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Optics Letters

Optics Letters


  • Vol. 23, Iss. 13 — Jul. 1, 1998
  • pp: 986–988

Fiber coupling efficiency for random light and its applications to lidar

Peter J. Winzer and Walter R. Leeb  »View Author Affiliations

Optics Letters, Vol. 23, Issue 13, pp. 986-988 (1998)

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Employing the van Cittert–Zernike theorem of classical coherence theory, we derive a general expression for the efficiency with which quasi-monochromatic random light can be coupled to an optical fiber by means of a lens. For the important case of a source with Gaussian intensity distribution, we obtain and discuss the dependence of the coupling efficiency to single-mode fibers on the lens-to-fiber coupling geometry as well as on the ratio of lens size to speckle size. A specialization to the emerging fields of both incoherent and coherent fiber-based lidar applications shows that a maximum coupling efficiency of ~42% can be obtained for a monostatic system.

© 1998 Optical Society of America

OCIS Codes
(010.3640) Atmospheric and oceanic optics : Lidar
(030.6140) Coherence and statistical optics : Speckle
(030.6600) Coherence and statistical optics : Statistical optics
(040.2840) Detectors : Heterodyne
(060.2310) Fiber optics and optical communications : Fiber optics
(280.3640) Remote sensing and sensors : Lidar

Peter J. Winzer and Walter R. Leeb, "Fiber coupling efficiency for random light and its applications to lidar," Opt. Lett. 23, 986-988 (1998)

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