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Proceedings Paper

Ultrabroadband LiNbO3 electro-optic modulators with novel complex electrode
Author(s): Boyu Wu; Jinghua Gu; Jinyang Hu; Shuyun Luo; Jihu M. Peng
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Paper Abstract

The characterization of Z-cut LiNbO3 optical modulators with novel complex electrode are discussed by using the finite-element method (FEM) and studied experimentally in this paper. The calculation results show that the configuration of the electrode can realize microwave-optical velocity match easily and reduce microwave electrode losses drastically, so the modulators with such electrode are candidate devices for future ultra-high-speed optical fiber transmission systems. The traveling wave electrode consists of upper and lower parts. Because the thickness of the hot electrode can be thicker, the microwave attenuation coefficient of the traveling-wave electrode (alpha) 0 is able to be less than 0.35 dB/(cm GHz1/2). The configurations of the electrode are optimized by criteria of the ratio of 3dB optical bandwidth to drive power. The results of optimization show that the properties of the modulators can be improved by increasing the electrode gaps. An electro-optic modulator with bandwidth 100 GHz, half wave voltage 6V is designed. The modulator is being fabricated in our laboratory. Some experimental results of the traveling- wave electrode are obtained. The characteristic of low microwave transmission loss of the electrode is demonstrated. The attenuation coefficient (alpha) 0 measured by microwave network analyzer is as low as 0.35 dB/(cm GHz1/2).

Paper Details

Date Published: 19 June 1998
PDF: 7 pages
Proc. SPIE 3420, Optical Fiber Communication, (19 June 1998); doi: 10.1117/12.312873
Show Author Affiliations
Boyu Wu, Tsinghua Univ. (China)
Jinghua Gu, Tsinghua Univ. (China)
Jinyang Hu, Tsinghua Univ. (China)
Shuyun Luo, Tsinghua Univ. (China)
Jihu M. Peng, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 3420:
Optical Fiber Communication
Winston I. Way; Franklin F. Tong; Alan Eli Willner, Editor(s)

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