DocumentCode
1071753
Title
Proposal for high extinction ratio LiNbO3 optical waveguide cutoff modulator
Author
Zhu, N.H. ; Pun, E.Y.B. ; Chung, P.S.
Author_Institution
Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong
Volume
142
Issue
5
fYear
1995
fDate
10/1/1995 12:00:00 AM
Firstpage
248
Lastpage
250
Abstract
A novel design of an optical waveguide cutoff modulator is proposed. The attenuation of the guided mode in the optical waveguide is controlled by a voltage applied to the coplanar waveguide electrodes deposited on the top of the optical waveguide. An S-shaped optical waveguide structure with a corresponding curved coplanar waveguide electrode is used to increase the extinction ratio and decrease the radiation loss from the curved waveguide. The performance of the device is analysed using the finite difference beam propagation method. Simulation results show that, at an operating wavelength of 1.3 μm, an extinction ratio of over 30 dB can be achieved with applied voltages of ±10 V
Keywords
electro-optical modulation; electrodes; lithium compounds; optical design techniques; optical losses; optical planar waveguides; optical waveguide components; optical waveguide theory; refractive index; 1.3 mum; 10 V; LiNbO3; LiNbO3 optical waveguide cutoff modulator; S-shaped optical waveguide structure; applied voltages; coplanar waveguide electrodes; curved coplanar waveguide electrode; extinction ratio; finite difference beam propagation method; guided mode; high extinction ratio; operating wavelength; radiation loss; simulation results;
fLanguage
English
Journal_Title
Optoelectronics, IEE Proceedings -
Publisher
iet
ISSN
1350-2433
Type
jour
DOI
10.1049/ip-opt:19952160
Filename
475292
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