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

  Articoli su Riviste JCR/ISI  (anno 2006)

Autori:  Pignatiello F., De Rosa M., Ferraro P., Grilli S., De Nicola S., Arie A., De Natale P

Affiliazione Autori:  CNR - Istituto Nazionale di Ottica Applicata, Sez. di Napoli, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; Istituto di Cibernetica "E. Caianiello" del CNR, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; Department of Physical Electronics, School of Electrical Engineering, Faculty of Engineering, Tel Aviv University, 69978 Tel Aviv, Israel

Riassunto:  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 degrees 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.

Rivista/Giornale:  PROCEEDINGS OF SPIE
Volume n.:  6341      Pagine da: U540  a: U545
Note:  Congress: Speckle06: Speckles, From Grains to Flowers in Nimes
DOI: 10.1117/12.695504


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