Gray-tracking susceptibility in KTiOPO4 crystals

被引：1

作者：

Motokoshi, S ^{[1
]}

Jitsuno, T ^{[1
]}

Nakatsuka, M ^{[1
]}

Izawa, Y ^{[1
]}

机构：

[1] Inst Laser Technol, Nishi Ku, Osaka 5500004, Japan

来源：

ADVANCED HIGH-POWER LASERS | 2000年 / 3889卷

关键词：

KTiOPO4; crystal; gray-tracking; optical absorption coefficient; OH concentration; annealing;

D O I：

10.1117/12.380944

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The gray-tracking of KTiOPO4, nonlinear crystals, which is used for second harmonic generation of solid state lasers, have been investigated. The optical absorptions were measured and then the susceptibilities of gray-tracking were observed by measuring the reduction of transmittance of the crystal by irradiating of the laser pulses with the second harmonics of Nd:YAG laser. In addition, impurities in the crystals were analyzed. In comparison with the susceptibilities and the absorptions, the susceptibility of the gray-tracking of KTP crystals indicated a dependence on the initial absorption at 532-nm wavelength. Moreover, it is prevented with increasing OH concentration in the crystals. We propose a new approach toward the improvement of gray-tracking for KTP crystals using annealing process under control of the humidity.

引用

页码：644 / 650

页数：7

共 7 条

[1] STUDY OF KTIOPO4 GRAY-TRACKING AT 1064-NM, 32-NM, AND 355-NM [J].