共线声光模式转换效率的分析与计算

基金项目:

国家自然科学基金资助项目

详细信息

Analysis and numerical calculation of mode conversion efficiencyin collinear acoustooptic interaction

School of Optic electronic Information, University of Electronic Science and Technology, Chengdu, 610054

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。
- 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
Abstract: 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.
- collinear acoustooptic interaction /
- mode conversion efficiency /
- coupled mode theory /
- PE：LiNbO3 wave-guide

[1]	Marcuse D,Theory of dielectric optical wave guides.New York:Academic Press,1991:134～147.
[2]	Pesrov D V.J Opt Commun,1985,6:90～99.
[3]	Nishiara H,Haruna M,Suhara T.Optical integrated circuits.New York:McCraw-Hill Press,1989:62～95.
[4]	徐介平.声光器件的原理,设计和应用.北京:科学出版社,1982:224～242.
[5]	Press W H,Teukolsky S A,Vetterling W T et al.The art of scientific computing.London:Cambridge University Press,1992:340～376.
[6]	Bielb E M,Russel P.IEEE Trans Ultrason Ferroelect Freq Contr,1992,39:330～334.
[7]	Tsai C S,Li Q,Chang C L.J Fiber-Integrated-Opt,1998,17:157～166.

张浩，马宇，章海锋，杨靖，刘佳轩. 一种带宽展宽的等离子体超材料吸波体的设计. 激光技术. 2019(02): 256-262 .

本站查看