DWDM系统光通道性能在线监控模块

In-line optical performance monitors for DWDM systems

基于密集波分复用(DWDM)的光传送网构成了整个通信网络的基础物理层。为了满足DWDM技术的应用和升级,能够进行在线监测的光通道性能模块成为当前很多光器件公司研究和开发的热点。一个典型的在线光性能监测(OPM)模块能够在线监测通道光功率、中心波长及光信噪比(OSNR)等指标。文章系统地阐述了OPM的应用背景、技术特点、性能指标以及发展前景,并对各厂家生产的OPM模块进行了比较分析。

Optical transmission networks based on Dense Wavelength Division Multiplexing （DWDM） system make up the physical layer of the whole telecommunication system. To fit the demands for the system application and development, researching and producing OPM （ In-line optical performance monitor） becomes a hot-spot in many device-supply corporations recently. A typical OPM can monitor the parameters of channel optical power, center wavelength and Optical Signal-Noise Ratio （OSNR） and so on. In this article, the application background, technical characteristics, performance and future development are discussed.