Effects of cryogenic temperatures on the performance of CW VECSELs

被引：0

作者：

Morris, Oliver J. ^{[1
]}

Wilcox, Keith G. ^{[1
]}

Head, C. Robin ^{[1
]}

Turnbull, Andrew P. ^{[1
]}

Farrer, Ian ^{[2
]}

Beere, Harvey E. ^{[2
]}

Ritchie, David A. ^{[2
]}

Tropper, Anne C. ^{[1
]}

机构：

[1] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS (VECSELS) III | 2013年 / 8606卷

基金：

英国工程与自然科学研究理事会;

关键词：

Cryogenic; VECSEL; OPSL; semiconductor disk laser; optically pumped; OUTPUT POWER; LASERS;

D O I：

10.1117/12.2002368

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the effects of cryogenic temperatures on the performance of two CW VECSELs. Firstly we make use of a liquid nitrogen cooled copper cold finger cryostat to house an entire VECSEL device within the vacuum space and report a 3.3 fold reduction in lasing threshold and a 3.6 times increase in the slope efficiency when the gain chip is held at 133 K compared to 293 K. Secondly we show that a VECSEL utilising an unprocessed gain chip and pumped with constant pump-spot size, exhibits thermal rollover at twice the incident pump power when held at 20 K and compared to operation at 293 K. This enhanced performance will motivate the development of processed gain chips that are robust against thermal contraction.

引用

页数：6

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