Novel Electro-Optical Modulator Utilizing GeO_2-Doped Silica Waveguide  

作　　者：李九生 贾大功 

机构地区：[1]Institute of Laser and Opto-Electronics,School of Precision Instrument and Opto-Electronics Engineering,Tianjin University [2]Key Laboratory of Opto-Electronics Information and Technical Science of Ministry of Education,Tianjin University

出　　处：《Transactions of Tianjin University》2009年第3期222-224,共3页天津大学学报（英文版）

基　　金：Supported by National Natural Science Foundation of China (No.60577023);Key Laboratory of Opto-Electronics Information and Technical Science of Ministry of Education,China

摘　　要：In order to achieve a modulator with broad bandwidth and perfect impedance match,a novel electro-optical modulator based on GeO2-doped silica waveguides on silicon substrate is designed.The finite element model of the whole electro-optical modulator is established by means of ANSYS.With the finite element method analysis,the performance of the novel modulator is predicted.The simulation reveals that the designed modulator operates with a product of 3 dB optical bandwidth and modulating length of 226.59 GHz·cm,and a characteristic impedance of 51.6 Ω at 1 550 nm wavelength.Moreover,the calculated electrical reflected power of coplanar waveguide electrode is below-20 dB in the frequency ranging from 45 MHz to 65 GHz.Therefore,the designed modulator has wide modulation bandwidth and perfect impedance match.In order to achieve a modulator with broad bandwidth and perfect impedance match, a novel electro-optical modulator based on GeO2 -doped silica waveguides on silicon substrate is designed. The finite element model of the whole electro-optical modulator is established by means of ANSYS. With the finite element method analysis, the performance of the novel modulator is predicted. The simulation reveals that the designed modulator operates with a product of 3 dB optical bandwidth and modulating length of 226.59 GHz.cm, and a characteristic impedance of 51.6 Ω at 1 550 nm wave- length. Moreover, the calculated electrical reflected power of coplanar waveguide electrode is below -20 dB in the fre- quency ranging from 45 MHz to 65 GHz. Therefore, the designed modulator has wide modulation bandwidth and perfect impedance match.

关 键 词：optical modulator GeO2-doped silica finite element method 

分 类 号：TN814[电子电信—信息与通信工程]