<title>New possibilities of photosensitive glasses for three-dimensional phase hologram recording</title>

Quantitative UV–VIS spectroscopic studies of photo-thermo-refractive glasses. I. Intrinsic, bromine-related, and impurity-related UV absorption in photo-thermo-refractive glass matrices

“…VI. In the course of further heat treatment at temperatures around T g , the colloidal silver particles play the role of nucleation centers around which the nano-sized fluoride crystals (mostly NaF and also AgBr and NaBr) start growing [6,11,12]. It is these nano-sized NaF crystals that are considered to be responsible for a decrease in the refractive index of the treated PTR glass sample as a whole.…”

“…In the late 1980s -early 1990s [7][8][9][10][11], it was proposed first in Vavilov State Optical Institute to apply PC/MC glasses for recording the 3D phase holograms. Unlike the case of PC/MC coloration, a single stage of photo-thermo-induced crystallization was used only, this stage including the UV irradiation and subsequent heat treatment.…”

Method to assess the homogeneity of partially crystallized glasses: Application to a photo-thermo-refractive glass

“…PTR glass is a sodium-potassium-zinc-aluminum-silicate glass containing fluorine and bromine, doped with cerium, silver, antimony and tin. Glasses which undergo photo-thermo-induced crystallization were invented many years ago by Stookey [7] and have been studied as possible candidates for hologram writing in the last 20 years [1][2][3][4]. After exposure of this glass to UV-radiation followed by thermal development [8] crystallization of up to 3 wt% sodium fluoride nanocrystals occurs and the net result is a decrease of the local refractive index in the UV-exposed crystallized regions.…”

“…Photo-thermo-refractive (PTR) glass is a photosensitive glass that undergoes significant refractive index changes after successive UV-exposure and thermal development [1][2][3][4] which is due to the precipitation of nanosize crystals in the UV-exposed areas. Therefore, this glass is suitable for phase hologram recording and is attractive for many advanced applications, such as optical filtering, mode selection in lasers and spectral beam combining [5,6].…”

Glassy Materials and Light: Part 1

“…17 Além das mudanças de cores resultantes desses mecanismos, foi observado posteriormente que o efeito fotossensível nesses vidros policromáticos resultava em variações de índice de refração do volume irradiado e tratado da ordem de 5×10 -4 , permitindo a gravação de redes de Bragg de alta eficiência com espessuras maiores que 100 µm. [18][19][20] Esses vidros fotossensíveis apresentando variação de índice de refração por iluminação seguida de tratamento térmico foram denominados de vidros foto-termo-refrativos.…”