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In situ correction of mirror surface to reduce round-trip losses in Fabry-Perot cavities

机译:镜面原位校正,以减少法布里-珀罗腔中的往返损耗

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摘要

High-finesse resonant cavities play an important role in many metrology applications such as gravitational wave detectors. The performance of these cavities can be limited by round-trip losses (RTP) generated by light that is scattered by the mirror surface defects into higher-order modes that are close to resonance. In this paper we develop a detailed model of this effect and we study possible strategies to correct the mirror surface. We show that it is possible to restrict the correction to the combination of a reduced set of surface deformations that can be reproduced on the mirror using projected heating patterns. We show with an optical simulation that by acting on the cavity mirrors it is possible to reduce RTP to the large angle scattering limit. We also show that the optimal correction can be computed without any a priori knowledge of the mirror surface, but based only on measurements of the power stored inside the cavity, thus opening up the possibility of a simple implementation of the proposed algorithm.
机译:高精细的谐振腔在许多计量应用中(例如重力波检测器)起着重要作用。这些腔的性能可能受到往返反射损耗(RTP)的限制,该损耗是由镜面缺陷散射为接近共振的高阶模所产生的光产生的。在本文中,我们开发了这种效果的详细模型,并研究了校正镜面的可能策略。我们表明,可以将校正限制在减少的一组表面变形的组合上,该组合可以使用投影的加热图案在反射镜上再现。我们通过光学仿真表明,通过作用在腔镜上,可以将RTP减小到大角度散射极限。我们还表明,无需对镜面有任何先验知识即可计算最佳校正,而仅基于腔内存储的功率的测量结果,从而为提出的算法的简单实现开辟了可能性。

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  • 来源
    《Applied optics》 |2014年第7期|共7页
  • 作者

    G. Vajente;

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  • 正文语种 eng
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