论文部分内容阅读
波分复用器（ＷＤＭ）作为光纤通信中一种重要的元器件，能够在不改变原有通信线路的条件下，有效地增加光纤通信的容量。传统的波分复用器主要基于色散原理，分光比不能准确控制，信号间串音大；而基于平面波导中多模干涉效应研制的波分复用器，具有体积小，损耗低（＜０５ｄＢ），不受光偏振态的影响，易集成等优点；在很宽的工作波长范围内，受环境变化影响小，适合现代通信器件集成化的发展。利用多模干涉效应（ＭＭＩ）集成的０９８μｍ／１５５μｍ波分复用器，波导长度仅几个毫米，分光比例准确，隔离度可达３０－４０ｄＢ，波形失真小，它不仅可用于１５５μｍ光纤激光器和ＥＤＦＡ的集成，也可用于实现１×Ｎ和Ｎ×Ｎ分光，在光纤通信中有广泛的应用前景。
As an important component of optical fiber communication, WDM can effectively increase the capacity of optical fiber communication without changing the original communication line. The traditional wavelength division multiplexer is mainly based on the principle of dispersion, the splitting ratio can not be accurately controlled, and the crosstalk between signals is large. The wavelength division multiplexer based on the multimode interference effect in a planar waveguide has the advantages of small volume, low loss (<0 ⑤ 5dB), not affected by the polarization state of light, easy to integrate, etc .; in a wide range of operating wavelength, subject to small changes in the environment, suitable for the development of modern communications devices integrated. Using the multimode interference effect (MMI) integrated 098μm / 155μm wavelength division multiplexer, waveguide length of only a few millimeters, accurate spectral ratio, isolation of up to 30-40dB, waveform distortion is small, it can be used not only The integration of 155μm fiber laser with EDFA can also be used to realize 1 × N and N × N splitting. It has wide application prospect in optical fiber communication.