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低损耗、高消光比的Z切钛扩散铌酸锂调制器(英文)

A Z-cut Ti : LiNbO₃ Mach-Zehnder modulator with low loss and high extinction ratio

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【Author】 ZHANG Fu-wen , CHEN Fu-shen , QIU Kun , XUE Fei ( Key Laboratory of Broadband Optic Fiber Transmission and Communication Networks, University of Electronic Science and Technology, Chengdu 610054, China )

【机构】电子科技大学宽带光纤传输与通信系统技术重点实验室；电子科技大学宽带光纤传输与通信系统技术重点实验室四川成都610054；四川成都610054；四川成都610054；

【摘要】为了获得低损耗、高消光比的光波导电光调制器,以钛扩散铌酸锂( Ti: LiNbO3 )波导折射率的分布和光波导的优化设计为基础,利用有限差分光束传播法( FD-BPM )和点匹配法,从理论上给出了一种光损耗为-0.53dB、消光比为30dB的Z切钛扩散铌酸锂调制器。并且,在10Gbit/s的系统中对其进行了测试,取得了在120 km长的光纤上传输无误码的效果和较清晰的眼图。更多还原

【Abstract】 In order to obtain optical waveguide modulator with low loss and high extinction ratio, based on the refraction index distribution of a Ti : LiNbO3 waveguide and optimization design of the optical waveguide, a Z-cut Ti : LiNbO3 modulator with -0.53dB optical loss and 30dB extinction ratio is given theoretically by using finite-difference beam propagation method (FD-BPM) and point-matching method. A test has been carried out in a 10Gbit/s system. A clear eye diagram without error code can be transmitted in an optical fiber 120 km long.更多还原