铌酸锂M-Z电光强度调制器光辐射模研究

Study on the Radiation Modes Light of the Lithium Niobate Electric-optical Intensity Modulator with M-Z Optical WaveguideZHENG Shuaifeng, LIU Baichang, TIAN Zijun, LI Miaomiao, HUA Yong

摘要:

铌酸锂M-Z电光强度调制器光辐射模与光纤耦合是导致芯片与光纤组件耦合失效的主要问题,本文采用光纤与芯片高精度耦合扫描法对光波导和光辐射模进行扫描,研究了光辐射模中心位置分布,光辐射模输出光功率随偏置电压变化特性,以及光辐射模、光波导与光纤耦合光能量分布特性。测得光波导有效耦合区域X、Y方向范围分别为14~15.5μm和14~16μm,光辐射模有效耦合区域X、Y方向范围分别为89~92μm和92~96μm。利用所研究的光辐射模特性,制定了失效耦合的解决方案,解决了光辐射模耦合失效问题。

Abstract:

The radiation modes light radiated from M-Z optical waveguide may couple with the fiber, it’s the main factor to make failure of high-precision coupling between the chip and the fiber array. It used fiber to scan the waveguide and radiation modes light with high-precision coupling method, studied the center position of the radiation modes light regions, the characteristics of radiation modes light power changed with the bias voltage, and the power distribution characteristics of waveguide and radiation modes light scanned by the fiber. The effective coupling range of the waveguide in X and Y directions are 14~15.5μm and 14~16μm respectively, and the effective coupling range of the radiation modes light in X and Y directions are 89~92μm and 92~96μm respectively. It used the studied characteristics of the radiation modes light to formulate the corrected solution of the coupling failure, and solved the coupling failure caused by the radiation modes light.