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http://dx.doi.org/10.9766/KIMST.2019.22.4.467

On the Control of Initial Phases in Optical Phased Array Based LADAR Systems: Hill-Climbing Based Approach  

Kim, Taehoon (Institute of Defense Advanced Technology Research, Agency for Defense Development)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.22, no.4, 2019 , pp. 467-474 More about this Journal
Abstract
Recently, optical phased array(OPA) based laser detection and ranging(LADAR) has gained great interest to replace the traditional mechanical light detection and ranging technique(LiDAR). In OPA-based LADAR, it is well known that phases of laser pulses traveling through each of channels should be the same to obtain a narrow free-space single beam without noise-like ripples in the far field. However, it is difficult to provide such ideal condition due to the fabrication errors. To tackle this problem, any algorithms should be necessary to compensate the initial random phases of each channel in OPA antenna. In this paper, we propose a hill-climbing based phase calibration algorithm and evaluate the performance of the proposed algorithm.
Keywords
LADAR; Optical Phased Array; Hill-Climbing; Phase Calibration; Objective Function;
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