Beam combining of lasers with high spectral density using volume Bragg gratings

    Authors

    O. Andrusyak; V. Smirnov; G. Venus;L. Glebov

    Comments

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    Abbreviated Journal Title

    Opt. Commun.

    Keywords

    Laser beam combining; Volume holographic gratings; Photorefractive; materials; FIBER LASERS; HIGH-POWER; PTR GLASS; DIFFRACTION; Optics

    Abstract

    Incoherent combining of multiple laser beams with offset wavelengths into a single near-diffraction-limited beam is an effective solution to increasing energy brightness and scaling output power of high-power lasers. Volume Bragg gratings (VBGs) recorded in photo-thermo-refractive (PTR) glass allow spectral beam combining with a remarkably high spectral density of channels. Spectral beam combining (SBC) of five channels within 1-2 nm bandwidth around 1064 and 1550 nm into a single near-diffraction-limited beam with absolute efficiency 92-94% is demonstrated. Scaling of this technique to multi-kW power level is discussed. (C) 2009 Elsevier B.V. All rights reserved.

    Journal Title

    Optics Communications

    Volume

    282

    Issue/Number

    13

    Publication Date

    1-1-2009

    Document Type

    Article

    Language

    English

    First Page

    2560

    Last Page

    2563

    WOS Identifier

    WOS:000266762600020

    ISSN

    0030-4018

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