体波光纤声电光调制器  

Bulk-wave Fiber Acousto-electro-optic Modulator

作　　者：俞宽新[1] 庞兆广[1] 何士雅[1] 蒋安恩[1] 郭明江[1] 范瑜晛[1] 

机构地区：[1]北京工业大学应用数理学院,北京100022

出　　处：《压电与声光》2004年第5期360-363,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目 ( 60 0 770 17) ;北京市教委项目 ( P0 60 40 10 1)

摘　　要：在体波光纤声光器件中使用了电光效应 ,制作出一种新型的体波光纤声电光调制器。这种器件附加了一个信息输入端口 ,使得器件在使用中更具有灵活性。并且可以使器件的中心频率通过所加的直流电压来改变 ,该器件在光纤通信领域内有应用前景。该文从声光效应的耦合波方程出发 ,给出了声电光衍射效率的计算公式 ,并用铌酸锂晶体设计制作了体波光纤声电光调制器进行验证 ,测试了其相对衍射效率分别随电信号功率和直流电压变化的曲线 。Based on the bulk-wave fiber acousto-optic (AO) device, a new type of bulk-wave fiber acousto-electro-optic (AEO) modulator is made. This device has an additive input end of information, with much flexibility in use. Its center frequency can be changed by direct current voltage. The modulator is useful in optic fiber communication. In this paper, a formula of diffraction efficiency of the AEO effect is given from a coupled-wave equation of AO effect, and is verified by a bulk-wave fiber AEO modulator with Lithium Niobate (LN) crystal. Some curves of relative diffraction efficiency vs power of electric signals driving transducer and direct current voltages driving electrode are given respectively. The experiment results are agree with the theory.

关 键 词：体波 光纤 声电光效应 调制器 

分 类 号：TN65[电子电信—电路与系统]