THERMAL BEAM DISTORTIONS IN END-PUMPED ND-YAG, ND-GSGG, AND ND-YLF RODS

被引：262

作者：

PFISTNER, C ^{[1
]}

WEBER, R ^{[1
]}

WEBER, HP ^{[1
]}

MERAZZI, S ^{[1
]}

GRUBER, R ^{[1
]}

机构：

[1] CSCS MANNO,CTR SVIZZERO CALCOLO SCI,CH-6928 MANNO,SWITZERLAND

来源：

IEEE JOURNAL OF QUANTUM ELECTRONICS | 1994年 / 30卷 / 07期

关键词：

D O I：

10.1109/3.299492

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The thermally induced beam distortions in end-pumped Nd:YAG, Nd:GSGG, and Nd:YLF rods were analyzed and the influence of edge- and face-cooling was investigated. The distributions of temperature, stress, and strain in the crystals were calculated by finite element analysis. Based on these data, the space-resolved changes of the refractive index were determined considering thermal dispersion, surface deformation, and strain-induced birefringence. The resulting optical path difference for one round-trip in the end-pumped rods was integrated numerically. For each rod, the induced thermal lens was determined over the extent of the pump spot radius. The calculations of the optical path difference were experimentally confirmed by investigations using a modified Twyman-Green interferometer with a polarized HeNe probe beam at 633 nm under lasing and nonlasing conditions.

引用

页码：1605 / 1615

页数：11

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