Optical Amplifier Transient Suppression Fast Approximation Device and Method

Abstract

The invention relates to a fast approximating apparatus and method for light amplifier transient suppression. The apparatus comprises an input end parallel sampling circuit, an output end sampling circuit, an analog-to-digital converter, a digital-to-analog converter, a pump laser, an FIFO controller and a PID operation module. Bi-ADC parallel sampling enlarges the effective detection scope. When the input light intensity changes, the two paths of ADC sampling data are spliced to ensure the reality and completeness of the data for calculating modules. PID compensation is determined by detecting input light changing amplitude and output light intensity signals, and the correction of PID integration items can be obtained. Effective suppression for transient characteristics of different up and lower speech path rates in an erbium doped fiber amplifier (EDFA) can be realized, thereby improving the performance of the EDFA, and ensuring the stability and reliability of an entire optical communication system.

Description

technical field [0001] The invention relates to an optical communication device, in particular to an erbium-doped optical fiber amplifier (EDFA), in particular to a device and method capable of effectively suppressing the EDFA transient state during optical switching at different rates. Background technique [0002] In the DWDM system, with the increase of business volume, the number of channels that need to add and drop optical paths is gradually increasing, and the change of the number of channels leads to the change of the input optical power of EDFA, thus producing transient effects. The transient effect of EDFA has important influence on DWDM system. Especially for cascaded EDFAs, transient effects will significantly affect the operation of the system. In the optical communication system, an EDFA is often considered as a node without transmission delay. In the current situation where the channel allocation speed is constantly upgrading, it is believed that the fastest...

AI Technical Summary

Problems solved by technology

At present, the top EDFA equipment manufacturers are optimizing the transient performance of EDFA on the order of rapid channel configuration below 10us, setting various technical thresholds, but the actual effect cannot meet the different needs of the system

[0004] The problem comes from the electrical characteristics of the input and output sampling circuits, the time delay of optical fiber transmission in the module, and the response rate of the control device, which together lead to the fact that the control mode of the device does not fully match the actual system.

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