Title

Nonlinear Refractive Index Of Photo-Thermo-Refractive Glass

Keywords

Nonlinear refractive index; Photo-thermo-refractive glass; Pump-probe method

Abstract

Nonlinear properties of a photo-thermo-refractive (PTR) glass are studied and compared with those in fused silica and a conventional optical glass. PTR glass is a new photosensitive medium for high-efficiency phase volume hologram recording which manifests a linear refractive index modulation after exposure to UV radiation followed by thermal treatment. Nonlinear optical properties of PTR glass exposed to femtosecond laser pulses are studied. Diffraction patterns in a propagated laser beam focused in the sample were detected by a CCD, while a nonlinear refractive index was measured by a collinear-orthogonal-polarization- pump-probe (COP3) method. It was found that nonlinear refractive index of PTRG is n2 = 3.3 × 10-20 m2/W (0.33 ppm cm2/GW) which is about the same as for the fused silica. It is important that n2 in PTR glass does not vary after UV exposure and thermal development. © 2005 Elsevier B.V. All rights reserved.

Publication Date

1-1-2006

Publication Title

Optical Materials

Volume

28

Issue

4

Number of Pages

401-407

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.optmat.2005.02.004

Socpus ID

28244487263 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/28244487263

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