Modeling and optimization of low chirp LiNbO/sub 3/ Mach-Zehnder modulators with an inverted ferroelectric domain section

Modeling and optimization of low chirp LiNbO/sub 3/ Mach-Zehnder modulators with an inverted ferroelectric domain section

Domain inversion under coplanar waveguide electrodes is proposed to improve the frequency-chirping behavior of Z-cut LiNbO/sub 3/ 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 bro...

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Bibliographic Details
Published in:Journal of lightwave technology Vol. 22; no. 5; pp. 1338 - 1343
Main Authors: Courjal, N., Porte, H., Hauden, J., Mollier, P., Grossard, N.
Format: Journal Article
Language:English
Published: IEEE 01-05-2004
Subjects:
Amplitude modulation
Chirp modulation
Coplanar waveguides
Electrodes
Electrooptic modulators
Ferroelectric materials
Optical distortion
Optical modulation
Optical waveguides
Phase modulation
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Summary:Domain inversion under coplanar waveguide electrodes is proposed to improve the frequency-chirping behavior of Z-cut LiNbO/sub 3/ 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.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2004.826385