Phased multichannel laser systems with high spatial emission brightness

A. V. Fedin; T. T. Basiev; A. V. Gavrilov; S. N. Smetanin; A. S. Boreysho; V. F. Lebedev

doi:10.1117/12.881202

15 November 2010 Phased multichannel laser systems with high spatial emission brightness

A. V. Fedin, T. T. Basiev, A. V. Gavrilov, S. N. Smetanin, A. S. Boreysho, V. F. Lebedev

Proceedings Volume 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 775117 (2010) https://doi.org/10.1117/12.881202
Event: 18th International Symposium on Gas Flow and Chemical Lasers and High Power Lasers, 2010, Sofia, Bulgaria

Abstract

The phase-locked multichannel Nd:YAG laser systems with the long- and short-range coupling via the holographic gain gratings in the active elements are developed. The phase locking of various lamp- and diodepumped loop Nd:YAG lasers with an interference contrast of the laser channels of up to 0.87 and a singlemode lasing efficiency of up to 20% is experimentally demonstrated. The experimental results for the twoand three-channel laser systems are generalized on multichannel laser systems using the numerical simulation. It is demonstrated that the maximum number of the short-range-coupled laser channels can be increased owing to the leveling of the parameters of laser channels to a value that is greater than that the maximum number of the channels in the presence of the long-range coupling, which is limited by the damage threshold of the active element of the interchannel coupling. Use of the multi-loop configuration of the laser resonator allows compensating not only phase distortions but also a gradient of gain in the diode side-pumped active elements.

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A. V. Fedin, T. T. Basiev, A. V. Gavrilov, S. N. Smetanin, A. S. Boreysho, and V. F. Lebedev "Phased multichannel laser systems with high spatial emission brightness", Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 775117 (15 November 2010); https://doi.org/10.1117/12.881202

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KEYWORDS

Laser systems engineering

Laser resonators

Holography

Mirrors

Resonators

Laser damage threshold

Semiconductor lasers

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