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

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

Inactive Publication Date: 2015-04-01
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 realizing low-cost local area network service transmission for wavelength division multiplexing optical access network
  • System and method for realizing low-cost local area network service transmission for wavelength division multiplexing optical access network

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment one: see figure 1 , the WDM optical access network realizes the system of low-cost local area network service transmission, the optical line terminal (OLT) (10) connects a remote node RN (30) through a feeder optical fiber (20), and the remote node The RN (30) is connected to N optical network units ONU (50) through a distribution fiber (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 N array waveguide grating AWG (14), a second 1 N array waveguide grating AWG (15), a third 1 N array waveguide grating AWG (16), a phase modulator PM (17), a first optical circulator (18), a first coarse wavelength division multiplexer (19), in the optical line terminal (OLT) ( 10), N optical signal transmitters (11) are connected to the first 1 N arrayed waveguide grating AWG (14) first 1 The output of the N arrayed w...

Embodiment 2

[0031] see figure 1 , figure 2 In the system shown, the specific method of realizing the system WDM optical access network to realize the transmission of low-cost local area network services is as follows: using the above-mentioned system to transmit the broadcasting services, first

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

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

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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 through a wavelength division multiplexing optical access network. Background technique [0002] The WDM-PON technology of wavelength division multiplexing passive optical network can upgrade the bandwidth without changing the physical infrastructure equipment, greatly improve the transmission capacity of the network, and realize virtual point-to-point transmission. security. The mutual communication between each optical network unit ONU has become a research hotspot for realizing broadcast service transmission in reducing the communication load of the optical line terminal (OLT). However, the existing optical line terminal (OLT) uses a laser with a specific wavelength as the light source of the LAN service, which makes the cost of high-speed transmission of the LAN service between ONUs relati...

Claims

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Application Information

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Patent Type & Authority Applications(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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