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Noise in homodyne detection.

Authors
  • Schumaker, B L
Type
Published Article
Journal
Optics letters
Publication Date
May 01, 1984
Volume
9
Issue
5
Pages
189–191
Identifiers
PMID: 19721539
Source
Medline
License
Unknown

Abstract

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.

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