Title

Measurement Of The Induced Refractive Index In A Photothermorefractive Glass By A Liquid-Cell Shearing Interferometer

Abstract

A liquid-cell shearing interferometer was developed to measure refractive-index variations (Δn) in transparent materials. The cell was filled with a liquid having a matched refractive index. The achieved resolution was better than 1/1000 of a fringe shift and resulted in a Δn measurement sensitivity down to 10-7for 1-mm-thick samples. A refractive-index increment in photothermorefractive glass of up to 5 × 10-6was observed after UV exposure at 325 nm. A refractive-index decrement of up to 1 × 10-3was observed after thermal development of the exposed sample. It was proved that photothermorefractive glass obeys the reciprocity law; i.e., Δn depends on the UV dosage but does not depend on the irradiance. © 2002 Optical Society of America.

Publication Date

1-1-2002

Publication Title

Applied Optics

Volume

41

Issue

10

Number of Pages

1864-1871

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/AO.41.001864

Socpus ID

0036543417 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0036543417

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