物理学报Issue(3)：173-179,7.DOI:10.7498/aps.62.034208
光纤布拉格光栅型全光纤声光调制器的特性研究
Characteristics of the fiber Bragg grating based all-fiber acousto-optic modulator∗
摘要
Abstract
The Fourier mode coupling theory is applied to the analysis of the fiber Bragg grating based all-fiber acousto-optic modulator for the first time. Compared with the existing analysis methods, the algorithm of this model is simple and easy, and transmission characteristics of the modulator can be acquired effectively and efficiently. Based on the theory, the performances of the modulator, related to ultrasonic frequency and amplitude of acoustically induced strain, are investigated. Simulation results show that in reflection spectra of the modulator, the wavelength interval between the primary relection peak and the secondary relection peak is proportional to ultrasonic frequency, and the reflectivity of the reflection peak varies periodically with intensity change of the amplitude of acoustically induced strain. In addition, with the same amplitude of acoustically induced strain, more secondary reflections exist in the low-frequency ultrasonic modulated fiber Bragg grating, and the periodic variation of the energy reflected by fiber Bragg graing is more obvious. In the experiment, the fiber Bragg graing is modulated by an ultrasonic wave with a frequency of 885.5 KHz. The experimental results accord well with the simulation results.关键词
声光调制/光纤布拉格光栅/傅里叶模式耦合理论/光谱特性Key words
acousto-optic modulation/fiber Bragg grating/Fourier mode coupling theory/spectral characteristics引用本文复制引用
刘超,裴丽†,李卓轩,宁提纲,高嵩,康泽新,孙将..光纤布拉格光栅型全光纤声光调制器的特性研究[J].物理学报,2013,(3):173-179,7.基金项目
国家自然科学基金(批准号:11174192)资助的课题 （批准号:11174192）
