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Wavelength-division multiplexing passive optical network system with 1:N wavelength backup function

A passive optical network and wavelength division multiplexing technology, which is applied in electromagnetic wave transmission systems, transmission systems, optical fiber transmission, etc., can solve the problems of high price and high modulation rate of wavelength tunable lasers

Active Publication Date: 2013-06-26
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Claims
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Problems solved by technology

The disadvantage of this scheme is that the wavelength tunable laser used is expensive, and it also requires the wavelength tunable laser to have a wide wavelength tuning range and a high modulation rate

Method used

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  • Wavelength-division multiplexing passive optical network system with 1:N wavelength backup function
  • Wavelength-division multiplexing passive optical network system with 1:N wavelength backup function

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0035] FIG. 1 is a schematic structural diagram of 1:N wavelength backup in a WDM-PON system implemented according to the present invention. As shown in Figure 1, the WDM-PON system with 1:N wavelength backup function mainly includes an optical network unit (ONU) 120, a remote node (RN) 110, a central office (CO) 100, and a wavelength located in the central office 100. backup unit 106 . As shown in FIG. 1 , the central office (CO) 100 is responsible for providing inter-network optical interfaces and related switching tasks, providing data transmission for the optical network unit (ONU) 120 and managing and monitoring the data information from the optical network unit. The central office (CO) 100 connects the remote node ...

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Abstract

The invention provides a wavelength-division multiplexing passive optical network system with 1:N wavelength backup function, which comprises an optical network unit, a remote node and a central office used for performing bidirectional optical fiber communication with the optical network unit. The system can reduce the maintenance difficulty of the system and minimize the cost of the system by replacing a great number of DFB lasers and expensive wavelength tunable lasers by an injection locked Fabry-Perot laser.

Description

technical field [0001] The present invention relates to a wavelength division multiplexed passive optical network (WDM-PON) system, specifically utilizing the upload light of an optical network unit (ONU) to perform injection locking on a Fabry-Perot laser to realize a central office (CO)1 : WDM-PON system with N wavelength backup. Background technique [0002] With the development of network technology and the emergence of various high-bandwidth services, the optical fiber access network, especially the passive optical network (PON) has become a research hotspot in the field of optical communication. Among them, WDM-PON represents the development direction of passive optical network in the future, and has irreplaceable advantages. [0003] A typical WDM-PON is mainly composed of a central office (CO), a remote node (RN) and an optical network unit (ONU). The central office mainly includes devices such as multi-wavelength optical transmitting units, optical receivers, and ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/032H04B10/572H04B10/25
Inventor 韩威祝宁华谢亮王欣袁海庆
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI