Analysis of Lithium Niobate Electrooptic Long-Period Waveguide Gratings

Author

Jin, Wei ; Chiang, Kin Seng ; Liu, Qing

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong, China

Volume

28

Issue

10

fYear

2010

fDate

5/15/2010 12:00:00 AM

Firstpage

1477

Lastpage

1484

Abstract

We present an approximate step-index waveguide model for the study of lithium-niobate (LiNbO₃ ) electrooptic (EO) long-period waveguide grating filters. The model takes into account the non-uniform spatial distributions of the EO coefficient and the applied electric field. Using this model, we analyze in detail the effects of the grating and waveguide parameters on the performance of the filter with the objective of identifying a set of optimal design parameters for the realization of an efficient filter. Guided by the results from the analysis, we fabricated a 12-mm-long EO grating, which produced a 24-dB rejection band at a driving voltage of 49 V.

Keywords

diffraction gratings; lithium compounds; optical fabrication; optical waveguides; driving voltage; electric field; electrooptic long-period waveguide gratings; lithium niobate; non-uniform spatial distributions; step-index waveguide model; voltage 49 V; Electrooptic filter; gratings; lithium niobate; long-period gratings; modeling; optical filters; optical waveguides; waveguide filters;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2010.2045155

Filename

5431626