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Erbium doped optical fibre light amplifier

An erbium-doped optical fiber and optical amplifier technology, applied in the field of optical communication transmission, can solve the problems of high cost, large noise figure, polarization sensitivity, etc.

Inactive Publication Date: 2007-05-23
HUAWEI TECH CO LTD
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  • Summary
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  • Description
  • Claims
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Problems solved by technology

SOA has the advantages of small size and high integration, but it has the disadvantage of large noise figure and polarization sensitivity. In addition, the nonlinear phenomenon of SOA seriously brings many application restrictions.
FRA is generally used in long-distance transmission systems, and the cost is high

Method used

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  • Erbium doped optical fibre light amplifier
  • Erbium doped optical fibre light amplifier
  • Erbium doped optical fibre light amplifier

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Embodiment Construction

[0014] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0015] The optical circuit shown in Figure 1 includes: two optical signal input terminals 1 and 2; input couplers 3 and 4; input optical detectors 5 and 6; input isolator 7 is a 2-in-1 array optical isolator, Equivalent to two independent input isolators; input multiplexers 8 and 9, the pump light and signal light are coupled into the erbium-doped fiber through the multiplexer to amplify the signal; the 50 / 50 splitter 10 will The pumping light sent by the pump laser 11 is divided into two halves, which are respectively connected to the multiplexer 8 and the multiplexer 9 to combine with two independent signals and enter the erbium fibers 12 and 13 to amplify the signals; the output isolator 14 is also an equivalent 2-in-1 array optical isolator with two independent output isolators; output couplers 15 and 16; output detectors ...

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Abstract

An Er-doped optical fibre amplifier is composed of a pumping laser for pumping two channels of optical amplifying system, a 50 / 50 splitter for dividing the pumped light into two halves, and 4 low-reflectivity optical fibre rasters for gain locking. Its advantages are high independency between two channels, automatic locking of gain, high integrated level and low cost.

Description

technical field [0001] The invention relates to the field of optical communication transmission, in particular to an erbium-doped optical fiber amplifier. technical background [0002] In the metropolitan ring network, the distance between adjacent sites is generally relatively short, and the line loss to be compensated is relatively small. Therefore, the requirements for the gain of optical amplifiers are generally not high, and they need to be configured in pairs. Currently conventional optical amplifiers include Erbium-doped Fiber Amplifier (EDFA), Semiconductor Optical Amplifier (SOA), Raman Distributed Amplifier (FRA) and so on. [0003] At present, EDFA is the most widely used one with the best performance. The minimum power of the pump laser used by EDFA is generally above 80mW, so the gain provided by EDFA often far exceeds the actual demand of the metropolitan ring network. SOA has the advantages of small size and high integration, but it has the disadvantage of l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/12H04B10/291
Inventor 刘鸿祁芳
Owner HUAWEI TECH CO LTD
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