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Millimeter-wave Ti:LiNbO3 optical modulators

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3 Author(s)
Noguchi, K. ; NTT Opto-Electron. Labs., Kanagawa, Japan ; Mitomi, O. ; Miyazawa, H.

The design, fabrication, and characteristics of ridged Ti:LiNbO 3 optical modulators that work in the millimeter-wave region are presented. A new concept of design under velocity matching is demonstrated for the proposed modulator. It has been shown by calculation that impedance matching is achieved and conductor loss is greatly reduced under velocity matching with wider gaps and a thicker coplanar waveguide electrode in conjunction with a ridge structure. Two types of Mach-Zehnder optical intensity modulators for the wavelength of 1.5 μm are developed. A fully packaged module for 40 Gb/s transmission with a half-wave voltage of 3.5 V and a broadband modulator responsible up to 100 GHz with a half-wave voltage of 5.1 V

Published in:

Lightwave Technology, Journal of  (Volume:16 ,  Issue: 4 )