Optical signal identifying and detecting method

Abstract

The invention relates to an optical signal identifying and detecting method and device. The method includes the following steps that the wave length reference carrier frequencies fi of all nodes are evenly distributed according to the wave length number m needed by an all-optical network, and reference deviation frequency coefficients delta f are evenly distributed according to the total number n of the nodes, wherein i=1, ..., m; the frequency identification fki of the i optical signal lambda Ki of the node k is modulated to the optical signal lambda ki, wherein fki=fi+ delta f (k-1), and k=1,..., n; the detecting optical signals used for detecting the frequency identification are obtained through light split in the main optical signals of the all-optical network and converted into electric signals, and then the frequency fki of the corresponding optical signal is identified from the electric signals; fi and the delta f (k-1) are obtained through calculation according to fki=fi+ delta f (k-1), so that the optical signals are positioned to the corresponding nodes. The number of usable frequency identification signals is effectively increased to meet the requirement for tracking wave length channels of a transparent all-optical network in the future, and the method is suitable for identifying different wave length paths of the all optical network.

Description

technical field [0001] The invention relates to the technical field of optical communication transmission, in particular to an optical signal identification and detection method. In particular, it refers to the identification modulation and demodulation detection method of optical signals in OTN / WDM transmission system. Background technique [0002] With the development of optical transmission technology, especially ROADM technology, the optical transmission network is developing towards an all-optical cross network, and the network scale is also increasing. Since the optical signal is transmitted in an all-optical mode in the transmission network, the intermediate nodes with no business up and down cannot extract the channel overhead in the optical signal through photoelectric conversion, so they cannot obtain the channel information of the intermediate transparent node. In such a transmission network, real-time monitoring of the trace and performance of wavelength signals...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the available frequency identification of the all-optical network is limited and cannot meet the demand

Images