降低失谐腔在KAGRA中的多余噪声的方法
Method to reduce excess noise of a detuned cavity for application in KAGRA
摘要:
地面引力波探测器是以高精度激光干涉测量法为基础的。提高探测器灵敏度的一种有前途的技术是光学腔的失谐,它增强了目标天文源在某些频率附近的信号。然而,由于控制边带的不对称性,失谐涉及技术噪声,其包括光电检测器噪声和振荡器相位噪声。在这里,我们介绍了一种解决方案,以减少这两种多余的噪声使用的幅度调制边带,补偿的不对称性。该解决方案计划在日本第二代引力波探测器KAGRA中实施。
英文摘要:
Ground-based gravitational-wave detectors are based on high precision laser interferometry. One promising technique to improve the detector's sensitivity is the detuning of an optical cavity, which enhances the signal at around certain frequencies for target astronomical sources. The detuning, however, involves technical noise due to an asymmetry of the control sidebands, which includes photo-detector noise and oscillator-phase noise. Here, we introduce a solution to reduce the two kinds of excess noise using an amplitude-modulation sideband that compensates the asymmetry. The solution is planned to be implemented in the Japanese second-generation gravitational-wave detector KAGRA.
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