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System and method for low-cost local area network service transmission in wavelength division multiplexing optical access network

A technology of service transmission and coarse wavelength division multiplexer, applied in the field of low-cost local area network service transmission, can solve the problem of high cost of high-speed transmission local area network service

Inactive Publication Date: 2018-05-01
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing optical line terminal (OLT) uses lasers with specific wavelengths as the light source for LAN services, which makes the high-speed transmission of LAN services between optical network units (ONUs) more costly

Method used

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  • System and method for low-cost local area network service transmission in wavelength division multiplexing optical access network
  • System and method for low-cost local area network service transmission in wavelength division multiplexing optical access network

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1: see figure 1 , this wavelength division multiplexing optical access network realizes low-cost local area network service transmission system, an optical line terminal (OLT) (10) is connected to a remote node RN (30) through a feeder fiber (20), and the remote node The RN (30) is connected to the N optical network units ONUs (50) through distribution fibers (40).

[0027] see figure 1 , the optical line terminal (OLT) (10) is composed of N optical signal transmitters (11), N distributed feedback lasers DFB (12), N optical signal receivers (13), a first 1 A ×N arrayed waveguide grating AWG (14), a second 1×N arrayed waveguide grating AWG (15), a third 1×N arrayed waveguide grating AWG (16), a phase modulator PM (17), a first an optical circulator (18), a first coarse wavelength division multiplexer (19), and in an optical line terminal (OLT) (10), N optical signal transmitters (11) are connected to the first 1×N array The output of the first 1×N arrayed wave...

Embodiment 2

[0031] see figure 1 , figure 2 In the system shown, the specific method for realizing the system wavelength division multiplexing optical access network to realize low-cost local area network service transmission is: using the above system to transmit broadcast services;

[0032] First, N optical carriers are generated at N distributed feedback lasers DFB ( 12 ) located in the optical line terminal (OLT) ( 10 ). After that, the N channels of optical carriers are wavelength-multiplexed by the second 1×N arrayed waveguide grating AWG (15), and the multiplexed signal is connected to the phase modulator PM (17) for modulation of the broadcast signal, and the optical signal carrying the broadcast information After being multiplexed by a first optical circulator (18) and a first coarse wavelength division multiplexer (19), it is transmitted to a remote node RN (30) through a feeder fiber (20);

[0033] In the remote node RN (30), the broadcast signal in the feeder fiber (20) ...

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Abstract

The invention discloses a system and a method for realizing low-cost local area network service transmission for a wavelength division multiplexing optical access network. According to the system, an optical line terminal (OLT) is connected with a remote node RN through a feeder line optical fiber to form a tree-shaped network; the remote node RN is connected with an optical network unit ONU through a distributed optical fiber; the optical line terminal comprises N optical signal transmitters, N distributed feedback lasers DFB, N optical signal receivers, three 1*N array waveguide gratings AWG, a phase modulator PM, three optical circulators, a coarse wavelength division multiplexer, a waveband block WB, an optical isolator, N*N array waveguide gratings AWG and N optical network units ONU; each optical network unit ONU comprises two coarse wavelength division multiplexers, an optical circulator, an optical divider, three optical signal receivers, a reflective semiconductor optical amplifier RSOA, an electro absorption modulator EAM and a wideband light source BLS. Through the structural design of the RN end array waveguide gratings and the ONU end wideband light source, high-speed transmission of low-cost local area network service can be effectively realized in the wavelength division multiplexing optical access network (WDM-OAN).

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a system and method for realizing low-cost local area network service transmission by a wavelength division multiplexing optical access network. Background technique [0002] The wavelength division multiplexing passive optical network WDM-PON technology can upgrade the bandwidth without changing the physical infrastructure, greatly improve the transmission capacity of the network, and realize virtual point-to-point transmission. security. The mutual communication between the ONUs of each optical network unit reduces the communication load of the optical line terminal (OLT) and the WDM-PON of the wavelength division multiplexing passive optical network has become a research focus for realizing broadcast service transmission. However, the existing optical line terminal (OLT) uses a laser with a specific wavelength as the light source of the local area network service, which m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/02H04Q11/00
Inventor 冯晨甘朝钦郭苏高子越
Owner SHANGHAI UNIV
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