Complex-optical-field lidar system for range and vector velocity measurement
Sullivan, Maurice O.
Optics Society of America
Scholarly/refereed, publisher version
Copyright ©2012 Optical Society of America. The author may also publish the article on his or her own noncommercial web page ("noncommercial" pages are defined here as those not charging for admission to the site or for downloading of material while on the site).
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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.
A grant from the One-University Open Access Fund at the University of Kansas was used to defray the author’s publication fees in this Open Access journal. The Open Access Fund, administered by librarians from the KU, KU Law, and KUMC libraries, is made possible by contributions from the offices of KU Provost, KU Vice Chancellor for Research & Graduate Studies, and KUMC Vice Chancellor for Research. For more information about the Open Access Fund, please see http://library.kumc.edu/authors-fund.xml.
Gao, Shuang; Sullivan, Maurice O.; and Hui, Rongqing. (2012) Complex-optical-field lidar system for range and vector velocity measurement. Optics Express, 20.23. http://dx.doi.org/10.1364/OE.20.025867
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