Band-stop angular filtering with hump volume Bragg gratings
نویسندگان
چکیده
منابع مشابه
Angular directivity of diffracted wave in Bragg-mismatched readout of volume holographic gratings
We investigated theoretically and experimentally angular directivity of a diffracted beam in volume holographic gratings. We measured the angular direction of the diffracted beam as a function of Bragg-angle deviation of the read beam and showed that the experimental result agrees well with the Ewald sphere vector model (ESVM). We also showed that the Kogelnik’s coupled-wave theory (CWT) is cor...
متن کاملTransverse mode selection in laser resonators using volume Bragg gratings
Power scaling of high power laser resonators is limited due to several nonlinear effects. Scaling to larger mode areas can offset these effects at the cost of decreased beam quality, limiting the brightness that can be achieved from the multi-mode system. In order to improve the brightness from such multi-mode systems, we present a method of transverse mode selection utilizing volume Bragg grat...
متن کاملOptical microfabrication of highly reflective volume Bragg gratings
An approach for fabricating wide-bandwidth and highly reflective Bragg grating structures with the technique of holographic photopolymerization of a liquid crystal sLCd polymer composite is presented. The key to this fabrication method that distinguishes it from previous methods is the use of a nonreactive solvent, acetone, to dissolve the photoinitiator and coinitiator in an acrylate monomer/L...
متن کاملA simple method for Bragg diffraction in volume holographic gratings
We discuss a simple beam interference approximation method for deriving the angular selectivity of diffraction in weakly modulated volume holographic gratings. The results obtained using the multiple beam interference model agree qualitatively with the results obtained from a physical optics treatment of the coupled-wave theory for volume holographic gratings. © 2009 American Association of Phy...
متن کاملUltimate efficiency of spectral beam combining by volume Bragg gratings.
Spectral beam combining (SBC) by volume Bragg gratings (VBGs) recorded in photo-thermo-refractive (PTR) glass is a powerful tool for laser applications that require higher radiance than a single laser unit can achieve. The beam-combining factor (BCF) is introduced as a tool to compare various beam-combining methods and experiments. It describes the change of radiance provided by a beam-combinin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: High Power Laser Science and Engineering
سال: 2019
ISSN: 2095-4719,2052-3289
DOI: 10.1017/hpl.2019.12