Reman optical fibre amplifier with dynamic gain wave control

A Raman fiber, gain fiber technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of gain spectral line fluctuation, destroying optimization conditions, and uncertainty, reducing fluctuation factors, wide bandwidth, and avoiding chirp Effect

Inactive Publication Date: 2004-02-04
FUDAN UNIV +1
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Problems solved by technology

The greater the number of components, the worse the overall stability of the fiber amplifier, and the more difficult it is to estimate the impact of the instability of a certain component on the overall performance due to environmental reasons
A simple example is the uncertain drift of one or several pump laser wavelengths due to environmental changes. Although this drift is small (less than 2nm according to the existing technical indicators), it is enough to destroy the original optimization conditions. , making the original smooth gain spectrum fluctuate
Moreover, this fluctuation is dynamic and undeterminable

Method used

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  • Reman optical fibre amplifier with dynamic gain wave control
  • Reman optical fibre amplifier with dynamic gain wave control
  • Reman optical fibre amplifier with dynamic gain wave control

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Embodiment Construction

[0044] See first figure 1 , figure 1It is a simplified structural diagram of the Raman fiber amplifier with dynamic gain fluctuation control in the present invention. As can be seen from the figure, the present invention has a Raman fiber amplifier with dynamic gain fluctuation control, which sequentially includes an optical splitter 1, a signal / pump wavelength division multiplexer 2, a Raman gain fiber 3, and a signal / pump output from signal input to signal output. The wave division multiplexer 4 and the optical splitter 5 are characterized in that:

[0045] ①. 2n pump lasers are used to form a pump laser array 9, and a pump multiplexer 10 is used to couple the power of each pump source together in a reverse excitation mode, and the signal / pump wave demultiplexer 4 coupling the combined pump light into the Raman gain fiber 3;

[0046] ②. An input signal power measuring device is composed of an optical splitter 1, a signal demultiplexer 6 and a pin tube receiver array 7, ...

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Abstract

An amplifier includes two parts as Raman amplifying part consists of a set of pumping laser array, pumping wave combining device, a section of Raman gain optical fibre, signal/pumping multiplexer and demultiplexer and signal demultiplexer; gain feedback control device consists of signal input-output power measurement and pumping laser controller. As discrete Raman optical fibre amplifier, it can realize C+L waveband 1428-1604 nm dispersion compensation by applying dispersion compensating fibre as Raman gain media and realize gain spectrum smooth and fluctuation control for optical signal waveband by controlling output power of N number of pumping lasers in 14xxnm.

Description

Technical field: [0001] The invention relates to a fiber amplifier, in particular to a Raman fiber amplifier with dynamic gain fluctuation control. technical background: [0002] Optical fiber amplifiers have been widely used in optical fiber communication systems. For the fourth-generation optical wave system, the focus is to increase transmission capacity by simultaneously transmitting multiple channels using wavelength division multiplexing (WDM) technology. For a multi-channel light wave system, an optical amplifier is required, which can amplify all channels simultaneously without demodulating each channel like an electro-optic repeater and then amplifying them separately. With the continuous increase of the working bandwidth of the optical communication system, the bandwidth of the optical fiber amplifier is also continuously increased. [0003] The basic mechanism of the Raman fiber amplifier is that the pump photons are absorbed by the fiber to make the fiber molec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/39H04J14/02
Inventor 蒋凤仙李苏明沈骏
Owner FUDAN UNIV
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