[17a-M_110-1~13] 3.4 Laser system and materials

9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)

[17a-M_110-2] Investigation of Water Impurities in CsLiB₆O₁₀ crystal by Raman Depth Profiling

〇(B)Kota Ikawa¹, Kyosuke Shimda², Kaho Yamamoto¹, Tomoaki Nambu¹, Ryota Murai³, Yoshinori Takahashi³, Yusuke Mori^2,3, Masashi Yoshimura^1,3 (1.ILE, Osaka Univ., 2.Grad. Sch. of Eng., Osaka Univ., 3.SOSHO CHOKO Inc.)

Keywords:

nonlinear optical crystal,Raman spectroscopy,CLBO crystal

CsLiB₆O₁₀ (CLBO) is a nonlinear optical crystal used for generating high-power deep ultraviolet lasers. It is operated at 150℃ to counter deliquescence and remove internal water impurities. Previous studies observed that heating a CLBO crystal to 150℃ after reabsorption of water impurities causes a rapid decrease in deep ultraviolet output, followed by gradual recovery. To elucidate the mechanism of this phenomenon, the behavior of water impurities during the reabsorption and heating dehydration processes within the CLBO element was investigated using Raman spectroscopy, focusing on the OH stretching vibration.