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Applied Optics

Applied Optics


  • Vol. 17, Iss. 8 — Apr. 15, 1978
  • pp: 1194–1198

Bandpass filtering of moving-object laser heterodyne-signals by finite apertures

J. Carl Leader  »View Author Affiliations

Applied Optics, Vol. 17, Issue 8, pp. 1194-1198 (1978)

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Expressions for the frequency power spectral density and power spectral density SNR of a heterodyne detection system are derived assuming the signal radiation field results from a laser illuminated, moving rough object. The calculated spectral density is attenuated at large spectral spread frequencies (resulting from target rotation) by averaging of the high spatial frequency speckle pattern by the finite extent (aperture) of the local oscillator field. Optimum signal detection is obtained only at the Doppler shifted frequency. Spatial anisotropy of the radiation field mutual coherence function precludes exact calculations for arbitrary local oscillator field distributions.

© 1978 Optical Society of America

Original Manuscript: September 9, 1977
Published: April 15, 1978

J. Carl Leader, "Bandpass filtering of moving-object laser heterodyne-signals by finite apertures," Appl. Opt. 17, 1194-1198 (1978)

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  1. J. C. Dainty, Laser Speckle and Related Phenomena (Springer-Verlag, New York, 1975).
  2. H. T. Yura, Appl. Opt. 13, 150 (1974). [CrossRef] [PubMed]
  3. J. C. Leader, J. Opt. Soc. Am. 67, 1091 (1977). [CrossRef]
  4. D. L. Fried, Proc. IEEE 55, 57 (1967). [CrossRef]
  5. A. E. Siegman, Proc. IEEE 54, 1350 (1966). [CrossRef]

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