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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 18, Iss. 8 — Apr. 15, 1993
  • pp: 577–579

Two-wave mixing in photorefractive ion-implanted KNbO3 planar waveguides at visible and near-infrared wavelengths

M. Zha, D. Fluck, P. Günter, M. Fleuster, and Ch. Buchal  »View Author Affiliations


Optics Letters, Vol. 18, Issue 8, pp. 577-579 (1993)
http://dx.doi.org/10.1364/OL.18.000577


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Abstract

We report what is to our knowledge the first observation and characterization of the photorefractive effect in ion-implanted KNbO3 waveguides. The implantation was performed with 2.6-MeV He ions at a dose of 7.5 × 1014 cm−2. We measured two-wave-mixing gains of ~8 and ~2 cm−1 at wavelengths of 514.5 and 810 nm, respectively, and grating buildup times in the visible and the near infrared of typically 40 μs at a power level of 10 mW. Electrons are found to be the dominant charge carriers, implying that the gain direction is reversed in the waveguide as compared with that of the bulk crystal.

© 1993 Optical Society of America

History
Original Manuscript: October 20, 1992
Published: April 15, 1993

Citation
M. Zha, M. Fleuster, Ch. Buchal, D. Fluck, and P. Günter, "Two-wave mixing in photorefractive ion-implanted KNbO3 planar waveguides at visible and near-infrared wavelengths," Opt. Lett. 18, 577-579 (1993)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-18-8-577

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