Light-source-shared WDM-PON (wavelength division multiplexed passive optical network) system based on suppressed carrier modulation technique
A WDM-PON, carrier suppression technology, applied in the system field of the optical communication technology field, can solve the problems of not further improving the utilization rate of the light source at the OLT end, reducing the power budget of the system, etc., so as to improve the utilization rate of resources, simplify the implementation, and reduce costs. Effect
Active Publication Date: 2015-07-08
SHANGHAI JIAO TONG UNIV SUBEI RES INST
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Problems solved by technology
However, the use of light source and wavelength in this solution is limited to one WDM-PON, which does not further improve the utilization rate of the light source at the OLT end. At the same time, the downlink optical signal needs to be split and transmitted to two groups of ONUs, which reduces the power budget of the system.
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[0028] Such as figure 1 As shown, in this embodiment, the system provided according to the present invention includes: an optical line terminal, a first feeder fiber, a second feeder fiber, a remote node, 2N distributed fibers, and 2N optical network units , Among them, optical network units 1-1, 1-2, ... 1-N belong to WDM-PON1, optical network units 2-1, 2-2, ... 2-N belong to WDM-PON2; the optical line terminal and the first One end of the feeder fiber is connected to one end of the second feeder fiber, the other end of the first feeder fiber and the second feeder fiber is connected to the remote node to transmit downlink data; the remote node is connected to one end of the distributed fiber Connect, transmit the downlink data to each optical network unit, and adopt the cross transmission method, so that the downlink signal and the uplink re-modulation signal of the same WDM-PON are transmitted in different feeder fibers; each optical network unit solution The downstream dat...
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The invention provides a light-source-shared WDM-PON (wavelength division multiplexed passive optical network) system based on the suppressed carrier modulation technique. The system comprises an optical line terminal, two feed-in line optical fibers, a remote node, 2N distributed optical fibers and 2N optical network units, wherein the optical line terminal comprises a shared light source transmitter, two downlink data transmitters, two uplink data receivers and two optical circulators; the remote node comprises two arrayed waveguide gratings, two optical circulators and an interconnected optical fiber; and each optical network unit comprises an optical coupler, a downlink receiver and a reflective semiconductor optical amplifier. The light-source-shared WDM-PON system based on the suppressed carrier modulation technique has the advantages that N laser devices are used for providing downlink light sources and uplink light sources for a pair of WDM-PONs so that network cost is saved, and uplink data and downlink data of each WDM-PON are transmitted in different feed-in line optical fibers so that influences of Rayleigh backscattering on transmission performance are avoided.
Description
Technical field [0001] The invention relates to a system in the field of optical communication technology, in particular to a method for realizing light source sharing in a wavelength division multiplexing passive optical network (WDM-PON) using carrier suppression modulation technology, and specifically relates to a light source based on carrier suppression modulation technology Shared WDM-PON system. Background technique [0002] With the rapid development of information technology, emerging broadband services such as High Definition TV (HDTV), interactive games, large file sharing, video conferencing, etc. continue to emerge and grow, and the broadband and multi-services of the access network are uniformly carried And the transmission capacity puts forward higher requirements. Passive Optical Network (PON) based on optical fiber has been widely used in the field of access network due to its large bandwidth and low cost advantages. [0003] In a traditional Time Division Multip...
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IPC IPC(8): H04J14/02H04Q11/00H04B10/2507
Inventor 周钊肖石林毕美华戚涛冯翰林史杰
Owner SHANGHAI JIAO TONG UNIV SUBEI RES INST