Optical fiber amplifier
A fiber amplifier and fiber technology, which is applied in lasers, fiber transmission, laser parts, etc., can solve the problem of low pulse quality, and achieve the effect of solving low pulse quality, high compression ratio and improving quality.
Active Publication Date: 2020-06-05
GUANGDONG UNIV OF TECH
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[0004] The application provides an optical fiber amplifier, which is used to solve the technical problem that the pulse quality output by the existing optical fiber amplifier is not high
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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 invention discloses an optical fiber amplifier. The optical fiber amplifier is formed by communication connection of a tunable laser, a first optical isolator, a pumping device, a wavelength division multiplexer, a signal amplification device, a three-port circulator and a dispersion decreasing optical fiber loop mirror. The hyperbolic secant dispersion decreasing optical fiber is used for transmitting a pulse signal; the balance between group velocity dispersion and self-phase modulation is maintained by adjusting a second-order dispersion coefficient, so that a good waveform of the pulseis kept in a transmission process, thereby improving quality of output pulses; the chromatic dispersion decreasing optical fiber loop mirror is composed of a first chromatic dispersion decreasing optical fiber and a second chromatic dispersion decreasing optical fiber, wherein the length of the first dispersion decreasing optical fiber and the length of the second dispersion decreasing optical fiber are in a preset proportion, and the length of the second dispersion decreasing optical fiber is greater than the length of the first dispersion decreasing optical fiber. According to the invention, the compression ratio is high, and the compressed pulse is not generated by a base; the quality of the output pulse can be improved, and the technical problem that the quality of the pulse output byan existing optical fiber amplifier is not high is solved.
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