Photoinduced Bragg reflector in As2S3 glass

Abstract
Bragg reflectors have been fabricated in As2S3 glasses through the photoinduced refractive‐index change process. Illumination of single monochromatic beams can produce Bragg reflectors with a half Bragg width of 2 nm in wavelength and the reflectivity estimated from the transmission decrease at 10%–20%. The reflectors can be erased with annealing and polychromatic illumination.