Proton-Exchanged Optical Waveguides in Z-cut LiNb03 Using Phosphoric Acid

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

19 Scopus Citations
View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)277-284
Journal / PublicationJournal of Lightwave Technology
Volume11
Issue number2
Publication statusPublished - Feb 1993
Externally publishedYes

Abstract

Proton-exchanged z-cut LiNbO3 planar waveguides formed using phosphoric acid were characterized optically. The refractive index profile and the diffusion parameters were studied systematically. These waveguides have propagation losses less than 1 dB/cm, and exhibit properties which are different from those obtained using the popular benzoic acid. The index profile is not a simple step function, and can be modelled accurately by a polynomial expression. A maximum surface index increase of 0.145 was measured at 0.633-μm wavelength. The diffusion constant Do and the activation energy Q for the proton-exchange process using this acid were found to be 6.43 x 108 μm2/h and 82.91 kj/mol, respectively. The annealing properties of these waveguides were also established, and the effects of annealing on surface index change and waveguide depth increase were found to follow a power-law relationship. © 1993 IEEE

Citation Format(s)

Proton-Exchanged Optical Waveguides in Z-cut LiNb03 Using Phosphoric Acid. / Pun, Edwin Y. B.; Kwong Loi, Kwok; Chung, Po Shuen.

In: Journal of Lightwave Technology, Vol. 11, No. 2, 02.1993, p. 277-284.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review