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Applied Optics

Applied Optics


  • Vol. 35, Iss. 30 — Oct. 20, 1996
  • pp: 5999–6009

Coherent optical array receivers for the mitigation of atmospheric turbulence and speckle effects

Philip Gatt, Thomas P. Costello, Dean A. Heimmermann, Diana C. Castellanos, Arthur R. Weeks, and C. Martin Stickley  »View Author Affiliations

Applied Optics, Vol. 35, Issue 30, pp. 5999-6009 (1996)

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A description is given of the design, operation, and test over a 2-km path (roundtrip) of a continuous wave, coherent laser array receiver that uses two independent aperture–receivers whose intermediate frequencies are electro-optically co-phased in real time and then added as a proposed way to overcome effective aperture limitations imposed by atmospheric turbulence and to mitigate signal fading associated with atmospheric turbulence and speckle effects. The experiment resulted in a mean carrier-to-noise ratio increase of 1.8, which is within 1% of the theoretical predictions, when the two signals were phase locked, versus no increase without phase locking. Further, the carrier fading strength, or normalized carrier-to-noise ratio variance, was reduced by a factor of 0.53, which is within 2% of the theoretical prediction. The bandwidth of the electro-optic phase-locked loop was measured to be of the order of 600 Hz, which is adequate to compensate for atmospheric refractive turbulence fluctuations.

© 1996 Optical Society of America

Original Manuscript: July 14, 1995
Revised Manuscript: February 27, 1996
Published: October 20, 1996

Philip Gatt, Thomas P. Costello, Dean A. Heimmermann, Diana C. Castellanos, Arthur R. Weeks, and C. Martin Stickley, "Coherent optical array receivers for the mitigation of atmospheric turbulence and speckle effects," Appl. Opt. 35, 5999-6009 (1996)

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  1. L. R. Kahn, “Ratio squarer,” Proc. IRE 42, 1704–••• (1954).
  2. D. G. Brennan, “Linear diversity combining techniques,” Proc. IRE 47, 1075–1102 (1959). [CrossRef]
  3. J. D. Parsons, “Diversity techniques in communications receivers,” in Advanced Signal Processing, D. A. Creasey, ed. (Peregrinus, London, 1985), Chap. 6. [CrossRef]
  4. I. Goldstein, P. A. Miles, A. Chabot, “Heterodyne measurements of light propagation through atmospheric turbulence,” Proc. IEEE 53, 1172–1180 (1965). [CrossRef]
  5. D. L. Fried, “Optical heterodyne detection of an atmospherically distorted signal wave front,” Proc. IEEE 55, 57–67 (1967). [CrossRef]
  6. D. Fink, S. N. Vodopia, “Coherent detection SNR of an array of detectors,” Appl. Opt. 15, 453–454 (1976). [CrossRef] [PubMed]
  7. J. H. Shapiro, B. A. Capron, R. C. Harney, “Imaging and target detection with a heterodyne-reception optical radar,” Appl. Opt. 20, 3292–3313 (1981). [CrossRef] [PubMed]
  8. H. T. Yura, W. G. McKinley, “Aperture averaging of scintillation for space-to-ground optical communication applications,” Appl. Opt. 22, 1608–1609 (1983). [CrossRef] [PubMed]
  9. W. B. Veldkamp, E. J. Van Allen, “Binary holographic LO beam multiplexer for IR imaging detector arrays,” Appl. Opt. 22, 1497–1507 (1983). [CrossRef] [PubMed]
  10. W. B. Veldkamp, “Holographic local-oscillator beam multiplexing for array heterodyne detection,” Appl. Opt. 22, 891–900 (1983). [CrossRef] [PubMed]
  11. W. B. Veldkamp, C. J. Kastner, “Beam profile shaping for laser radars that use detector arrays,” Appl. Opt. 21, 345–356 (1982). [CrossRef] [PubMed]
  12. J. H. Shapiro, “Heterodyne mixing efficiency for detector arrays,” Appl. Opt. 26, 3600–3606 (1987). [CrossRef] [PubMed]
  13. B. E. Edwards, “Design aspects of an infrared laser radar,” Laser Appl. 1, 47–50 (1982).
  14. K. P. Chan, D. K. Killinger, “Enhanced detection of atmospheric-turbulence-distorted 1-μm coherent lidar returns using a two-dimensional heterodyne array,” Opt. Lett. 17, 1237–1239 (1992). [CrossRef] [PubMed]
  15. N. Sugimoto, K. P. Chan, D. K. Killinger, “Optimal heterodyne detector array size for 1-μm coherent lidar propagation through atmospheric turbulence,” Appl. Opt. 30, 2609–2616 (1991). [CrossRef] [PubMed]
  16. K. P. Chan, D. K. Killinger, “Coherent summation of spatially distorted laser Doppler signals by using a two-dimensional heterodyne detector array,” Opt. Lett. 17, 1237–1239 (1992). [CrossRef] [PubMed]
  17. C. G. Bachman, Laser Radar Systems and Techniques (Artech, Wayland, Mass., 1979), Chap. 2.
  18. J. W. Goodman, Statistical Optics (Wiley, New York, 1985), Chap. 2.
  19. This equation results by following an analysis similar to Parsons’ analysis for the mean CNR.3 In this case up to the fourth moment of the field amplitude is required to calculate the second moment of the CNR, which is then used to derive the normalized CNR variance.
  20. J. Y. Wang, A. P. Pruitt, “Effects of speckle on the range precision of a scanning lidar,” Appl. Opt. 31, 801–808 (1992). [CrossRef] [PubMed]
  21. J. F. Holmes, J. S. Peacock, D. C. Draper, “Optical remote sensing of surface roughness through optical turbulence,” Appl. Opt. 33, 7770–7776 (1994). [CrossRef] [PubMed]
  22. R. K. Tyson, Principles of Adaptive Optics (Academic, New York, 1991), Chap. 2.
  23. V. S. Gudimetla, J. F. Holmes, “Probability density function of the intensity for a laser-generated speckle field after propagation through the turbulent atmosphere,” J. Opt. Soc. Am. 72, 1213–1218 (1982). [CrossRef]
  24. N. E. Zirkind, J. H. Shapiro, “Adaptive optics for large aperture coherent laser radars,” in Laser Radar III, R. J. Becherer, ed., Proc. SPIE999, 117–135 (1989).
  25. J. E. Pearson, “Compensation of propagation distortions using coherent optical adaptive techniques (COAT),” in Optical Design Problems in Laser Systems, W. R. Sooy, ed., Proc. SPIE69, 21–22 (1975).
  26. S. A. Kokorowski, T. R. O’Meara, R. C. Lind, T. Calderone, “Automatic speckle cancellation techniques for multidither adaptive optics,” Appl. Opt. 19, 371–381 (1980). [CrossRef] [PubMed]

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