High-Speed LiTaO3 Optical Polarization Modulator Using Traveling-Wave Electrode and Double Periodic Poling Structure

Hiroshi MURATA  Asuka TAKAHASHI  Yasuyuki OKAMURA 

Publication
IEICE TRANSACTIONS on Electronics  Vol.E92-C  No.2  pp.212-216
Publication Date: 2009/02/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Advances in Integrated Photonic Devices)
Category: 
Keyword: 
polarization modulation,  lithium tantalate (LiTaO3),  optical waveguide,  traveling-wave modulation,  polarization reversal, 

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Summary: 
A new LiTaO3 electro-optic polarization modulator utilizing traveling-wave electrodes and a double periodic poling structure is proposed. Utilizing the double periodic poling structure, both quasi-phase matching between TE and TM guided-modes, and quasi-velocity matching between a lightwave and a modulation microwave are obtainable at modulation frequencies over 10 GHz.