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Phase-modulated temperature scanning interferometry for measurements of electrooptic coefficients: application to KTiOPO4

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4 Author(s)
Mangin, J. ; Phys. Lab., Burgundy Univ., Dijon, France ; Gadret, G. ; Fossier, S. ; Strimer, P.

This work describes an efficient and simple method to determine the effective electrooptic coefficients of crystals, along with the continuous recording of their temperature dependence. A sample with plane and parallel optical end faces acts as a Fabry-Pe´rot resonator, which is submitted to a linear ramp of temperature. The thermooptic effect generates a shift of interference fringes that are phase-modulated by applying an appropriate electric field. Residual absorption of the material is considered to achieve the best accuracy. The case of KTiOPO4 is given as an example to illustrate the method; first results on the thermal behavior of its effective coefficients ri3 are presented.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:41 ,  Issue: 7 )