Infrasil® (Optical Quartz) Windows

Uncoated Windows for 300 nm - 3 µm
1.0 mm Thick Windows
Ø1/2" and Ø1" Versions Available
Offer Enhanced Transmission Above 1 µm

UDP10

(Ø1")

UDP05

(Ø1/2")

Related Items

Precision Windows

Fixed Optic Mounts

Ultrafast Beamsplitters

Alignment Tools

Optics Handling

Lab Supplies

Please Wait

Overview
Feedback
Window Guide

Flat 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)
250 nm - 1.6 µm	UV Fused Silica, for 45° AOI
300 nm - 3 µm	Infrasil^®
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)
3 - 5 μm	Barium Fluoride (BaF₂)
V-Coated Laser Windows

Features

Ø1/2" and Ø1" Windows with 1.0 mm Thickness
Flat Transmission from 300 nm to 3 µm
Nearly Identical Material Properties to UV Fused Silica
Ideal for Dispersion Management in Ultrafast Applications

These 1.0 mm thick, uncoated windows are fabricated from Infrasil^®†, a type of optical quartz. Infrasil is a popular alternative to UV fused silica since the two materials have nearly identical mechanical and optical properties. Relative to UV fused silica, Infrasil offers increased internal transmission around 1380 nm, flat transmission from the UV to the mid-IR, and nearly identical dispersion. The plot above shows the total transmission of a sample window from 200 nm to 5 µm.

Please note that at 1.0 mm thick, these optics are significantly thinner than most windows, making them more delicate than their thicker counterparts. They are also too thin for standard setscrew-based optic mounts. In applications where one of these windows is being placed in an optic mount, it should be secured using a retaining ring, as is done in Fixed Optic Mounts.

Usage in Ultrafast Applications
When one of these windows is combined with our UFBS5050 Ultrafast Beamsplitter, the transmitted and reflected arms of the beamsplitter will have nearly equal group delay dispersion (GDD). For more details, please see the UFBS5050 beamsplitter's webpage.

†Infrasil is a registered trademark of Heraeus Quarzglas.

Posted Comments:

Abani Nayak (posted 2019-05-23 10:12:14.667)

I would like to have Rectangular shape of Infrasil instead of Circular. Can I get rectangular window of Infrasil with customized length, width or height?

YLohia (posted 2019-05-23 10:06:30.0)

Hello, thank you for contacting Thorlabs. We are reaching out to you directly to discuss the possibility of offering a custom option.

jarias (posted 2017-04-03 06:59:16.557)

Is it possible to get this window in 2 inches diameter and with AR coating for 1070 nm?

tfrisch (posted 2017-04-19 02:44:03.0)

Hello, thank you for contacting Thorlabs. I have contacted you directly concerning more details for a quote.

Window Selection Guide (Table Sorted by Wavelength)
Substrate and Window Type	Wavelength Range	Available AR Coatings	Reflectance over AR Coating Range^a	Transmission Data	Reflectance Data
Sapphire: Flat or Wedged	150 nm - 5.0 μm	Uncoated	-	Raw Data	-
		-D Coating, 1.65 - 3.0 µm	R_avg < 1.0% at 0° AOI	Raw Data	Raw Data
		-E1 Coating, 2.0 - 5.0 µm	R_avg< 1.50%, R_abs< 3.0% (per Surface, 2.0 - 5.0 µm); R_avg < 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	-
Calcium Fluoride (CaF₂): Flat or Wedged	180 nm - 8.0 μm	-D Coating, 1.65 - 3.0 µm	R_avg < 1.0%; R_abs < 2.0% at 0° AOI	Raw Data	Raw Data
UV Fused Silica: Flat, Wedged, V-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)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-C3 Coating, 261 - 266 nm (V-Coated)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-C6 Coating, 350 - 450 nm (V-Coated)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-A Coating, 350 - 700 nm (Flat or Wedged)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-B Coating, 650 - 1050 nm (Flat or Wedged)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-C Coating, 1050 - 1700 nm (Flat or Wedged)	R_avg < 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	-
	200 nm - 11 µm	-E1 Coating, 2 - 5 µm	R_avg < 1.25%; R_abs < 2.5% at 0° AOI	Raw Data	Raw Data
UV Fused Silica, for 45° AOI: Flat or Wedged	250 nm - 1.6 µm	Coating for 250 nm - 450 nm	R_avg < 1.0% at 45° AOI	Raw Data
		Coating for 350 nm - 1100 nm	R_avg < 2.0% at 45° AOI	Raw Data
		Coating for 400 nm - 700 nm	R_avg < 1.0% at 45° AOI	Raw Data
		Coating for 600 nm - 1700 nm	R_avg < 1.5% at 45° AOI	Raw Data
		Coating for 700 nm - 1100 nm	R_avg < 1.0% at 45° AOI	Raw Data
		Coating for 1200 nm - 1600 nm	R_avg < 1.0% at 45° AOI	Raw Data
Potassium Bromide (KBr): Flat	250 nm - 26 µm	Uncoated	-		-
Infrasil^®: Flat	300 nm - 3 µm	Uncoated	-	Raw Data	-
N-BK7: Flat, Wedged, V-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)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-C7 Coating, 400 - 700 nm (V-Coated)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-C10 Coating, 523 - 532 nm (V-Coated)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-C11 Coating, 610 - 860 nm (V-Coated)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-B Coating, 650 - 1050 nm (Flat or Wedged)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-C13 Coating, 700 - 1100 nm (V-Coated)	R_avg < 0.5% at 0° AOI	-	Raw Data
		C14 Coating, 1047 - 1064 nm (V-Coated)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-C15 Coating, 523 - 532 nm & 1047 - 1064 nm (V-Coated)	R_avg < 0.5% at 0° AOI	-	Raw Data
		-C Coating, 1050 - 1700 nm (Flat or Wedged)	R_avg < 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	R_avg < 1.0%; R_abs < 2.0% at 0° AOI	Raw Data	Raw Data
		-E4 Coating, 2 - 13 µm (Only Flat)	R_avg < 3.5%; R_abs < 6% at 0° AOI	Raw Data	Raw Data
		-E2 Coating, 4.5 - 7.5 µm (Only Flat)	R_avg < 1.0%; R_abs < 2.0% at 0° AOI	Raw Data	Raw Data
		-E3 Coating, 7 - 12 µm (Only Wedged)	R_avg < 1.0%; R_abs < 2.0% at 0° AOI	Raw Data	Raw Data
		-G Coating, 7 - 12 µm (Only Flat)	R_avg < 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)	R_avg < 1.25%; R_abs < 2.5% at 0° AOI	Raw Data	Raw Data
		-E Coating, 3 - 5 µm (Only Flat)	R_avg < 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)	R_avg < 2% at 0° AOI	Raw Data	Raw Data
		-G Coating, 7 - 12 µm (Only Flat)	R_avg < 1% at 0° AOI	Raw Data	Raw Data
		-E3 Coating, 7 - 12 µm (Only Wedged)	R_avg < 1.0%; R_abs < 2.0% at 0° AOI	Raw Data	Raw Data
Barium Fluoride (BaF₂): Flat (Wedged BaF₂ Windows Available Above)	3 - 5 μm	-E Coating, 3 - 5 µm	R_avg < 2% at 0° AOI	Raw Data	Raw Data

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