两台Optical-Fiber干涉仪对sub-mHz引力波的相关探测
Correlated Detection of sub-mHz Gravitational Waves by Two Optical-Fiber Interferometers
摘要：
报道了两个光纤引力波干涉探测器的测量结果。探测器设计非常小，便宜，易于建造和操作。使用两个探测器允许对设计原理进行各种测试，并展示了第一次从空间上相隔1.1公里的探测器同时探测到相关的引力波。探测到的引力波的频谱为亚mHz，应变谱指数a=-1.4 +/-0.1。除了描述波效应的特征外，探测器还根据2007年下半年收集的大约80天的数据显示了主要的地球自转效应和地球轨道效应。探测器的工作原理是利用光纤中的光速各向异性。这些数据证实了以前对光速各向异性、地球自转和轨道效应以及引力波的观测。
英文摘要：
Results from two optical-fiber gravitational-wave interferometric detectors are reported. The detector design is very small, cheap and simple to build and operate. Using two detectors has permitted various tests of the design principles as well as demonstrating the first simultaneous detection of correlated gravitational waves from detectors spatially separated by 1.1km. The frequency spectrum of the detected gravitational waves is sub-mHz with a strain spectral index a=-1.4 +/- 0.1. As well as characterising the wave effects the detectors also show, from data collected over some 80 days in the latter part of 2007, the dominant earth rotation effect and the earth orbit effect. The detectors operate by exploiting light speed anisotropy in optical-fibers. The data confirms previous observations of light speed anisotropy, earth rotation and orbit effects, and gravitational waves.
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