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Proceedings Paper

Coherent and spectral beam combining of fiber lasers using volume Bragg gratings
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Paper Abstract

Five-channel spectral beam combining (SBC) using volume Bragg gratings (VBGs) in photo-thermo-refractive (PTR) glass with 0.5 nm spectral separation between channels and combined power >750 W has been recently reported. We report on improvements in this technique with the use of thermal control of VBGs that allows precise high-power alignment required for dense SBC with 0.25 nm spectral separation of channels. Experimental results of passive coherent beam combining (CBC) of fiber lasers using multiplexed VBGs are presented and analyzed. Methods for achieving 100 kW class systems using novel hybrid architectures that combine both coherent and spectral beam combining are discussed.

Paper Details

Date Published: 4 May 2010
PDF: 8 pages
Proc. SPIE 7686, Laser Technology for Defense and Security VI, 768615 (4 May 2010); doi: 10.1117/12.851363
Show Author Affiliations
Apurva Jain, The College of Optics and Photonics, Univ. of Central Florida (United States)
Derrek Drachenberg, The College of Optics and Photonics, Univ. of Central Florida (United States)
Oleksiy Andrusyak, The College of Optics and Photonics, Univ. of Central Florida (United States)
George Venus, The College of Optics and Photonics, Univ. of Central Florida (United States)
Vadim Smirnov, OptiGrate Corp. (United States)
Leonid Glebov, The College of Optics and Photonics, Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 7686:
Laser Technology for Defense and Security VI
Mark Dubinskii; Stephen G. Post, Editor(s)

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