Angular control of optical cavities in a radiation-pressure-dominated regime: the Enhanced LIGO case.
Angular control of optical cavities in a radiation-pressure-dominated regime: the Enhanced LIGO case.
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辐射压力主导状态下光学腔的角度控制：增强型 LIGO 案例。
DOI：
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发表时间：
2013
影响因子：
1.9
通讯作者：
N. Smith
中科院分区：
文献类型：
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作者：
K. Dooley;L. Barsotti;R. Adhikari;M. Evans;T. Fricke;P. Fritschel;V. Frolov;K. Kawabe;N. Smith
本文介绍了激光干涉引力波天文台（LIGO）4 km探测器的角度传感与控制（ASC）。增强型LIGO是第一代LIGO探测器的巅峰之作，在2009年至2010年期间运行，臂腔中的激光功率约为40千瓦。在这种情况下，辐射压力的影响是显着的，并诱导角光机械传递函数的不稳定性。在这里，我们提出并激励ASC设计在这种极端情况下，并提出其实施的结果增强LIGO。ASC性能的亮点是成功控制了光机扭转模式，相对镜面运动≤ 1×10（-7）rad rms，对带内应变灵敏度的影响有限。
We describe the angular sensing and control (ASC) of 4 km detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO). Enhanced LIGO, the culmination of the first generation LIGO detectors, operated between 2009 and 2010 with about 40 kW of laser power in the arm cavities. In this regime, radiation-pressure effects are significant and induce instabilities in the angular opto-mechanical transfer functions. Here we present and motivate the ASC design in this extreme case and present the results of its implementation in Enhanced LIGO. Highlights of the ASC performance are successful control of opto-mechanical torsional modes, relative mirror motions of ≤ 1×10(-7) rad rms, and limited impact on in-band strain sensitivity.