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Optical Engineering • Open Access

Volume-chirped Bragg gratings: monolithic components for stretching and compression of ultrashort laser pulses

Paper Abstract

An innovative type of optical component—a volume Bragg grating—has recently become available commercially and has found wide applications in optics and photonics due to its unusually fine spectral and angular filtering capability. Reflecting volume Bragg gratings, with the grating period gradually changing along the beam propagation direction (chirped Bragg gratings—CBGs) provide stretching and recompression of ultrashort laser pulses. CBGs, being monolithic, are robust devices that have a footprint three orders of magnitude smaller than that of a conventional Treacy compressor. CBGs recorded in photo-thermo-refractive glass can be used in the spectral range from 0.8 to 2.5 μm with the diffraction efficiency exceeding 90%, and provide stretching up to 1 ns and compression down to 200 fs for pulses with energies and average powers exceeding 1 mJ and 250 W, respectively, while keeping the recompressed beam quality M2 <1.4 , and possibly as low as 1.1. This paper discusses fundamentals of stretching and compression by CBGs, the main parameters of the gratings including the CBG effects on the laser beam quality, and currently achievable CBG specifications.

Paper Details

Date Published: 6 February 2014
PDF: 9 pages
Opt. Eng. 53(5) 051514 doi: 10.1117/1.OE.53.5.051514
Published in: Optical Engineering Volume 53, Issue 5
Show Author Affiliations
Leonid B. Glebov, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Vadim Smirnov, OptiGrate Corp. (United States)
Eugeniu Rotari, OptiGrate Corp. (United States)
Ion Cohanoschi, OptiGrate Corp. (United States)
Larissa Glebova, OptiGrate Corp. (United States)
Oleg V. Smolski, OptiGrate Corp. (United States)
Julien Lumeau, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Christopher Lantigua, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Alexei Glebov, OptiGrate Corp. (United States)


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