GaAs-AlGaAs晶体的电光调制性能模拟计算  

Simulation calculation for electro-optic modulation properties of GaAs-AlGaAs crystals

作　　者：张文芳 刘福华 贺泽民[1] 柳杰 Zhang Wenfang;Liu Fuhua;He Zemin;Liu Jie(School of Science,Xijing University,Xi’an 710123,China)

机构地区：[1]西京学院理学院,陕西西安710123

出　　处：《无线互联科技》2022年第12期137-140,共4页Wireless Internet Technology

基　　金：陕西省教育厅自然科学专项,项目编号:18JK1203。

摘　　要：基于非线性光学中电光效应的信号调制技术能控制和改变光场的相位和强度分布,利用半导体材料的非线性电光效应的外调制技术能够实现高速数据传输。GaAs-AlGaAs是常用的电光调制晶体材料,制备工艺成熟价格低廉。文章分析了电光调制的工作原理,对去除衬底GaAs-AlGaAs的电光调制器有源区的折射率变化以及光强分布等参数进行模拟计算。结果表明:材料折射率及光强分布随外加电场较为均匀,利用该材料制成的电光调制器有望实现低电压调制下的高速数据传输。The signal modulation technology based on electro-optical effect in nonlinear optics can control and change the phase and intensity distribution of the optical field,and the external modula tion technology using the nonlinear electro-optical effect of semiconductor materials can realize high-speed data transmission.GaAs-AlGaAs is a commonly used electro-optical modulation crystal material with mature preparation process and low price.In this paper,we analyze the working principle of electro-optical modulation and simulate the refractive index change and light intensity distribution in the active region of electro-optical modulator with GaAs-AlGaAs removed from the substrate,and the results show that the refractive index and light intensity distribution are more uniform with the applied electric field,and the electro-optical modulator made of this material is expected to realize high-speed data transmission under low-voltage modulation.

关 键 词：电光调制 光波导 折射率分布 光强分布 

分 类 号：TN929.11[电子电信—通信与信息系统]