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Proceedings Paper

Measurement of thermal expansion and thermo-optic coefficients in LiNbO3 and KTiOPO4 crystals using dual-interferometric techniques
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Paper Abstract

We describe a dual-interferometric setup for simultaneous and independent measurement of the thermal expansion coefficient and thermo-optic coefficients in ferroelectric crystals (LiNbO3 and KTiOPO4). The crystal temperature varies from room temperature up to 200°C by an actively stabilized oven. The thermal expansion coefficient is determined using a moire interferometer and monitoring, as a function of the temperature, the period of a grating written on one side of the crystal sample. The thermo-optic coefficients of the ordinary and extraordinary axes of LiNbO3 crystal are estimated by measuring the optical path variation measured using a Mach-Zehnder interferometer.

Paper Details

Date Published: 15 September 2006
PDF: 6 pages
Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers, 63412H (15 September 2006); doi: 10.1117/12.695504
Show Author Affiliations
Felice Pignatiello, Istituto Nazionale di Ottica Applicata (Italy)
Maurizio De Rosa, Istituto Nazionale di Ottica Applicata (Italy)
Pietro Ferraro, Istituto Nazionale di Ottica Applicata (Italy)
Simonetta Grilli, Istituto Nazionale di Ottica Applicata (Italy)
Sergio De Nicola, Istituto di Cibernetica E. Caianiello, CNR (Italy)
Ady Arie, Tel-Aviv Univ. (Israel)
Paolo De Natale, Istituto Nazionale di Ottica Applicata (Italy)


Published in SPIE Proceedings Vol. 6341:
Speckle06: Speckles, From Grains to Flowers

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