Indication for dominating surface absorption in crystalline silicon test masses at 1550 nm
Indication for dominating surface absorption in crystalline silicon test masses at 1550 nm
复制标题
1550 nm 晶体硅测试质量中主要表面吸收的指示
DOI:
10.1088/0264-9381/30/16/165001
复制
发表时间:
2013
影响因子:
3.5
通讯作者:
R. Schnabel
中科院分区:
文献类型:
--
作者:
A. Khalaidovski;J. Steinlechner;R. Schnabel
The sensitivity of future gravitational wave (GW) observatories will be limited by thermal noise in a wide frequency band. To reduce thermal noise, the European GW observatory Einstein GW Telescope (ET) is suggested to use crystalline silicon test masses at cryogenic temperature and a laser wavelength of 1550 nm. Here, we report a measurement of the optical loss in a prototype high-resistivity crystalline silicon test mass as a function of optical intensity at room temperature. The total loss from both the bulk crystal and the surfaces was determined in a joint measurement. The characterization window ranged from small intensities below 1 W cm− 2, as planned to be used in ET, up to 21 kW cm− 2. A nonlinear absorption was observed for intensities above a few kW cm− 2. In addition, we have observed an intensity-independent offset that possibly arises from absorption in the crystal surfaces. This absorption was estimated to α surf≈ 800 ppm/surface, which might be too high for a cryogenic operation of a fiber-suspended silicon test mass. Such an offset was not observed in other recent measurements that were insensitive to surface absorption. Finally, a set of further characterization measurements is proposed to clearly separate the contributions from the surfaces and the bulk crystal.
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DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
J. Steinlechner;C. Krüger;N. Lastzka;S. Steinlechner;A. Khalaidovski;R. Schnabel
通讯作者:
R. Schnabel
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
J. Steinlechner;A. Khalaidovski;R. Schnabel
通讯作者:
R. Schnabel
影响因子:
4
作者:
M. Keevers;M. Green
通讯作者:
M. Green
DOI:
--
发表时间:
1973
期刊:
影响因子:
--
作者:
R. Loveland;W. Spear;A. Al
通讯作者:
A. Al
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
J. Steinlechner
通讯作者:
J. Steinlechner