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High Carrier Suppression Double Sideband Modulation Using an Integrated LiNbO3Optical Modulator

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4 Author(s)
T. Kawanishi ; National Institute of Information and Telecommunications Technology, 4-2-1 Nukui-Kita, Koganei, Tokyo, 184-8795, Japan ; T. Sakamoto ; M. Tsuchiya ; M. Izutsu

We proposed high carrier suppression double sideband modulation using a Mach-Zehnder optical modulator with active trimming technique. The modulator has a pair of trimmers in the arms of the Mach-Zehnder structure. The trimmers can compensate amplitude imbalance in the Mach-Zehnder structure due to fabrication error, where the imbalance generates residual carrier in double sideband suppressed carrier (DSB-SC) modulation. We demonstrated high carrier suppression ration of 50dB in DSB-SC modulation at 10.5GHz, by using an integrated Mach Zehnder LiNbO3modulator, where each arm has an intensity trimmer consisting of a sub Mach-Zehnder interferometer.

Published in:

2005 International Topical Meeting on Microwave Photonics

Date of Conference:

12-14 Oct. 2005