Pre-Equalizing Electro-Optic Modulator Utilizing Polarization-Reversed Ferro-Electric Crystal Substrate

Hiroshi MURATA  Tomohiro OHNO  Takayuki MITSUBO  Atsushi SANADA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E101-C   No.7   pp.581-585
Publication Date: 2018/07/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E101.C.581
Type of Manuscript: INVITED PAPER (Special Section on Distinguished Papers in Photonics)
Category: 
Keyword: 
optical modulator,  Pockels effect,  polarization reversal,  impulse response,  equalization,  

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Summary: 
We have proposed and developed new electro-optic modulators for the pre-equalization of signal distortion caused by the optical fiber chromatic dispersion effect. We found that the synthesis of an almost arbitrary impulse response function is obtainable by utilizing an electro-optic modulator composed of a Mach-Zehnder waveguide and travelling-wave electrodes on a ferro-electric material substrate with polarization-reversed structures. In this paper, the operational principle, design and simulation results of the pre-equalization modulator are presented. Some preliminary experimental results are also shown with future prospects.