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Complex-optical-field lidar system for range and vector velocity measurement |
Optics Express, Vol. 20, Issue 23, pp. 25867-25875 (2012)
http://dx.doi.org/10.1364/OE.20.025867
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Abstract
A coherent lidar system based on the measurement of complex optical field is demonstrated for the first time. An electro-optic in-phase/quadrature (I/Q) modulator is used in the lidar transmitter to realize carrier-suppressed complex optical field modulation in which the positive and the negative optical sidebands can carry independent modulation waveforms. A fiber-optic 90° hybrid is used in the lidar receiver for coherent heterodyne detection and to recover the complex optical field. By loading a constant modulation frequency on the lower optical sideband and a wideband linear frequency chirp on the upper sideband, vector velocity and target distance can be measured independently. The wide modulation bandwidth of this lidar system also enabled unprecedented range resolution and the capability of measuring high velocity unambiguously.
© 2012 OSA
OCIS Codes
(040.2840) Detectors : Heterodyne
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(280.3640) Remote sensing and sensors : Lidar
ToC Category:
Remote Sensing
History
Original Manuscript: September 10, 2012
Revised Manuscript: October 20, 2012
Manuscript Accepted: October 22, 2012
Published: November 1, 2012
Citation
Shuang Gao, Maurice O’Sullivan, and Rongqing Hui, "Complex-optical-field lidar system for range and vector velocity measurement," Opt. Express 20, 25867-25875 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-23-25867
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