Title :
BPM design optimization and experimental improvement of a Ti:LiNbO 3 ridge waveguide linear-mode confinement modulator
Author :
Sekerka-Bajbus, Michael A. ; Yip, Gar Lam ; Goto, Nobuo
Author_Institution :
Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada
fDate :
11/1/1990 12:00:00 AM
Abstract :
A theoretical device model for a ridge waveguide mode confinement modulator on z-cut LiNbO3, based on the beam propagation method (BPM), is used for design improvement purposes. Following this design technique, a fabricated device yielded a much improved performance of 97% modulation depth with a drive voltage of only ±8 V, in good agreement with the design calculations. The improvement in the experimental performance of this modulator is mainly due to a reduced buffer layer thickness and an optimization of the ridge height. A theoretical analysis based on an accurate effective-index model combined with the BPM is used to predict the performance of the device
Keywords :
lithium compounds; optical modulation; optical waveguide theory; optical waveguides; titanium; LiNbO3:Ti; Ti:LiNbO3 ridge waveguide linear-mode confinement modulator; accurate effective-index model; beam propagation method design optimization; buffer layer thickness; design calculations; design technique; drive voltage; fabricated device; modulation depth; ridge height; theoretical device model; Design optimization; Intensity modulation; Optical buffering; Optical fiber communication; Optical modulation; Optical waveguides; Phase modulation; Slabs; Voltage; Waveguide theory;
Journal_Title :
Lightwave Technology, Journal of
