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提出了一种实用的基于光纤光栅和光学环形器的密集波分复用解复用器，并对其进行了系统的实验研究。实验结果表明，该器件在０．３ｎｍ的通道间隔下，串话小于－１５ｄＢ，适合于密集波分复用。该器件还具有结构简单、通道扩展方便等特点。
A practical DWDM demultiplexer based on fiber grating and optical circulator is proposed and its experimental research is carried out systematically. Experimental results show that the device at channel spacing of 0.3nm, crosstalk less than-15dB, suitable for dense wavelength division multiplexing. The device also has a simple structure, channel expansion and other convenient features.