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Monitoring device for gain characteristic of Er-doped fibre-optical amplifier

An amplifier gain, erbium-doped fiber technology, applied in instruments, optics, light guides, etc., can solve the problems of increased bit error rate at the receiving end, unbalanced channel gain, limited non-relay jumper distance, etc., and achieves high responsivity. Effect

Inactive Publication Date: 2005-01-05
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

The main disadvantage is that the gain curve is not flat enough within the working bandwidth, so that the gains of each channel are unbalanced, which not only limits the distance without repeaters, but also increases the bit error rate at the receiving end

Method used

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  • Monitoring device for gain characteristic of Er-doped fibre-optical amplifier
  • Monitoring device for gain characteristic of Er-doped fibre-optical amplifier
  • Monitoring device for gain characteristic of Er-doped fibre-optical amplifier

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Embodiment Construction

[0032] see first image 3 , image 3It is a schematic diagram of the monitoring device for the gain characteristic of the erbium-doped fiber amplifier of the present invention, which includes an optical fiber 2 with a long-period fiber grating 31 and a biconical optical fiber 1 with a uniform waist 32, on a flat plate 3 provided with an arc-shaped block 34 , the shape of the arc-shaped block 34 is consistent with the shape of the tapered waist of the biconical optical fiber 1, and the waist of the bi-tapered optical fiber 1 closely fits the arc-shaped block 34 and is fixedly placed. The optical fiber 2 is placed on the flat plate 3 close to the double-tapered optical fiber 1, and the cladding of the two optical fibers is close to each other; the whole structure is packaged in a constant temperature rectangular box, and the output ports of the two optical fibers drawn from the rectangular box are connected respectively. A connector 5 and 6.

[0033] The specific preparation m...

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Abstract

The invention is a supervising device for erbium-doped amplifier gain character, it includes a fiber with long period fiber grating and bipyramid type fiber with even waist, one a flat board with arc block, the shape of the arc block and the shape of the cone waist of the bipyramid type fiber, the waist part of the bipyramid fiber attaches to the arc block tightly, the mentioned fiber with long period grating supporting to the flat board, the packaging layers of the two fibers attaches tightly; the whole structure is sealed in a rectangular box with constant temperature, the two output ends of the fiber leaded from the box are connected to connectors.

Description

Technical field: [0001] The invention relates to an erbium-doped optical fiber amplifier, in particular to a monitoring device for the gain characteristic of the erbium-doped optical fiber amplifier, which is mainly used for on-line monitoring and utilizing a long-period optical fiber grating as a flat gain characteristic. Background technique: [0002] Erbium-doped fiber amplifier (hereinafter referred to as EDFA) is one of the core devices in the optical fiber communication system. Its appearance has greatly improved the non-relay distance of the optical transmission system, made the optical relay very simple, and promoted the wavelength division multiplexing. System (WDM) development. [0003] The main advantage of EDFA is that the working band is consistent with the communication band, the coupling loss with the optical fiber line is low, the stability is good, it has full transparency for different modulation rate transmission signals and can realize two-way amplificati...

Claims

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Application Information

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IPC IPC(8): G02F1/39H04B10/291
Inventor 罗爱平高侃黄锐瞿荣辉方祖捷
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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