Rakhmanov M
Laser Interferometer Gravitational Wave Observatory (LIGO) Project, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA.
Appl Opt. 2001 Dec 20;40(36):6596-605. doi: 10.1364/ao.40.006596.
Demodulation of intensity noise in the optical heterodyne detector is analyzed for application in interferometric gravitational-wave detectors. The correlation function and the power spectral density of the demodulated intensity noise are derived, taking into account the effect of bandpass filtering at the photodiode and an arbitrary demodulation waveform. The analysis includes demodulation of the rf-modulated shot noise as a special case of the intensity noise. For shot-noise-limited detection, the signal-to-noise ratio is found as a function of the modulation parameters, and the optimization of the signal-to-noise ratio with respect to the demodulation phase is described.
针对干涉式引力波探测器中的应用，分析了光学外差探测器中强度噪声的解调。考虑到光电二极管处带通滤波的影响和任意解调波形，推导了解调强度噪声的相关函数和功率谱密度。该分析将射频调制散粒噪声的解调作为强度噪声的一种特殊情况包含在内。对于散粒噪声限制的探测，找到了信噪比作为调制参数的函数，并描述了信噪比相对于解调相位的优化。
