Simultaneous detection of beam pointing and optical phase errors for multiple beams using a quadrant photo detector for high-efficiency coherent beam combining systems

被引：14

作者：

Haraguchi, Eisuke ^{[1
,2
]}

Akiyama, Tomohiro ^{[1
]}

Ando, Toshiyuki ^{[1
]}

Sekikawa, Taro ^{[2
]}

机构：

[1] Mitsubishi Electr Corp, 5-1-1 Ofuna, Kamakura, Kanagawa 2478501, Japan

[2] Hokkaido Univ, Dept Appl Phys, Kita Ku, Kita 13 Nishi 8, Sapporo, Hokkaido 0608628, Japan

来源：

APPLIED PHYSICS EXPRESS | 2019年 / 12卷 / 10期

基金：

日本学术振兴会;

关键词：

FIBER AMPLIFIERS; ACTIVE PHASE; HIGH-POWER; KW; LOCKING; COMBINATION; ARRAY; ALGORITHM;

D O I：

10.7567/1882-0786/ab411d

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this letter, we propose and demonstrate a technique, based on radio frequency demodulation, for coherent beam combining (CBC) systems to simultaneously detect beam pointing and optical phase errors for multiple beams using a quadrant photo detector. The standard deviation of the detection accuracy of the beam pointing error was 0.19 mu rad, and that of the residual optical phase error, at the time of optical phase locking, was 0.7 degrees, yielding a high combining efficiency of 99%. This technique has the potential to increase beam combination to over 100 elements and offer efficient and highly scalable CBC systems. (C) 2019 The Japan Society of Applied Physics

引用

页数：5

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