Measurement of the Induced Refractive Index in a Photothermorefractive Glass by a Liquid-Cell Shearing Interferometer
Applied Optics, Vol. 41, Issue 10, pp. 1864-1871 (2002)
http://dx.doi.org/10.1364/AO.41.001864
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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 10−7 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
[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
Citation
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)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-10-1864
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