ROADM add-drop transceiving system, method and terminal based on optical frequency comb

Abstract

Disclosed in an embodiment of the present application are an optical comb based ROADM uplink / downlink transceiving system, terminal and method, the method comprising: passing the signals generated by an uplink optical laser through an uplink carrier device to produce desired uplink carrier signals; after selecting M channels of uplink carrier signals according to uplink control signaling, conducting IQ modulation and carrier combination respectively, and transmitting the uplink carrier signals to a switching node monitoring module; the switching node monitoring module outputs a combined signal, conducts power division, and transmits the signal to a coherent receiver; a downlink optical laser generates signals and passes the signals through a downlink local oscillator device to generate local oscillator signals, and selects N channels of local oscillator signals according to downlink control signaling, and transmits the local oscillator signals to the coherent receiver; the coherent receiver conducts demodulation after receiving power division signals and local oscillator signals; M and N are numbers of channels of signals of an uplink transmitting terminal and a downlink receiving terminal.

Description

technical field [0001] The invention relates to the field of optical fiber communication, in particular to a system, method and terminal for optical comb-based reconfigurable optical add / drop multiplexer (ROADM) for adding and dropping transceivers. Background technique [0002] (1) Variable bandwidth optical network [0003] With the rapid development of the Internet, network data traffic has increased dramatically. On the other hand, new Internet applications have unpredictable bandwidth requirements. These two factors drive the optical network to develop in a flexible, dynamic and efficient direction. In this context, in recent years, the industry has proposed the concept of variable bandwidth optical network, which overcomes the limitations of coarse-grained and fixed grids of traditional WDM optical networks, can dynamically and flexibly allocate bandwidth resources, and can carry from sub-wavelength to Ultra-wavelength-level business requirements have greatly improve...

AI Technical Summary

Problems solved by technology

As a classic ROADM implementation, it requires a large number of semiconductor lasers, IQ modulators, power splitters (PS) and WSS (the connection composition of PS and WSS can be adjusted), which is very costly. A large number of WSSs not only cause complex management and control problems, but also reduce the reliability of the system and affect its large-scale application in optical networks.

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