A method and system for identifying the rate of an optical signal

Abstract

The invention relates to a method and system for recognizing the rate of optical signals, and belongs to the field of optical fiber communication. The method includes the steps that after a TDC applies a certain dispersion value to the optical signals with the input rate to be recognized, the output optical signals are amplified by an optical amplifier and then injected into a NPTF generating module, the average power of the signals at the output end of the NPTF generating module is measured by an optical power meter, a digital signal processing module drives the TDC to work in a step scan mode, the scanning range and the step length are scaled according to a same proportion to record the changing curve of the average power of the output signals of the NPTF along with dispersion in the TDC scanning process under a series of different zoom scaling, and the charging curve is matched with the sample curve of the dispersion value of signals with the B rate and the signal average power, then the scaling R which is highest in the matching degree is acquired, the rate to be recognized of the signals works for the method and system without any prior information, the rate is suitable for signals with various modulation formats and rates, and the system for recognizing the rate of the optical signals has the advantages of being simple in structure and high in cost performance.

Description

technical field [0001] The invention relates to the technical fields of optical fiber communication, all-optical signal and digital signal processing. Background technique [0002] With the continuous increase in the demand for communication capacity, fiber optic communication systems have developed rapidly in the past two decades. With the emergence of broadband data services, such as video on demand, Internet protocol TV, multimedia information services, online games, etc., it is necessary to continuously upgrade the existing optical fiber communication network to support these high transmission rate applications. On the other hand, service providers also need to retain some existing low-speed voice and data services. Therefore, the optical fiber communication system needs to support simultaneous transmission of optical signals of multiple rates to meet the needs of different users. In this heterogeneous network, it is more complicated to manage and optimize the network,...

AI Technical Summary

Problems solved by technology

However, it is difficult to implement a counter with a rate higher than Gb / s. It is usually necessary to divide the high-speed signal into a low-speed signal before counting, which is more complicated to implement.

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