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Barium Fluoride Wedged Windows


  • 30 arcminute Wedge
  • Eliminate Etalon Effects and Prevent Cavity Feedback
  • Uncoated and AR-Coated BaF2 Substrates
  • Custom Options Available

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

WW01050

Ø1" Uncoated

WW00530-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" and Ø1" Windows Available
  • Available Uncoated (200 nm - 11 µm) or with -E1 Broadband AR Coating (2 - 5 µm)
  • Custom Sizes Available by Contacting Tech Support

Thorlabs offers wedged Ø1/2" and Ø1" barium fluoride (BaF2). 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.

Barium fluoride's properties are similar to those of calcium fluoride, but it offers the benefit that it is more resistant to high-energy radiation. It is, however, less resistant to water damage. Pronounced degradation of the BaF2 substrate occurs at 500 °C when exposed to water, but it can be used in applications requiring exposure to temperatures up to 800 °C in dry environments. The crystal orientation for these windows is random.

Barium Fluoride Handling and Safety
When handling optics, one should always wear gloves. This is especially true when working with barium fluoride because it is a hazardous material. For your safety, please wear gloves whenever handling BaF2 and thoroughly wash your hands afterwards. Click here to download a pdf of the MSDS for BaF2.

In addition to the BaF2 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.


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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.

Barium Fluoride (BaF2) Wedged Windows, Uncoated

Item #WW00530WW01050
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/8 Over Central Ø5 mm
≤λ/4 Over Entire Clear Aperture
≤λ/8 Over Central Ø10 mm
≤λ/4 Over Entire Clear Aperture
Surface Quality 40-20 Scratch-Dig
Wavelength Range 200 nm - 11 µm (Uncoated)
Substrate Barium Fluorideb
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
WW00530 Support Documentation
WW00530Ø1/2" Wedged BaF2 Window, Uncoated
$122.28
Today
WW01050 Support Documentation
WW01050Ø1" Wedged BaF2 Window, Uncoated
$188.28
Today

Barium Fluoride (BaF2) Wedged Windows, AR Coating: 2 - 5 µm

Item # WW00530-E1 WW01050-E1
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/8 Over Central Ø5 mm
≤λ/4 Over Entire Clear Aperture
≤λ/8 Over Central Ø10 mm
≤λ/4 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 Barium Fluoridec
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
WW00530-E1 Support Documentation
WW00530-E1Customer Inspired! Ø1/2" Wedged BaF2 Window, AR Coating: 2 - 5 µm
$132.61
Today
WW01050-E1 Support Documentation
WW01050-E1Customer Inspired! Ø1" Wedged BaF2 Window, AR Coating: 2 - 5 µm
$212.18
Today
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