Demodulation of Intensity and Shot Noise in the Optical Heterodyne Detection of Laser Interferometers for Gravitational Waves
Applied Optics, Vol. 40, Issue 36, pp. 6596-6605 doi:10.1364/AO.40.006596
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- OCIS Codes:
- (030.5260) Coherence and statistical optics : Photon counting
- (040.2840) Detectors : Heterodyne
- (040.5160) Detectors : Photodetectors
- (060.5060) Fiber optics and optical communications : Phase modulation
Citation
Malik Rakhmanov, "Demodulation of Intensity and Shot Noise in the Optical Heterodyne Detection of Laser Interferometers for Gravitational Waves," Appl. Opt. 40, 6596-6605 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-36-6596
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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.
© 2001 Optical Society of America
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Author Affiliations
When this research was performed, the author was with the Laser Interferometer Gravitational Wave Observatory (LIGO) Project, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125. He is now with the Department of Physics, University of Florida, P.O. Box 118440, Gainesville, Florida 32611 and can be reached at malik@phys.ufl.edu.
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