| On the Control of Initial Phases in Optical Phased Array Based LADAR Systems: Hill-Climbing Based Approach |
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Taehoon Kim |
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Institute of Defense Advanced Technology Research, Agency for Defense Development |
| 광위상배열 기반 LADAR의 초기 위상 제어 기법 연구: 언덕 오름 기반 접근법 |
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김태훈 |
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국방과학연구소 국방첨단기술연구원 |
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| Abstract |
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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. |
| Key Words:
LADAR, Optical Phased Array, Hill-Climbing, Phase Calibration, Objective Function |
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