High Efficiency Volume Diffractive Elements in Photo-Thermo-Refractive Glass

Comparative study of photo-induced variations of X-ray diffraction and refractive index in photo-thermo-refractive glass

Spontaneous and photo-induced crystallization have been investigated in fluorinated silicate glass by means of X-ray diffraction and optical interferometry. This glass is a photo-sensitive material for high-efficiency phase volume hologram recording. Variations of a refractive index in this glass are controlled by UV irradiation followed by a thermal development which is photo-thermo-refractive...

Process of production of high efficiency diffractive and refractive optical elements in multicomponent silicate glass by nonlinear photo ionization followed by thermal development

Binary volume phase masks in photo-thermo-refractive glass.

Permanent binary phase masks with planar surfaces and high tolerance to laser radiation are recorded in the volume of photo-thermo-refractive glass using the contact copying technique and binary amplitude master masks. Conversion of a Gaussian beam to higher order modes is shown.

Continuous-wave diode-pumped laser action of Nd³⁺-doped photo-thermo-refractive glass.

Laser action of the photo-thermo-refractive (PTR) glass, which is the photosensitive material for holographic recording of volume Bragg gratings (VBGs), was demonstrated for the first time by introducing Nd³⁺. Nd:PTR glass has a bandwidth of 27.8 nm and 16.0 nm for luminescence and absorption, respectively. An uncoated 2 mm thick Nd:PTR element generated cw laser output of 124 mW, with a slope ...

Absorption and scattering in photo-thermo-refractive glass induced by UV-exposure and thermal development

Photo-thermo-refractive (PTR) glass is a multicomponent photosensitive silicate glass that, after successive UV-exposure and thermal treatment, exhibits a refractive index change that results from the precipitation of nano-crystalline NaF. This glass is successfully used for the fabrication of holographic optical elements (volume Bragg gratings) that dramatically enhance properties of numerous ...