论文类型：期刊论文

第一作者：Yuan-Ze Jiang

通讯作者：Yu-Rong Liang

合写作者：Xue-Lin Jin,Hsien-Chi Yeh

发表刊物：Optics Express

收录刊物：SCI

学科门类：物理学

文献类型：J

卷号：29

期号：12

页面范围：18336~18350

关键字：intersatellite heterodyne interferometry, weak-light phase readout

DOI码：10.1364/OE.424968

发表时间：2021-05-27

摘要：A laser interferometer will be used in the spaceborne gravitational-wave detection missions to measure the inter-satellite optical pathlength variations. The phase readout system of the interferometer needs to be carefully designed and tested to accomplish a shot-noise-limited detection performance under the situation of pico-Watt level received lights. In this work, a scheme based on dual-tone acousto-optic diffraction is presented to verify the performance of the weak-light phase readout system. By optimizing the parameters of the photoreceiver and the local strong-light power, the signal-to-noise ratio of the beat-note signal is enhanced. Thanks to the scheme’s common-mode noise rejections for the laser frequency noise, and the optical-path noise, etc., the differential phase noise has achieved a performance of 2×10−4 rad/Hz1/2, which is dominated by the weak-light (∼13 pW) shot noise above the frequencies of 2 mHz.