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Optics Letters

Optics Letters

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  • Vol. 22, Iss. 16 — Aug. 15, 1997
  • pp: 1214–1216

Tunable ultraviolet radiation by second-harmonic generation in periodically poled lithium tantalate

J.-P. Meyn and M. M. Fejer  »View Author Affiliations


Optics Letters, Vol. 22, Issue 16, pp. 1214-1216 (1997)
http://dx.doi.org/10.1364/OL.22.001214


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Abstract

We describe electric-field poling of fine-pitch ferroelectric domain gratings in lithium tantalate and characterization of nonlinear-optical properties by single-pass quasi-phase-matched second-harmonic generation (QPM SHG). With a 7.5-µm-period grating, the observed effective nonlinear coefficient for first-order QPM SHG of 532-nm radiation is 9 pm/V, whereas for a grating with a 2.625-µm period, 2.6 pm/V was observed for second-order QPM SHG of 325-nm radiation. These values are 100% and 55% of the theoretically expected values, respectively. We derive a temperature-dependent Sellmeier equation for lithium tantalate that is valid deeper into the UV than currently available results, based on temperature-tuning experiments at different QPM grating periods combined with refractive-index data in the literature.

© 1997 Optical Society of America

Citation
J.-P. Meyn and M. M. Fejer, "Tunable ultraviolet radiation by second-harmonic generation in periodically poled lithium tantalate," Opt. Lett. 22, 1214-1216 (1997)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-22-16-1214

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