Title :
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
fDate :
5/15/2010 12:00:00 AM
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;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2010.2045155
