Photorefractive two-wave mixing in tantalum-doped potassium niobate

Anne E. Clement; G. Charmaine Gilbreath

doi:10.1117/12.22859

1 November 1990 Photorefractive two-wave mixing in tantalum-doped potassium niobate

Anne E. Clement, G. Charmaine Gilbreath

Proceedings Volume 1334, Current Developments in Optical Engineering IV; (1990) https://doi.org/10.1117/12.22859
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

Photorefractive gain is measured in poled, 1% tantalum-doped Potassium Niobate (KNbO3). Two-wave mixing experiments are presented which exploit the r42 coefficient of KNbO3 by employing non-symmetric geometries which rotate the grating vector away from the optic axis. The effect of this rotation on the exponential gain coefficient is showr. Experimental results are compared to an analytic expression derived for this parameter. The experiments were performed using an Argon laser stabilized at X=51 4.5 nm. The light was extraordinarily polarized and ihe beams were incident on the b-face of the crystal. The absorption and the response time of the crystal were measured. Losses due to scattering and self-pumped phase conjugation were also investigated.

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Anne E. Clement and G. Charmaine Gilbreath "Photorefractive two-wave mixing in tantalum-doped potassium niobate", Proc. SPIE 1334, Current Developments in Optical Engineering IV, (1 November 1990); https://doi.org/10.1117/12.22859

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KEYWORDS

Crystals

Laser crystals

Phase conjugation

Two wave mixing

Absorption

Laser scattering

Scattering

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