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Optics Letters

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  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 16 — Aug. 15, 2007
  • pp: 2294–2296

Optical damage control via the Fe 2 + Fe 3 + ratio in proton-exchanged LiNbO 3 waveguides

J. Carnicero, M. Carrascosa, A. Mendez, A. García-Cabañes, and J. M. Cabrera  »View Author Affiliations


Optics Letters, Vol. 32, Issue 16, pp. 2294-2296 (2007)
http://dx.doi.org/10.1364/OL.32.002294


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Abstract

Intensity thresholds for the onset of optical damage in α-phase proton-exchanged waveguides on undoped LiNbO 3 have been increased from the substrate value to a factor 500 greater. This has been achieved by increasing the exchange time, which in turn increases the [ Fe 2 + ] [ Fe 3 + ] ratio in the guide. Intensity thresholds have been measured with a single-beam configuration, while [ Fe 2 + ] [ Fe 3 + ] ratios have been determined from decay measurements during optical erasure of photorefractive gratings. In heavily Fe-doped guides, thresholds are too small to be measured, but the dependence of the Fe 2 + absorption on the exchange time appears similar to undoped samples.

© 2007 Optical Society of America

OCIS Codes
(130.3730) Integrated optics : Lithium niobate
(190.5330) Nonlinear optics : Photorefractive optics
(230.7370) Optical devices : Waveguides

ToC Category:
Nonlinear Optics

History
Original Manuscript: June 20, 2007
Manuscript Accepted: June 30, 2007
Published: August 2, 2007

Citation
J. Carnicero, M. Carrascosa, A. Mendez, A. García-Cabañes, and J. M. Cabrera, "Optical damage control via the Fe2+/Fe3+ ratio in proton-exchanged LiNbO3 waveguides," Opt. Lett. 32, 2294-2296 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-16-2294


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