质子交换LiNbO_3波导调制器多模截止波长的测试技术研究  

Research for Measuring the Multi-Mode Cut-Off Wavelength of LiNbO_3 Waveguide Modulator Fabricated by Proton Exchange

作　　者：张广[1] 陈抱雪[1,2] 傅长松[1] 隋国荣[1] 王关德[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093 [2]上海理工大学上海市现代光学系统重点实验室,上海200093

出　　处：《光学学报》2011年第11期185-189,共5页Acta Optica Sinica

基　　金：国家自然科学基金(61077042;60677032);上海市重点实验室建设项目(08DZ2272800);上海市重点学科项目(S30502)资助课题

摘　　要：提出并实验了一种采用倒置输入的结构来测定Y分支LiNbO3波导相位调制器的多模截止波长的新方法,模式耦合分析表明,倒置输入的Y分支波导的多模传输的输出功率具有随波长变动发生振荡的特征,该特征可用于定量判定多模截止波长。方法的有效性得到了波束传播法(BPM)仿真和样品实验两方面的验证。An inverted structure of Y-branch LiNb03 waveguide for measuring the multi-mode cut-off wavelength ofthe phase modulator is proposed and experimented. Analysis of the mode coupling shows that the output power of the inverted Y-branch waveguide is cyclical fluctuated with the wavelength when the waveguide is in multi-mode. Andthis characteristics can be used to judge the multi-mode cut-off wavelength. The validity of the method has been verified by simulation and experiment with sample.

关 键 词：导波光学 光纤陀螺 Y分支LiNbO3波导 多模截止波长 

分 类 号：O436[机械工程—光学工程]