Self-Compensation of Astigmatism in Mode-Cleaners for Advanced Interferometers

被引：3

作者：

Barriga, P. ^{[1
]}

Zhao, Chunnong ^{[1
]}

Ju, Li ^{[1
]}

Blair, David G. ^{[1
]}

机构：

[1] Univ Western Australia, Sch Phys, Crawley, WA 6009, Australia

来源：

SIXTH EDOARDO AMALDI CONFERENCE ON GRAVITATIONAL WAVES | 2006年 / 32卷

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1088/1742-6596/32/1/070

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using a conventional mode-cleaner with the output beam taken through a diagonal mirror it is impossible to achieve a non-astigmatic output. The geometrical astigmatism of triangular mode-cleaners for gravitational wave detectors can be self-compensated by thermally induced astigmatism in the mirrors substrates. We present results from finite element modelling of the temperature distribution of the suspended mode-cleaner mirrors and the associated beam profiles. We use these results to demonstrate and present a self-compensated mode-cleaner design. We show that the total astigmatism of the output beam can be reduced to 5 x 10(-3) for +/- 10% variation of input power about a nominal value when using the end mirror of the cavity as output coupler.

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页数：7

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