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Multi-band rare-earth doped optical fibre amplifier

A fiber amplifier and rare earth doping technology, which is applied in optics, instruments, nonlinear optics, etc., can solve the problem that the bandwidth is less than full-wave optical fiber, etc., and achieve the effect of full utilization

Inactive Publication Date: 2003-02-19
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the maximum flat bandwidth of the fiber amplifier invented at present is only 120nm, and its bandwidth is less than one-third of the available bandwidth of the full-wave optical fiber.

Method used

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  • Multi-band rare-earth doped optical fibre amplifier
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  • Multi-band rare-earth doped optical fibre amplifier

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Embodiment Construction

[0014] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] In this embodiment, the structure of the multi-band rare earth doped fiber amplifier is as follows figure 1 As shown, it includes three signal transmission and amplification arms, a pair of waveband multiplexer / demultiplexer (WBMU / WBDMU), three rare earth ion-doped fiber amplifiers, a gain flattening filter (GFF) and a pair of input and output Isolator (ISO). The three transmission and amplification arms respectively use erbium-doped glass fiber, thulium-doped glass fiber, and praseodymium-doped glass fiber as gain media, and are bidirectionally pumped by semiconductor lasers. The three rare earth ion-doped fiber amplifiers are erbium-doped fiber amplifier (EDFA), thulium-doped fiber amplifier (TDFA) and praseodymium-doped fiber amplifier (PDFA). Among the three signal transmission and amplification arms, one amplifica...

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Abstract

A multi-band optical fibre amplifier doped by Er, Tm, or Pr is composed of 3 signal transmission and amplifying arms for 1280-1400 nm, 1400-1530 nm and 1530-1620 nm, a pair of band multiplexer / demultiplexer, 3 optical fibre amplifiers doped respectively by Er, Tm and Pr, and gain-flat filter and a pair of I / O isolators. Its advantages are low loss and wide bendwidth (340 nm).

Description

Technical field: [0001] The invention relates to a multi-band rare earth doped optical fiber amplifier, which is suitable for optical fiber communication systems and networks. Background technique: [0002] In recent years, due to its outstanding advantages, dense wavelength division multiplexing (DWDM) technology has been highly valued by experts and scholars. It can effectively use the bandwidth of optical fibers to achieve large-capacity, long-distance optical fiber communications, and can increase business in user distribution systems. quantity. In the application of these DWDM technologies, in order to realize multi-wavelength and ultra-long-distance transmission, larger bandwidth and cascading of multiple amplifiers are required. Compared with semiconductor optical amplifiers, rare earth-doped fiber amplifiers with increasingly mature technology have high gain, wide bandwidth, low noise, gain characteristics are insensitive to optical polarization state, transparent t...

Claims

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Application Information

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IPC IPC(8): G02F1/39H04B10/291
Inventor 姜淳胡卫生曾庆剂
Owner SHANGHAI JIAO TONG UNIV