Title :
Modeling and optimization of low chirp LiNbO3 Mach-Zehnder modulators with an inverted ferroelectric domain section
Author :
Courjal, Nadege ; Porte, Henri ; Hauden, J. ; Mollier, P. ; Grossard, N.
Author_Institution :
Lab. d´´Opt. P.M. Duffieux, Univ. de Franche Comte, Besancon, France
fDate :
5/1/2004 12:00:00 AM
Abstract :
Domain inversion under coplanar waveguide electrodes is proposed to improve the frequency-chirping behavior of Z-cut LiNbO3 Mach-Zehnder modulators. This is achieved by introducing a phase reversal electrode section in tandem with inverted ferroelectric domains. The method opens the way to broad-band single-drive modulators with predetermined chirp parameter. The experimental results obtained at 10 Gb/s confirm the possibility of lowering the chirp parameter of a Z-cut modulator, while keeping a halfwave voltage lower than 5 V.
Keywords :
chirp modulation; electric domains; electro-optical modulation; electrodes; ferroelectric devices; lithium compounds; optical communication equipment; optical planar waveguides; 10 Gbit/s; LiNbO3; Z-cut LiNbO3 Mach-Zehnder modulators; Z-cut modulator; broadband single-drive modulators; chirp modulation; chirp parameter; coplanar waveguide electrodes; domain inversion; frequency chirping behavior; halfwave voltage; inverted ferroelectric domain section; low-chirp LiNbO3 Mach-Zehnder modulators; phase reversal electrode section; Amplitude modulation; Chirp modulation; Coplanar waveguides; Electrodes; Electrooptic modulators; Ferroelectric materials; Optical distortion; Optical modulation; Optical waveguides; Phase modulation; Chirp modulation; electrooptic modulation; ferroelectric domain inversion; lithium niobate;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2004.826385
