Authors

L. Glebov; V. Smirnov; E. Rotari; I. Cohanoschi; L. Glebova; O. Smolski; J. Lumeau; C. Lantigua;A. Glebov

Comments

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Abbreviated Journal Title

Opt. Eng.

Keywords

chirped pulse amplification; chirped Bragg gratings; photo-thermo-refractive glass; DIFFRACTION; SYSTEM; GLASS; Optics

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 mu m 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 M-2 < 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. (C) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

Journal Title

Optical Engineering

Volume

53

Issue/Number

5

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

8

WOS Identifier

WOS:000340680800017

ISSN

0091-3286

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