Laser Setup for Volume Diffractive Optical Elements Recording in Photo-Thermo-Refractive Glass
Technical Report,01 Aug 2014,30 Nov 2015
University of Central Florida Orlando United States
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Recorded in photo-thermo-refractive PTR glass volume Bragg gratings VBGs have found great applications for enhancement of lasersbrightness and fine spectral filtering. However, further increase of size of holographic optical elements, which are required for high powerlaser applications, is restrained because of absence of available lasers emitting on PTR glass photosensitivity region 300-350 nm with largecoherence length and high power simultaneously. The recently discovered photosensitivity of PTR glass at 355 nm enabled development ofspecs for a new laser system to record large aperture holograms. This laser was fabricated by Continuum Corp., a hologram recording setupwith this laser was assembled at CREOL and successful recording of holographic optical elements was demonstrated. Research programs,which will benefit from the requested instrumentation, are in the areas of high power solid state, fiber and semiconductor laser systems,spectral beam combining of high power lasers, and stretching and compression of ultra-short laser pulses. CREOL will be able to developnew holographic optical elements that recently were considered impossible to create. Moreover, new phenomena recently discovered withthis laser would pave a way for extension of spectral range of VBG operation to shorter wavelengths in UV and to longer wavelengths in IR.
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