摘要
利用声表面波共线声光效应的衍射光栅可使波导中导模向泄漏模转换 ,此现象在光通信在线解复用系统具有潜在应用前景。利用耦合模理论求解这一过程 ,模式转换效率可以化作声波频率、声光作用长度、波导厚度和声波功率密度的函数 ,利用数值计算得出结果并给出其关系。由数值计算结果可知 ,x切质子交换铌酸锂波导模式转换效率最大 ,适当选择波导长度和声驱动功率密度 ,其TE0 →TMυ 转换效率可达 90 %以上。
The guided to leaky mode conversion with the induced diffraction grating from the collinear surface acoustic wave (SAW) possess potential application in onboard optical demultiplexing of optic communication systems. This phenomenon is analyzed using the coupled mode theory. Mode conversion efficiency has been calculated as functions of acoustic frequency,interaction length,guiding layer thickness,and acoustic drive power density. It is shown that the x cut configuration features the highest mode conversion efficiency,measured mode conversion efficiency as high as 90% is obtained at the relevant acoustic drive power density and interaction length.
出处
《激光技术》
CAS
CSCD
北大核心
2003年第5期411-414,共4页
Laser Technology
基金
国家自然科学基金资助项目
关键词
共线声光效应
模式转换效率
耦合模理论
质子交换铌酸锂波导
collinear acoustooptic interaction
mode conversion efficiency
coupled mode theory
PE∶LiNbO 3 wave guide
