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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 4 — Feb. 1, 2004
  • pp: 940–943

Nonstoichiometric silica mask for fabricating reverse proton-exchanged waveguides in lithium niobate crystals

Antonino Parisi, Alfonso C. Cino, Alessandro C. Busacca, and Stefano Riva-Sanseverino  »View Author Affiliations


Applied Optics, Vol. 43, Issue 4, pp. 940-943 (2004)
http://dx.doi.org/10.1364/AO.43.000940


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Abstract

Producing channel waveguides requires a photolithographic mask, but the standard technique of using thermally evaporated metal films for proton exchange has proved to be unsuitable for withstanding the rather aggressive process of reverse proton exchange. We report the fabrication of a nonstoichiometric silica mask by ion-plating plasma-assisted deposition. This mask is strong enough to resist both direct and reverse proton exchange and is also compatible with anisotropic dry etching for patterning the mask and with electric field poling. Our technique is a practical alternative to the use of SiO2 sputtered masks.

© 2004 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3730) Integrated optics : Lithium niobate
(230.7380) Optical devices : Waveguides, channeled
(310.0310) Thin films : Thin films

History
Original Manuscript: April 16, 2003
Revised Manuscript: September 16, 2003
Published: February 1, 2004

Citation
Antonino Parisi, Alfonso C. Cino, Alessandro C. Busacca, and Stefano Riva-Sanseverino, "Nonstoichiometric silica mask for fabricating reverse proton-exchanged waveguides in lithium niobate crystals," Appl. Opt. 43, 940-943 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-4-940

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