The paper is a survey of properties and applications of optical elements which are volume Bragg gratings (VBGs) recorded in photo-thermo-refractive (PTR) glass. These elements are narrow band filters that operate in spectral, angular and temporal domains. They provide spectral narrowing, stabilization and tuning of laser radiation; narrowing of divergence and beam steering; stretching, compression and temporal shaping of laser pulses, integration of different laser components in the same material and fabrication of monolithic solid state lasers; and passive and active coherent combining along with high density spectral combining of fiber lasers.
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Leonid Glebov (2013) studied this question.
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