahertz applications. 

In addition to the silicon wedged windows offered here, Thorlabs also offers wedged windows with other substrate materials (see the selection guide to the right). Wedged Laser Windows with AR coatings centered around common lasing wavelengths and wedged Beam Samplers with broadband AR coatings on only one face are also available. Additionally, wedged windows with custom sizes and thicknesses are available; please contact Tech Support for more information.


Posted Comments:
j.travers  (posted 2017-08-04 16:42:16.427)
Can you provide 2" pieces, or at least 1.5"?
nbayconich  (posted 2017-08-07 04:49:01.0)
Thank you for contacting Thorlabs. I will contact you directly about our custom capabilities.
Window Selection Guide (Table Sorted by Wavelength)
Substrate and Window Type Wavelength Range Available AR Coatings Reflectance over AR Coating Rangea Transmission Data Reflectance Data
Sapphire:
Flat or Wedged
150 nm - 5.0 μm Uncoated -
Raw Data
-
 -D Coating, 1.65 - 3.0 µm Ravg < 1.0% at 0° AOI
Raw Data

Raw Data
 -E1 Coating, 2.0 - 5.0 µm Ravg < 1.50%, Rabs < 3.0% (per Surface, 2.0 - 5.0 µm);
Ravg < 1.75% (per Surface, 2.0 - 4.0 µm) at 0° AOI

Raw Data

Raw Data
Calcium Fluoride (CaF2):
Flat or Wedged
180 nm - 8.0 μm  Uncoated -
Raw Data
-
-D Coating, 1.65 - 3.0 µm Ravg < 1.0%; Rabs < 2.0% at 0° AOI
Raw Data

Raw Data
UV Fused Silica:
FlatWedgedV-Coated Flat, or
V-Coated Wedged
185 nm - 2.1 μm Uncoated
(Flat or Wedged)
-
Raw Data
-
-UV Coating, 245 - 400 nm
(Flat or Wedged)
Ravg < 0.5% at 0° AOI -
Raw Data
-C3 Coating, 261 - 266 nm
(V-Coated)
Ravg < 0.5% at 0° AOI - Click to View Index Plot
Raw Data
-C6 Coating, 350 - 450 nm
(V-Coated)
Ravg < 0.5% at 0° AOI - Click to View Index Plot
Raw Data
 -A Coating, 350 - 700 nm 
(Flat or Wedged)
Ravg < 0.5% at 0° AOI -
Raw Data
 -B Coating, 650 - 1050 nm 
(Flat or Wedged)
Ravg < 0.5% at 0° AOI -
Raw Data
 -C Coating, 1050 - 1700 nm 
(Flat or Wedged)
Ravg < 0.5% at 0° AOI -
Raw Data
Magnesium Fluoride (MgF2):
Flat or Wedged
200 nm - 6.0 μm Uncoated -
Raw Data
-
Barium Fluoride (BaF2):
Wedged 
(Flat BaF2 Windows
Available Below)
200 nm - 11 µm Uncoated -
Raw Data
-
-E1 Coating, 2 - 5 µm  Ravg < 1.25%; Rabs < 2.5%  at 0° AOI
Raw Data
Icon
Raw Data
UV Fused Silica, for 45° AOI:
Flat or Wedged
250 nm - 1.6 µm Coating for 
250 nm - 450 nm
Ravg < 1.0% at 45° AOI info
Raw Data
Coating for
350 nm - 1100 nm
Ravg < 2.0% at 45° AOI info
Raw Data
Coating for
400 nm - 700 nm
Ravg < 1.0% at 45° AOI info
Raw Data
Coating for
600 nm - 1700 nm
Ravg < 1.5% at 45° AOI info
Raw Data
Coating for
700 nm - 1100 nm
Ravg < 1.0% at 45° AOI info
Raw Data
Coating for
1200 nm - 1600 nm
Ravg < 1.0% at 45° AOI info
Raw Data
Infrasil®:
Flat
300 nm - 3 µm Uncoated -
Raw Data
 -
N-BK7:
FlatWedgedV-Coated Flat, or
V-Coated Wedged
350 nm - 2.0 μm Uncoated
(Flat or Wedged)
-
Raw Data
-
 -A Coating, 350 - 700 nm  
(Flat or Wedged)
Ravg < 0.5% at 0° AOI -
Raw Data
-C7 Coating, 400 - 700 nm
(V-Coated)
Ravg < 0.5% at 0° AOI - Click to View Index Plot
Raw Data
-C10 Coating, 523 - 532 nm (V-Coated) Ravg < 0.5% at 0° AOI - Click to View Index Plot
Raw Data
-C11 Coating, 610 - 860 nm 
(V-Coated)
Ravg < 0.5% at 0° AOI - Click to View Index Plot
Raw Data
-B Coating, 650 - 1050 nm 
(Flat or Wedged)
Ravg < 0.5% at 0° AOI -
Raw Data
-C13 Coating, 700 - 1100 nm 
(V-Coated)
Ravg < 0.5% at 0° AOI - Click to View Index Plot
Raw Data
C14 Coating, 1047 - 1064 nm
(V-Coated)
Ravg < 0.5% at 0° AOI - Click to View Index Plot
Raw Data
-C15 Coating, 523 - 532 nm
& 1047 - 1064 nm
(V-Coated) 
Ravg < 0.5% at 0° AOI - Click to View Index Plot
Raw Data
-C Coating, 1050 - 1700 nm 
(Flat or Wedged)
Ravg < 0.5% at 0° AOI -
Raw Data
Zinc Selenide (ZnSe):
Flat or Wedged
600 nm - 16 µm Uncoated -
Raw Data
-
-D Coating, 1.65 - 3.0 µm Ravg < 1.0%; Rabs < 2.0% at 0° AOI
Raw Data

Raw Data
-E4 Coating, 2 - 13 µm
(Only Flat)
Ravg < 3.5%; Rabs < 6% at 0° AOI
Raw Data

Raw Data
-E2 Coating, 4.5 - 7.5 µm
(Only Flat)
Ravg < 1.0%; Rabs < 2.0% at 0° AOI
Raw Data

Raw Data
-E3 Coating, 7 - 12 µm
(Only Wedged)
Ravg < 1.0%; Rabs < 2.0% at 0° AOI
Raw Data
Icon
Raw Data
-G Coating, 7 - 12 µm
(Only Flat)
Ravg < 1% at 0° AOI
Raw Data

Raw Data
Silicon (Si):
Flat or Wedged
1.2 - 8.0 μm Uncoated -
Raw Data
-
 -E1 Coating, 2 - 5 µm
(Only Wedged)
Ravg < 1.25%; Rabs < 2.5% at 0° AOI
Raw Data
Icon
Raw Data
-E Coating, 3 - 5 µm
(Only Flat)
Ravg < 2% at 0° AOI
Raw Data

Raw Data
Germanium (Ge):
Flat or Wedged
2.0 - 16 μm Uncoated -
Raw Data
-
-C9 Coating, 1.9 - 6 µm
(Only Flat)
Ravg < 2% at 0° AOI
Raw Data

Raw Data
-G Coating, 7 - 12 µm
(Only Flat)
Ravg < 1% at 0° AOI
Raw Data

Raw Data
-E3 Coating, 7 - 12 µm
(Only Wedged)
Ravg < 1.0%; Rabs < 2.0% at 0° AOI
Raw Data
Icon
Raw Data
Barium Fluoride (BaF2):
Flat 
(Wedged BaF2 Windows Available Above)
3 - 5 μm -E Coating, 3 - 5 µm Ravg < 2% at 0° AOI
Raw Data

Raw Data
  • Reflectance is given per surface and each window is coated on both sides.

Silicon Wedged Windows, Uncoated

Item # WW80530 WW81050
Wedge Angle 30 ± 10 arcmin
Diameter 1/2" (12.7 mm) 1" (25.4 mm)
Diameter Tolerance +0.0 / -0.2 mm
Thickness 3.0 mm 5.0 mm
Thickness Tolerance ±0.1 mm
Clear Aperture ≥Ø11.43 mm ≥Ø22.86 mm
Surface Flatnessa ≤λ/4 Over Central Ø5 mm
≤λ/2 Over Entire Clear Aperture
≤λ/4 Over Central Ø10 mm
≤λ/2 Over Entire Clear Aperture
Surface Quality 40-20 Scratch-Dig
Wavelength Range 1.2 - 8.0 µm (Uncoated)
Substrate Siliconb
Transmission Data
(Click for Graph)

Raw Data
  • Measured at 633 nm
  • Click Link for Detailed Specifications on the Substrate
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
WW80530 Support Documentation
WW80530Ø1/2" Wedged Silicon Window, Uncoated
$107.16
Today
WW81050 Support Documentation
WW81050Ø1" Wedged Silicon Window, Uncoated
$134.48
Today

Silicon Wedged Windows, AR Coating: 2 - 5 µm

Item # WW80530-E3 WW81050-E3
Wedge Angle 30 ± 10 arcmin
Diameter 1/2" (12.7 mm) 1" (25.4 mm)
Diameter Tolerance +0.0 / -0.2 mm
Thickness 3.0 mm 5.0 mm
Thickness Tolerance ±0.1 mm
Clear Aperture >Ø11.4 mm >Ø22.9 mm
Surface Flatnessa ≤λ/2 Over Central Ø5 mm
≤λ Over Entire Clear Aperture
≤λ/2 Over Central Ø10 mm
≤λ Over Entire Clear Aperture
Surface Quality 40-20 Scratch-Dig
AR Coating Range 2 µm - 5 µm (-E1 Coating)
Reflectance over AR Coating Rangeb Ravg < 1.25% (per Surface)
Rabs < 2.5% (per Surface)
Both Sides are Coated
Transmission over AR Coating Rangeb Tavg > 94%
Tabs > 92%
Reflectance Data
(Click for Graph)
Icon
Raw Data
Substrate Siliconc
Transmission Data
(Click for Graph)

Raw Data
  • Measured at 633 nm
  • For Normal Incidence
  • Click Link for Detailed Specifications on the Substrate
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
WW80530-E1 Support Documentation
WW80530-E1Customer Inspired! Ø1/2" Wedged Silicon Window, AR Coating: 2 - 5 µm
$144.20
Today
WW81050-E1 Support Documentation
WW81050-E1Customer Inspired! Ø1" Wedged Silicon Window, AR Coating: 2 - 5 µm
$169.95
Today
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