게시판 최근논문

[하이라이트 논문] 한국광학회지 Vol. 32 No.1 (2021 February)_2

한국광학회 hit 298 date 2021-04-05

목표물 신호 모니터링 및 SPGD 알고리즘 기반 3 채널 타일형 결맞음 빔결합 시스템 연구

김영찬1ㆍ윤영선1ㆍ김한솔2ㆍ장한별2ㆍ박재덕4ㆍ최윤진4ㆍ나정균2ㆍ이주한2ㆍ강현구2ㆍ여민수2ㆍ최규홍1ㆍ노영철1 ㆍ정윤찬2,3ㆍ이혁재2,3ㆍ유봉안1ㆍ염동일4,5ㆍ전창수1


 

Korean Journal of Optics and Photonics Vol. 32 No. 1, February 2021, pp. 1-8
DOI:  https://doi.org/10.3807/KJOP.2021.32.1.001

 

We have studied a tiled-aperture coherent-beam-combining system based on constructive interference, as a way to overcome the power limitation of a single laser. A 1-watt-level, 3-channel coherent fiber laser and a 3-channel fiber array of triangular tiling with tip-tilt function were developed. A monitoring system, phase controller, and 3-channel phase modulator formed a closed-loop control system, and the SPGD algorithm was applied. Eventually, phase-locking with a rate of 5–67 kHz and peak-intensity efficiency comparable to the ideal case of 53.3% was successfully realized. We were able to develop the essential elements for a tiled-aperture coherent-beam-combining system that had the potential for highest output power without any beam-combining components, and a multichannel coherent-beam-combining system with higher output power and high speed is anticipated in the future.