低阈值极化电压玻璃光波导电光效应的研究(英文)  

Electro-optic Effect of Glass Waveguides with Lower Threshold of Poling Conditions

作　　者：张立平[1] 

机构地区：[1]齐齐哈尔医学院医学技术学院,黑龙江齐齐哈尔161006

出　　处：《光子学报》2012年第4期394-398,共5页Acta Photonica Sinica

基　　金：The National Natural Science Foundation of China(No.60867002);the Science and Technology Bureau Foundation of Qiqihar

摘　　要：采用热极化技术对掺锗玻璃条形光波导进行极化,通过光纤连接(单模)的Mach ZehnderInterferometer系统测量条形波导内诱导出的电光效应,系统地研究了大气环境下极化条件(极化温度、极化时间、极化电压)对电光效应的影响.结果表明:在最佳极化条件下(406℃、-2.4kV、20min),波导内的电光系数为rTM=0.059±0.001pm/V,rTE=0.053±0.001pm/V,且波导结构中存在一个较低的阈值极化电压(100V)和阈值极化温度(80℃),此时在波导样品内仍能被激发出可观察的电光效应;实验还发现采用负极化诱导方式产生的电光系数较正极化提高15%左右.Silicon-based channel waveguides are poled by thermal poling.A fiber-based (single mode) Maeh- Zehnder interferometer is utilized to measure the linear electro-optic effect.Poling conditions (poling temperature,poling time,poling voltage) are optimized in air environment.The results show that,the electro-optic coefficient is rTM =0.059±0.001 pm/V,rTE =0.053±0.001 pm/V at the optimized conditions (-2.4 kV,406℃,20 min).At the same time,the waveguide has a lower threshold of poling voltage and poling temperature.An effective electrooptic signal can be observed when poling voltage drops to about 100 V or poling temperature drops to about 80℃.The results also suggest that the electro-optic coefficient increases of 15％ at negative poling than positive poling.

关 键 词：条形波导 热极化 电光效应 光波导 玻璃 

分 类 号：TN256[电子电信—物理电子学]