【摘要】 以TeO2声光可调谐滤波器(AOTF)的工作原理为基础,根据光通信中光插分复用器件的性能要求,利用Matlab计算软件,从动量匹配、晶体旋光性、器件带宽和共线4方面对其光声入射角进行分析.结果表明:在满足动量匹配的前提下,考虑晶体旋光性时,光入射角工作在4°～25°和60°～90°内;器件线宽小于1nm;在400nm的通频带内光入射角应大于31°,否则调谐范围下降.此外,对光通信TeO2器件,应选择非共线工作.更多还原

【Abstract】 On the basis of TeO₂ acousto-optic tunable filters（AOTF） working principles and the requirements of the performance of the optical add/drop multiplexer（OADM） in optical communication, the choice of the incident angles of the optical and acoustic beams of the TeO₂ acousto-optic tunable filters is considered from the four aspects of the momentum-match, the optical rotation, the bandwidth and the collinear beam with Matlab program. The conclusions are that an optical incident angle works in the range of 4°～25° and 60°～90° in consideration of the optical rotation; and in order to make bandwidth smaller than 1 nm within the tunable range of 400 nm, it should be larger than 31° at least, otherwise the tuning range comes down; and it is necessary for the devices in optical communication to choose the non-collinear working mode when the momentum-match of the two incident angles is satisfied at first.更多还原