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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 20, Iss. 1 — Jan. 1, 2002
  • pp: 71–

LiNbO3 Optical Waveguides Formed in aNew Proton Source

Vittorio M. N. Passaro, Mario N. Armenise, Diana Nesheva, Ivanka T. Savatinova, and Edwin Y. B. Pun

Journal of Lightwave Technology, Vol. 20, Issue 1, pp. 71- (2002)


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Abstract

Proton-exchanged planar waveguides have been fabricated on Z-cut and X-cut lithium niobate crystals by using a new proton source formed by a mixture of benzoic and adipic acids. Waveguide index profiles and optical characteristics have been obtained at different values of the adipic-benzoic acid concentration ratio. The samples have been structurally characterized by Raman and infrared (IR) absorption spectroscopy and double-crystal X-ray diffraction. Good quality samples have been fabricated by using 30 mol% ratio dilution, showing very low scattering levels (<0.1 dB/cm), relatively high electrooptic coefficient (r33 = 0.88 pm/V), and low relative percentage of interstitial protons (26%). The main factor limiting the waveguide optical properties is the substitutional-interstitial proton ratio, which can be easily controlled to produce good quality waveguides. A demonstration of the repeatability of the exchange process in the acid mixture is also provided.

[IEEE ]

Citation
Vittorio M. N. Passaro, Mario N. Armenise, Diana Nesheva, Ivanka T. Savatinova, and Edwin Y. B. Pun, "LiNbO3 Optical Waveguides Formed in aNew Proton Source," J. Lightwave Technol. 20, 71- (2002)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-20-1-71

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