摘要
在理论分析设计的基础上，进行了ＧａＡｓ／ＧａＡｌＡｓ定向耦合器型行波调制器实验。建立了器件行波电极微波特性的测试系统，由此系统进行实验确定器件最佳结构参数，完成器件的制作。器件采用共平面行波电极，击穿电压２８Ｖ。用１．０６μｍＹＡＧ激光器进行测试，开关电压８．５Ｖ。由微波网络分析仪测试器件行波电极的微波特性，测得电极中微波与波导中光波间的速率失配小于３％，且在３０ＧＨｚ下，微波传输损耗小于３０ｄＢ。
The experiments on the GaAs/GaAlAs traveling wave directional coupler optical modulator are done. With aid of a system for measuring the microwave chararcteristics of the traveling wave electrode. Then the paramenter of the modified structure of the device are determined and the traveling wave optical modulator is fabricated and measured. The coplanar traveling wave electrode is used in this device and the measured breakdown voltage is 28 V. Under the measure system with 1.06 μm YAG laser, the switch voltage of 8.5 V is obtained. The velocity mismatching between the microwave, measured by the network analyzer, and the lightwave in the waveguide of the device is less than 3% and the microwave transmission loss is less than 10 dB/cm at 30 GHz which indicates the 3 dB optical modulation bandwidth of the traveling-wave modulator is greater than 32 GHz.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1997年第6期782-785,共4页
Acta Optica Sinica
基金
国家自然科学基金
863高技术资助
关键词
光波导调制器
集成光学
砷化镓
镓铝砷
GaAs/GaAlAs, optical waveguide modulator, integrated optics.
