Two-dimensional diffractive coherent combining of 15 fiber amplifiers into a 600 W beam

被引：46

作者：

Thielen, Peter A. ^{[1
]}

Ho, James G. ^{[1
]}

Burchman, David A. ^{[1
]}

Goodno, Gregory D. ^{[1
]}

Rothenberg, Joshua E. ^{[1
]}

Wickham, Michael G. ^{[1
]}

Flores, Angel ^{[2
]}

Lu, Chunte A. ^{[2
]}

Pulford, Benjamin ^{[2
]}

Robin, Craig ^{[2
]}

Sanchez, Anthony D. ^{[2
]}

Hult, D. ^{[3
]}

Rowland, K. B. ^{[4
]}

机构：

[1] Northrop Grumman Aerosp Syst, Redondo Beach, CA 90278 USA

[2] USAF, Directed Energy Directorate, Res Lab, Kirtland AFB, NM 87117 USA

[3] TREX Enterprises Corp, San Diego, CA 92121 USA

[4] Boeing LTS Inc, Albuquerque, NM 87185 USA

来源：

OPTICS LETTERS | 2012年 / 37卷 / 18期

关键词：

LASER ARRAY; HIGH-POWER; COMBINATION; EFFICIENCY; GRATINGS; KW;

D O I：

10.1364/OL.37.003741

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate coherent beam combining using a two-dimensionally patterned diffractive optic combining element. Fifteen Yb-doped fiber amplifier beams arranged in a 3 x 5 array were combined into a single 600 W, M-2 = 1.1 output beam with 68% combining efficiency. Combining losses under thermally stable conditions at 485 W were found to be dominated by spatial mode-mismatch between the free space input beams, in quantitative agreement with calculations using the measured amplitude and phase profiles of the input beams. (c) 2012 Optical Society of America

引用

页码：3741 / 3743

页数：3

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