Experimental studies of proton-exchanged lithium niobate waveguides using cinnamic acid

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

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)662-664
Journal / PublicationApplied Physics Letters
Volume59
Issue number6
Publication statusPublished - 1991
Externally publishedYes

Abstract

Proton-exchanged planar waveguides in z-cut LiNbO3 have been fabricated and characterized optically using cinnamic acid as the new proton source. Single-mode waveguides before and after annealing exhibit propagation losses of 0.81 and 0.33 dB/cm, respectively, measured at 0.633 μm wavelength. The diffusion rate is slower than that of the popular benzoic acid. Post-annealing changes the refractive index profile from a truncated-parabolic function to a step function and then a Gaussian-like profile. The effect of annealing on the surface index change and the waveguide depth increase could be accurately modeled by a power-law relationship.

Citation Format(s)

Experimental studies of proton-exchanged lithium niobate waveguides using cinnamic acid. / Pun, E. Y B; Loi, K. K.; Zhao, S. A.; Chung, P. S.

In: Applied Physics Letters, Vol. 59, No. 6, 1991, p. 662-664.

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