A Fiber Amplifier
A fiber amplifier and fiber technology, applied in lasers, fiber transmission, laser parts, etc., can solve the problem of low pulse quality, and achieve the effect of improving quality and good waveform
Active Publication Date: 2022-04-19
GUANGDONG UNIV OF TECH
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[0039] The embodiment of the present application provides a first embodiment of an optical fiber amplifier. The optical fiber amplifier in this embodiment includes a hyperbolic secant type dispersion decreasing optical fiber 2, a dispersion decreasing optical fiber loop mirror 10, a tunable laser 1, a first An optical isolator 3, a pumping device 4, a wavelength division multiplexer 9, a signal amplification device and a three-port circulator 8; a hyperbolic secant type dispersion-decreasing optical fiber 2 is used for signal transmission, and a dispersion-decreasing optical fiber loop mirror 10 includes The first dispersion reduction optical fiber and the second dispersion reduction optical fiber, the length of the first dispersion reduction optical fiber is preset in proportion to the length of the second dispersion reduction optical fiber, and the length of the second dispersion reduction optical fiber is longer than the first dispersion reduction optical fiber Reduce the le...
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The application discloses an optical fiber amplifier, which is composed of a tunable laser, a first optical isolator, a pumping device, a wavelength division multiplexer, a signal amplifying device, a three-port circulator, and a optical fiber ring mirror with decreasing dispersion. Composition, and use hyperbolic secant type dispersion decreasing optical fiber to transmit pulse signal, maintain the balance between group velocity dispersion and self-phase modulation by adjusting the second-order dispersion coefficient, so that the pulse can maintain a good waveform during transmission and improve the output The quality of the pulse, the dispersion reduction optical fiber loop mirror is composed of a first dispersion reduction optical fiber and a second dispersion reduction optical fiber, the length of the first dispersion reduction optical fiber is preset in proportion to the length of the second dispersion reduction optical fiber, and the second The length of the second dispersion decreasing fiber is longer than that of the first dispersion decreasing fiber, which has the advantages of high compression ratio and no pedestal for the compressed pulse, which can improve the quality of the output pulse and solve the problem of the pulse quality output by the existing optical fiber amplifier. Not a high technical issue.
Description
technical field [0001] The present application relates to the technical field of amplifiers, in particular to an optical fiber amplifier. Background technique [0002] With the development of society, signal transmission becomes more and more important. An optical fiber amplifier that realizes signal amplification has high gain, low noise, high power, wide operating frequency band, small polarization, and transparency to transmission code rate and format, etc. Advantages, and are widely used in optical communications, optical networks and cable television and other fields. [0003] Existing optical fiber amplifiers use single-mode optical fiber to transmit pulses and use traditional optical fiber loop mirrors to compress the pulses. When the pulse is transmitted in the single-mode fiber, the pulse will be distorted due to the imbalance of group velocity dispersion and self-phase modulation, which will make the quality of the output pulse lower. The pulse compression of the ...
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IPC IPC(8): H04B10/291H04B10/25G02F1/39H01S3/067
CPCH04B10/291G02F1/39H01S3/06754
Inventor 史圣达张巧芬
Owner GUANGDONG UNIV OF TECH