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Optical network unit (ONU), based on directly-modulated laser, of coherent passive optical network (PON) system and signal receiving method thereof

A technology of signal receiving and coherent receiver, applied in the ONU field of coherent PON system, to achieve the effect of small size, large power budget and low production cost

Active Publication Date: 2016-05-04
WUHAN POST & TELECOMM RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects existing in the prior art, the technical problem solved by the present invention is: reduce the production cost and power consumption of the coherent ONU, overcome the influence of the frequency jitter and phase noise of the local light source on the signal quality

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  • Optical network unit (ONU), based on directly-modulated laser, of coherent passive optical network (PON) system and signal receiving method thereof
  • Optical network unit (ONU), based on directly-modulated laser, of coherent passive optical network (PON) system and signal receiving method thereof
  • Optical network unit (ONU), based on directly-modulated laser, of coherent passive optical network (PON) system and signal receiving method thereof

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0028] see figure 1 As shown, the ONU of the coherent PON system based on the direct modulated laser in the embodiment of the present invention includes DML (DirectModulatedLaser, direct modulated laser), power splitter, coherent receiver, signal sampling processor and signal recovery processor, power distribution The receiver is provided with an uplink signal output terminal and a light source output terminal, and the coherent receiver is provided with a downlink signal input terminal and a light source input terminal.

[0029] The input end of the DML is connected to the power divider, the light source output end of the power divider is connected to the light source input end of the coherent receiver, and the output end of the coherent receiver is connected to the signal recovery processor through the signal sampling processor.

[0030] The...

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Abstract

The invention discloses an ONU, based on a directly-modulated laser, of a coherent PON system and a signal receiving method thereof, and relates to the ONU filed in the coherent PON system. A power divider of the ONU is provided with an uplink signal output end and a light source output end. A coherent receiver is provided with a downlink signal input end and a light source input end. An input end of the DML is connected with the power divider. The light source output end of the power divider is connected with the light source input end of the coherent receiver. An output end of the coherent receiver is connected with a signal recovery processor through a signal sampling processor. According to the invention, the manufacturing cost and power of the coherent ONU are lowered, and the influences of frequency jitter and phase noise of a local light source on signal quality are prevented. The advantages of the coherent passive optical network such as a large power budget, a high access speed and flexible channels are maintained, and the ONU of the coherent PON system is suitable for popularization.

Description

technical field [0001] The present invention relates to the field of ONU (Optical Network Unit, Optical Network Unit) in a coherent PON (Passive Optical Network, passive optical network) system, in particular to an ONU of a coherent PON system based on a directly modulated laser and a signal receiving method thereof. Background technique [0002] PON is a pure media network. The PON system based on coherent detection has the advantages of large power budget, high access rate, and flexible and adjustable channels. An important part of a coherent PON system is a coherent ONU, and the cost of a coherent ONU is a key factor determining the success or failure of a coherent PON system. [0003] At present, the specific structure of the coherent ONU used in the coherent PON system has not been obtained. To realize the specific structure of the coherent ONU, it needs to be realized by a coherent receiver in the transmission network, and its production cost is relatively high. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/25H04B10/27H04B10/66H04B10/079H04Q11/00
CPCH04B10/07955H04B10/25891H04B10/27H04B10/66H04Q11/0067
Inventor 胡荣孟令恒李淼峰杨奇
Owner WUHAN POST & TELECOMM RES INST CO LTD
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