WDM-PON system based on remote node and seed light source

Abstract

The invention discloses a WDM-PON system based on a remote node and a seed light source, and relates to the field of WDM-PONs. The WDM-PON system comprises a local side, a remote node, a distributed optical network and multiple wavelength-adjustable colour light modules at a user side; the remote node comprises a seed light source regeneration module, a WSS-1, a WSS-2 and N optical couplers; the seed light source regeneration module realizes regeneration of the seed light source by filtering; the regenerated seed light source and multiplexed downlink light signals are separately sent to the WSS-1 and the WSS-2; routing of the regenerated seed light source and the downlink light signals is realized; downlink light signals output by the WSS-1 and the WSS-2 are coupled one by one through theoptical couplers, and sent to the distributed optical network; and the multiple colour light modules at the user side receive the downlink light signals, and modulate uplink signals onto the regenerated seed light source. In the WDM-PON system based on the remote node and the seed light source disclosed by the invention, the wavelength-adjustable colour light modules at the user side are simple indesign; an adjustable narrowband optical filter is unnecessary; and the uplink signal transmission quality is ensured.

Description

technical field [0001] The present invention relates to the field of WDM-PON (Wavelength Division Multiplexing Passive Optical Network, wavelength division multiplexing passive optical network), in particular to a WDM-PON system based on remote nodes and seed light sources. Background technique [0002] With the continuous development of the Internet and the emergence of emerging network applications, such as: mobile big data, virtual reality, ultra-high-definition video, etc., the evolution of the Internet network has entered the 5G era. The main characteristics of the services to be provided by the 5G network include high bandwidth, low latency and massive connections. Therefore, higher requirements are placed on the bandwidth, capacity, delay and networking flexibility of the optical transport network. Through the reconfigurable optical add-drop multiplexer and wavelength division multiplexing optical layer technology, the optical fiber transmission capacity can be incre...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: (1) It is difficult to design the user-end filter, and an adjustable narrow-band optical filter is required; (2) From the central office to the user end, the system has a large loss, and the optical signal of the seed light source obtained after filtering Low noise ratio, resulting in poor quality of uplink signal transmission

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