Design and experimental demonstration of a laser modulation system for future gravitational-wave detectors
Design and experimental demonstration of a laser modulation system for future gravitational-wave detectors
复制标题
用于未来引力波探测器的激光调制系统的设计和实验演示
DOI：
10.1088/1361-6382/ab4489
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发表时间：
2019
影响因子：
3.5
通讯作者：
Kajita Takaaki
中科院分区：
文献类型：
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作者：
Yamamoto Kohei;Kokeyama Keiko;Michimura Yuta;Enomoto Yutaro;Nakano Masayuki;Ge Gui-Guo;Uehara Tomoyuki;Somiya Kentaro;Izumi Kiwamu;Miyakawa Osamu;Yamamoto Takahiro;Yokozawa Takaaki;Fujikawa Yuta;Fujii Nobuyuki;Kajita Takaaki
将信号回收腔长度与腔共振失调可以显着改善超出标准量子极限的量子噪声，而目前还没有公里级引力波（GW）探测器成功实现该技术。已知失谐技术会引入很大的过量噪声，并且这种噪声可以通过具有串联的两个马赫-曾德尔干涉仪的激光调制系统来减小。该调制系统，称为马赫-曾德尔调制器（MZM），还通过引入在主干涉仪的任何部分中非谐振的第三调制场，使GW检测器的控制更加鲁棒。另一方面，马赫-曾德尔干涉仪的镜位移引起耦合到GW信号端口的新型噪声源。在本文中，位移噪声要求的MZM的推导，也是我们的原理验证实验的结果报告。
Detuning the signal-recycling cavity length from a cavity resonance significantly improves the quantum noise beyond the standard quantum limit, while there is no km-scale gravitational-wave (GW) detector successfully implemented the technique. The detuning technique is known to introduce great excess noise, and such noise can be reduced by a laser modulation system with two Mach–Zehnder interferometers in series. This modulation system, termed Mach–Zehnder modulator (MZM), also makes the control of the GW detector more robust by introducing the third modulation field which is non-resonant in any part of the main interferometer. On the other hand, mirror displacements of the Mach–Zehnder interferometers arise a new kind of noise source coupled to the GW signal port. In this paper, the displacement noise requirement of the MZM is derived, and also results of our proof-of-principle experiment is reported.