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Intelligent type double channel optical fiber amplifier for metropolitan area network

An optical fiber amplifier and intelligent technology, applied in the coupling of optical waveguide, electromagnetic wave transmission system, electrical components, etc., can solve the problems of lack of flexibility, insufficient optical power, utilization, etc., and achieve the effect of reducing costs

Inactive Publication Date: 2006-05-31
GUANGXUN SCI & TECH WUHAN
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  • Application Information

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Problems solved by technology

It has been heard that one pump light source supports more than two sets of doped optical fibers at the same time, but the optical power resources of the pump light source in the above design are fixedly allocated to two directions or different channels, which lacks flexibility and the optical Power is often not fully utilized

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  • Intelligent type double channel optical fiber amplifier for metropolitan area network
  • Intelligent type double channel optical fiber amplifier for metropolitan area network
  • Intelligent type double channel optical fiber amplifier for metropolitan area network

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Embodiment Construction

[0024] Aiming at the requirements of MAN for EDFA, we designed an intelligent dual-channel EDFA, whose main structure is as follows: image 3 As shown, the intelligent dual-channel optical fiber amplifier suitable for the metropolitan area network mainly includes a pump source, an erbium-doped fiber, a wavelength division multiplexer, and an isolator. It only uses a pump light source and a tunable optical power splitter The optical power of the pump source is distributed to two sets of erbium-doped optical fibers as required, and the length and concentration of the two sets of erbium-doped optical fibers are optimized according to the pre-amplifier and post-amplifier respectively. The control circuit controls the light splitting ratio of the pump source and the size of the pump power according to the 5% monitoring signal obtained by the detector from the input and output couplers respectively.

[0025] Two feasible tunable optical power dividers such as Figure 4 , Figure 5...

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Abstract

This invention provides an intelligence two-channel optical fiber amplifier suitable for city network which needs only one pump source. It is to assign the light power of pump source to multiple group of erbium-doped fiber by tunable light power distribution unit and the control circuit is to control the resolution ration and power of the pump source according to monitor signals of light detector of input or output ends of each circuit. A polarized beam splitter and a polarized rotation unit realize the tunable light power distribution unit. When emitting light projects on one polarized beam splitter, the two ends of polarized light power is actually controlled by polarized rotation unit. And the tunable light power distribution unit can be the one based on step motor driven reflection ratio changing metal film.

Description

technical field [0001] The invention relates to an intelligent dual-channel optical fiber amplifier suitable for a metropolitan area network, belonging to the technical field of optical fiber amplifiers. Especially suitable for metropolitan area network DWDM (dense wavelength division multiplexing) system and CWDM (coarse wavelength division multiplexing) system. Background technique [0002] Erbium-doped fiber amplifier EDFA and (Dense Wavelength Division Multiplexer) DWDM are the two most important technologies that have made brilliant achievements in the optical fiber communication industry in recent years. For long-distance point-to-point communication, EDFA+DWDM not only doubles the capacity due to wavelength multiplexing, but also replaces the individual OEO (optical→electrical→optical conversion) relay of each channel by directly amplifying simultaneous optical signals, thus greatly reducing the unit cost. The cost of bandwidth. As the construction of long-distance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/28H04B10/17H04J14/02H04B10/291
Inventor 刘文
Owner GUANGXUN SCI & TECH WUHAN