A Multi-Wavelength Brillouin Fiber Laser with 44GHz Frequency Spacing

Abstract

The invention discloses a multi-wavelength Brillouin fiber laser with a frequency interval of 44 GHz, including a narrow-linewidth semiconductor laser, a four-port fiber coupler, a first four-port optical circulator, a first single-mode fiber, and a second single-mode fiber , the second four-port optical circulator and the erbium-doped fiber amplifier, wherein the first four-port optical circulator, the first single-mode fiber, the second single-mode fiber and the second four-port optical circulator together form a fourth-order Brillouin Frequency shifter, the narrow-linewidth laser used as Brillouin pump passes through the fourth-order Brillouin frequency shifter to generate Brillouin Stokes light whose frequency is shifted down to 44GHz, the Brillouin Stokes light After being amplified by the erbium-doped fiber amplifier, part of the light is output through the fiber coupler, and the other part of the light enters the fourth-order Brillouin frequency shifter for cyclic downshifting of the 44GHz frequency, so that the ring cavity structure can generate wavelength channels with a frequency interval of 44GHz. Multi-wavelength Brillouin laser.

Description

technical field [0001] The invention relates to a fiber laser, in particular to a multi-wavelength Brillouin fiber laser with a frequency interval of 44 GHz. Background technique [0002] Multi-wavelength fiber lasers can effectively reduce system costs and optimize the design of optical transceivers in optical communication systems, and have important application prospects in large-capacity dense wavelength division multiplexing systems. In addition, in the field of microwave signal generation by photon technology, multi-wavelength fiber lasers with stable room temperature and narrow linewidth can obtain high-quality tunable ultra-high frequency microwave signals. Multi-wavelength fiber lasers can also be used as microwave photon filters in microwave photon filter systems. The taps of the laser can replace the laser array to obtain a large number of taps, which greatly reduces the system cost. Multi-wavelength fiber lasers can be used in fiber optic sensing systems to achi...

AI Technical Summary

Problems solved by technology

[0003] The wavelength interval of multi-wavelength Brillouin fiber laser generally depends on the material properties of the stimulated Brillouin dispersion optical medium. The wavelength interval of multi-wavelength Brillouin fiber laser is generally about 11GHz, and the multi-wavelength Brillouin fiber with 22GHz wavelength interval There are also researches on lasers, but these are too narrow in dense wavelength division multiplexing optical communication systems, which brings difficulties to the demodulation of optical signals, increases system complexity and cost, and easily leads to crosstalk between channels and bit errors , reducing system performance

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