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.