Open AccessDiffraction of volume Bragg gratings under high flux laser irradiation
Author(s) -
Xiang Zhang,
Jing Feng,
Bin Xiong,
Kuaisheng Zou,
Xiao Yuan
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.008291
Subject(s) - materials science , diffraction efficiency , optics , volume hologram , diffraction , laser , fiber bragg grating , refractive index , thermal expansion , diffraction grating , irradiation , optoelectronics , wavelength , composite material , physics , nuclear physics
Diffraction property of transmitting volume Bragg gratings (VBGs) recorded in photo-thermo-refractive glass (PTR) is studied under the irradiation of a continuous-wave fiber laser with flux of 1274 W/cm 2 . Dependence of temperature characteristics of VBGs prepared by different crystallization temperatures is presented. When temperature of VBGs rises up to 33°C, there are a 2.7% reduction and 1.59% ripple of diffraction efficiency for VBGs. The period variation caused by the thermal expansion of VBGs is used to explain the reduction of diffraction efficiency, and experimental results are in agreement with theoretical analysis.