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Applied Optics

Applied Optics


  • Vol. 41, Iss. 10 — Apr. 1, 2002
  • pp: 1864–1871

Measurement of the induced refractive index in a photothermorefractive glass by a liquid-cell shearing interferometer

Oleg M. Efimov, Leonid B. Glebov, and Hervé P. Andre  »View Author Affiliations

Applied Optics, Vol. 41, Issue 10, pp. 1864-1871 (2002)

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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 10-7 for 1-mm-thick samples. A refractive-index increment in photothermorefractive glass of up to 5 × 10-6 was observed after UV exposure at 325 nm. A refractive-index decrement of up to 1 × 10-3 was 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

OCIS Codes
(090.2900) Holography : Optical storage materials
(100.2650) Image processing : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(160.2750) Materials : Glass and other amorphous materials
(260.5210) Physical optics : Photoionization
(350.5340) Other areas of optics : Photothermal effects

Original Manuscript: June 4, 2001
Revised Manuscript: October 3, 2001
Published: April 1, 2002

Oleg M. Efimov, Leonid B. Glebov, and Hervé P. Andre, "Measurement of the induced refractive index in a photothermorefractive glass by a liquid-cell shearing interferometer," Appl. Opt. 41, 1864-1871 (2002)

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