Optimum conditions for heterodyne detection of light

Details Optimum conditions for heterodyne detection of light Optimum conditions for heterodyne detection of light

Apr 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975josa...65..413m&link_type=abstract

Optical Society of America, Journal, vol. 65, Apr. 1975, p. 413-420. Army-supported research.

Physics

6

Background Noise, Light Beams, Optical Heterodyning, Optimization, Signal Detection, Signal To Noise Ratios, Coherent Light, Current Distribution, Monochromatic Radiation, Oscillators, Photoelectricity

Scientific paper

The problem of detecting a coherent light beam in the presence of unwanted background radiation by the heterodyne method is examined. For a sufficiently strong local-oscillator field, the detectability of the signal is unaffected by the presence of the background radiation. It is shown that, in general, there exists an optimum receiver size that maximizes the signal-to-noise ratio. This result is illustrated by several examples. A procedure for the detection of a light signal of unknown direction is suggested.

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