In the paper the electric controlled optical tunable filter as a MOEMS device based on the FP resonant cavity on silicon, which will be potentially used in the dense wavelength division multiplexing (DWDM) system, is introduced. It can be used mainly as a wavelength division multiplexer in a DWDM system, and can be used as a optical add-drop multiplexer (OADM) in an all-optical switch system. Its basic operation principle is that one of the two mirrors is made into an elastic membrane structure, then the cavity length is varied under the driving of the electric field force, and the wavelength tuning be realized. The parameters of its characters, the working principle and the basic structure of the device are analyzed and calculated, including the optical properties, for instance, the tunable spectral range, the 3 dB bandwidth, the finesse, and the insertion loss, the structural properties, for instance, the deformation of the elastic membrane under the electric field force, the mechanics property and the couple performance, for instance, the electromechanical couple between the membrane of the FP cavity and the applied electric field. According to the required performances of the device and the subsystem, the preliminary design is performed combining the technique condition. From the analyzed results, the advantages of minuteness volume, low insertion loss, and high adjustment precision are clearly known.

The acousto-optic tunable filter (AOTF) for wavelength division multiplexing (WDM) applications has attracted much attention. The important reason is that it may realize the multi-wavelength optical cross-connect. This enables the AOTF to become a promising optical component in the future intelligent optical communication networks. The TeO2 AOTF has a specific structure with the capability of both functions of wavelength division and space division. This feature will lead to TeO2 AOTF's lower crosstalk. In this paper, the coupling equations with multiple acoustic waves traveling simultaneously are presented. The analytic solution of the diffraction efficiency for the two acoustic frequencies is given, and its impact on the device performances is analyzed. The crosstalk of the TeO2 AOTF as an OADM in WDM system is discussed, which shows that it is superior to the IAOTF on crosstalk.

The Integrated acousto-optic tunable filter have the potential to perform the OADM or OXC functions, which play significant role in WDM optical network. The characteristic of the acousto-optic mode conversion is sinc2-like functions with high sidelobe intrinsic. The high sidelobe level lead to serious crosstalk in the WDM optical network. The theory of weighted coupling for IAOTF has been presented. And the filter response using four suggested weighted functions has been calculated with the matrix methods. Significant suppression of sidelobe level has been achieved by employing the techniques of weighted coupling. It is a valid approach to reduce the sidelobe of IAOTF by chosing propriety weighted function and a realized way.

本文以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、器件带宽和共线状况四个方面对其光和声的入射角选择进行了分析，得到结论为：在两入射角满足动量匹配的基本前提下，考虑晶体旋光性时，光入射角最好工作在40-250和600-900的范围内；考虑器件线宽时，若使其小于1nm，光入射角在400nm的通频带内应大于310，否则调谐范围将有所下降，此外对光通信TeO2器件选择非共线工作是必要的。