光纤熔锥耦合器的声光强度调制特性

摘要

对光纤熔锥方向耦合器的声光强度调制特性进行了实验研究。得到了工作波长为1310nm,声波频率为20.19kHz，电驱动功率为2.6mW,插入损耗为0.5dB，调制深度为64%的声光强度调制特性。%Based on couple-modes theory and Acoustic optic effect,we analysis the mode copupling between the LP01 and LP11 modes by a traveling acoustic flexural wave guided along the narrow waist of taped coupler experimentally.A single-mode fiber acoustic-optic intensity modulation based on taped coupler is demonstrated at a wavelength of 1310nm.About 64%modulation is achieved at a modulation frequency of 20.19kHz with the drive power of about 2.6mW.