Broadband，Inc.,取扱製品光学素子

Undoped YAG is a new substrate and window material that can be used for both UV and IR optics. It is particularly useful for high temperature and high energy applications. YAG shows no trace absorption in the 2-3μm region where glasses tend to be highly absorbent due to the strong H₂O band. Sapphire is also slightly birefringent. The mechanical and chemical stability of YAG is similar to Sapphire, but YAG is not birefringent and is available with high optical homogeneity.

Based on the patented new growth technique of Temperature Gradient Technique (TGT), We have successfully produced large size of φ 45´ 150mm and high quality undoped YAG.

◆	Wide Transmission Range:
	Useful from 250nm to 5000nm No absorption in the 2-3μm
◆	Excellent Thermal and Opto-Mechanical Properties:
	High thermal conductivity, 10 times better than glasses Extremely hard and durable Non-birefringent Stable mechanical and chemical properties High bulk damage threshold High index of refraction, facilitating low aberration lens design

　

Specifications

Mohs hardness	8-8.5
Thermal expansion	6.9´ 10^{-6 ℃-1}
Thermal conductivity	13W× m^-1×K^-1
dn/dt	7.4´ 10^-6 ℃^-1
Diameter	10～120mm
Length	150mm
Wavefront distortion	<λ/2 per inch @ 1064nm

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