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Applied Optics

Applied Optics


  • Vol. 40, Iss. 36 — Dec. 20, 2001
  • pp: 6596–6605

Demodulation of intensity and shot noise in the optical heterodyne detection of laser interferometers for gravitational waves

Malik Rakhmanov  »View Author Affiliations

Applied Optics, Vol. 40, Issue 36, pp. 6596-6605 (2001)

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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

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

Original Manuscript: August 15, 2000
Revised Manuscript: August 27, 2001
Published: December 20, 2001

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)

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