Apparatus and method for selectively transmitting video business in wavelength division multiplexing passive optical network

Abstract

The invention relates a device and a method for selectively transmitting video services in a wavelength-division multiplex passive optical network, which belongs to the optical communication technical field, the device of the invention is that an output port of a downlink data transmitter is connected with an input port of a video service transmitter, the output port of the video service transmitter is connected with the input port of a second array waveguide grating on a remote node, the output port of the second array waveguide grating is connected to the input port of an optical network unit of a corresponding wavelength communication channel, the output port of the optical network unit is connected with the other input port of the second array waveguide grating, the other output port of the second array waveguide grating is connected with the input port of an uplink data transmitter through fiber transmission, the method of the invention comprises controlling the amplitude modulation signal extinction ratio which is output by a first Mach-Zehnder modulator in the downlink data transmitter to realize transmitting video services dynamically and selectively. The invention has simple structure, low cost, and convenient realizing method, which is convenient for arranging in practical environment.

Description

technical field [0001] The invention relates to a device and method in the technical field of optical communication, in particular to a device and method for selectively transmitting video services in a wavelength division multiplexing passive optical network system. Background technique [0002] Wavelength division multiplexing passive optical network is an emerging optical communication technology. Because of its simple structure, low cost and flexible configuration, it has become the most competitive solution for users to realize broadband access. It utilizes existing low-cost optical devices, can increase system transmission capacity, extend coverage, and provide scalable broadband access services. The traditional WDM passive optical network uses arrayed waveguide gratings to provide virtual point-to-multipoint connections. Various research schemes for point-of-view video services are also proposed. However, in these solutions, these video services will be received by ...

AI Technical Summary

Problems solved by technology

But the disadvantages are: 1. High-speed logic devices are required to generate the reverse return-to-zero code in the electrical domain and switch between the two code types; 2. The receiver structure of the differential phase shift keying code type is complex, which increases the configuration cost of the system

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