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Optics Letters

Optics Letters


  • Vol. 9, Iss. 5 — May. 1, 1984
  • pp: 189–191

Noise in homodyne detection

Bonny L. Schumaker  »View Author Affiliations

Optics Letters, Vol. 9, Issue 5, pp. 189-191 (1984)

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A simple but rigorous analysis of the important sources of noise in homodyne detection is presented. Output noise and signal-to-noise ratios are compared for direct detection, conventional (one-port) homodyning, and two-port homodyning, in which one monitors both output ports of a 50–50 beam splitter. It is shown that two-port homodyning is insensitive to local-oscillator quadrature-phase noise and hence provides (1) a means of detecting reduced quadrature-phase fluctuations (squeezing) that is perhaps more practical than one-port homodyning and (2) an output signal-to-noise ratio that can be a modest to significant improvement over that of one-port homodyning and direct detection.

© 1984 Optical Society of America

Original Manuscript: October 11, 1983
Manuscript Accepted: February 22, 1984
Published: May 1, 1984

Bonny L. Schumaker, "Noise in homodyne detection," Opt. Lett. 9, 189-191 (1984)

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