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Optical communication system having optical amplification function

An optical communication system and optical signal technology, applied in the field of optical communication systems, can solve problems such as cost, time-consuming maintenance, acquisition and setting costs, etc.

Inactive Publication Date: 2006-05-03
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in the above-mentioned structure, since the optical amplifier is used in the optical branch station, it costs money to acquire and install it. In addition, if a failure occurs after installation, the branch station has to be visited, and there is a problem that time-consuming maintenance is required.
[0007] In addition, not only the PON system, but even in the general optical communication system, an optical amplifier is inserted in the optical fiber between the parent station and multiple sub If a failure occurs, it is necessary to go to the installation place of the optical amplifier, and there is a problem that it takes time to maintain

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  • Optical communication system having optical amplification function
  • Optical communication system having optical amplification function
  • Optical communication system having optical amplification function

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Embodiment Construction

[0063] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0064] A. Optical communication system

[0065] figure 1 It is a block diagram showing an optical communication system having an optical amplification function according to the present invention. The structural part of the optical communication system in the station is called the 'master station', and the structural part of the optical communication system in the relay station is called the 'substation'. The optical communication system includes a master station 1, a substation 5, an optical branch station 6, and a subscriber home 7. The master station 1 and the substation 5 are connected by an optical fiber 2. Fiber 2 uses a single-mode fiber.

[0066] The downlink transmission signal from the main station 1 to the substation 5 and the uplink transmission signal from the substation 5 to the main station 1 are respectively constituted by a packet method. ...

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Abstract

In the optical communication between the master station and the slave station, the wavelength of the signal laser light source (high LD) of the master station that generates the downlink signal is set to have a Raman amplification effect on the uplink optical signal propagating in the optical fiber (2) wavelength. In the optical fiber (2), during the propagation of the uplink optical signal from the substation to the master station in the optical fiber (2), the uplink optical signal is amplified by the downlink signal light passing through the signal laser light source (high LD) .

Description

technical field [0001] The invention relates to an optical communication system connected by optical fibers between a parent station and a sub station. [0002] In the optical communication system, the present invention particularly relates to the PON ( Passive Optical Network; passive optical network) system. Background technique [0003] In a system that uses an optical data communication network for two-way communication between a master station and a plurality of slave stations, a network structure in which the master station and each slave station are radially connected by a single optical fiber has been put into practical use (SingleStar). In this network structure, the system and equipment structure are simple, but each substation occupies one optical fiber, so it is difficult to realize the low price of the system. [0004] Therefore, a PON (Passive Optical Network) system (also called PDS (Passive Double Star)) in which multiple substations share one optical fiber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35H01S3/10H01S3/30H04B10/291
Inventor 矢田胜启
Owner SUMITOMO ELECTRIC IND LTD