Multi-wavelength multicast device and method in wavelength division multiplexing passive optical network

Abstract

The invention discloses a multi-wavelength multicast apparatus and method in a wavelength division multiplexing passive optical network (WDM-PON) and relates to the technical field of passive optical networks. The multi-wavelength multicast apparatus comprises three switches, five adjustable OBPFs, two adjustable continuous optical pumping lasers TL1 and TL2, a SOA, two EDFAs, three PCs, a 3*1 OC, and two 4*1OCs. After passing a switch, an adjustable OBPF, an EDFA, and a PC, an optical switch as well as continuous light generated by the TL1 and the TL2 passes the 3*1 OC to enter the SOA in a coupled manner. Each of the TL1 and the TL2 is connected with the corresponding PC. An optical signal output by the SOA passes an EDFA and a 1*4 OC. Each output end of the 1*4 OC is connected with the corresponding OBPF and the outputs of the four OBPFs are output in a coupled manner via the corresponding 4*1 OC so as to be used as the output of the multi-wavelength multicast apparatus. The multi-wavelength multicast apparatus achieves WDM-PON multi-wavelength multicast, has characteristics of energy conservation, fast multicast service response, and high network resource utilization efficiency, and supports WDM-PON high-speed, real-time, and highly-efficient multicast service.

Description

technical field [0001] The invention relates to the technical field of passive optical network (PON), in particular to a method for multi-wavelength multicast in wavelength division multiplexing passive optical network (WDM-PON). Background technique [0002] Passive optical network (PON) is considered to be a good solution to the "last mile" problem. Wavelength Division Multiplexing Passive Optical Network (WDM-PON) system has become the first choice for the next generation access network because of its high bandwidth, simple implementation and easy upgrade. The WDM-PON system allocates a separate wavelength for each user, so that each user or each optical network unit (ONU) can exclusively enjoy bandwidth services. And the transmission of WDM-PON has nothing to do with the protocol and bit rate, so it supports the transmission of any business or even mixed business. WDM-PON can upgrade the bandwidth without changing the physical infrastructure. Because of this advantage...

AI Technical Summary

Problems solved by technology

[0008] The problem to be solved by the present invention is: to overcome the shortcomings of the existing wavelength division multiplexing passive optical network (WDM-PON) electric domain multicast technology to realize redundancy, complexity and high cost requirements, and propose a method to realize WDM-PON direct Multiwavelength Multicast Technology for Multicast in Optical Domain

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