Mu Henglin, Xu Xin, Le Taoran, Tan Yidong, Wei Haoyun, Li Yan
Appl Opt. 2024 Feb 1;63(4):1032-1038. doi: 10.1364/AO.511022.
Transponder-type laser interferometry is essential in spaceborne gravitational wave detection missions. This paper presents a transponder-type laser interferometer prototype for potential noise calibration of spaceborne gravitational wave detectors. Using a digital optical phase-locked loop, we successfully locked the phase of the slave laser to the master laser (∼200 ). Once the link between the master laser and the slave laser is established, the two satellites (essentially two lasers) form a transponder-type laser interferometer. We carefully analyze the measurement stability and noise characteristics of the interferometer, and the results show that the Allan deviation of the zero drift can reach 243.2 pm at =0.429, while the noise spectral density has a typical 1/ line shape with a floor of 21 / at 1 Hz. The coherence analysis shows that the temperature drift is an important factor limiting the performance of the interferometer below 2 mHz, while the frequency noise of the master laser is not dominant in the experiment. Transponder-type laser interferometers have a wide range of applications in intersatellite communication and measurement. Our design can serve as a valuable reference for gravitational wave detection missions such as LISA.
应答器型激光干涉测量法在星载引力波探测任务中至关重要。本文介绍了一种用于星载引力波探测器潜在噪声校准的应答器型激光干涉仪原型。利用数字光学锁相环，我们成功地将从激光器的相位锁定到主激光器（约200 ）。一旦主激光器和从激光器之间的链路建立起来，两颗卫星（本质上是两台激光器）就形成了一个应答器型激光干涉仪。我们仔细分析了干涉仪的测量稳定性和噪声特性，结果表明，在 =0.429时，零漂移的阿伦偏差可达243.2皮米，而噪声谱密度具有典型的1/ 线形，在1赫兹时本底为21 / 。相干分析表明，温度漂移是限制干涉仪在2毫赫兹以下性能的一个重要因素，而在实验中主激光器的频率噪声并不占主导地位。应答器型激光干涉仪在卫星间通信和测量中有广泛的应用。我们的设计可为诸如丽莎计划等引力波探测任务提供有价值的参考。
