The effect of decoloration on the properties of volume phase holograms based on silicate photothermorefractive glass

摘要

This paper discusses the decoloration process of volume phase holograms based on photothermorefractive (PTR) glass under the action of the second harmonic of the pulsed radiation of a neodymium laser. It is shown that the photodecoloration process increases the refractive-index modulation of PTR glass and reduces its absorption in the visible region.