Multi-wavelength Brillouin fiber laser with triple Brillouin frequency shift interval

Abstract

The invention discloses a multi-wavelength Brillouin fiber laser with a triple Brillouin frequency shift interval. The Brillouin fiber laser comprises a tunable laser (1), a first optical fiber coupler (2), a first optical circulator (3), a first optical amplifier (4), a first Brillouin optical fiber (5), a second optical fiber coupler (6), a second optical amplifier (7), a second Brillouin optical fiber (8) and a second optical circulator (9). The tunable laser is used as a Brillouin pump, cascade stimulated Brillouin scattering is circularly generated in the first Brillouin optical fiber andthe second Brillouin optical fiber by utilizing power gains of the two optical amplifiers, and a multi-wavelength Brillouin optical fiber laser with triple Brillouin frequency shift intervals can begenerated. The multi-wavelength Brillouin fiber laser method is simple in structure and low in cost, and has application potential in optical communication, microwave photons and optical fiber sensing.

Description

technical field [0001] The invention belongs to the field of fiber laser, and relates to a multi-wavelength Brillouin fiber laser with triple Brillouin frequency shift interval. Background technique [0002] Stimulated Brillouin scattering (SBS) is a nonlinear optical effect produced by the interaction of light waves and sound waves through electrostriction, and at room temperature, SBS can be easily cascaded in optical fibers to achieve multi-wavelength distribution. Liouin signal output. Due to the advantages of multi-wavelength Brillouin fiber laser with fixed wavelength interval, low threshold, narrow linewidth, high optical power conversion effect, and compact structure, it has been widely studied by domestic researchers since its birth. Cowle and Stapanov first proposed the method of combining the linear gain in erbium-doped fiber with the nonlinear Brillouin gain in single-mode fiber in 1996, and obtained six wavelength outputs at intervals of 10 GHz, representing mu...

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Problems solved by technology

Although there are many reports on multi-wavelength lasers with multiple Brillouin frequency shift intervals, they still cannot meet the needs of the communication industry due to the shortcomings of complex structure, high system cost, and wide tunable range. Therefore, low threshold power, low A multi-wavelength Brillouin laser with a system cost and a simple structure greater than twice the Brillouin frequency shift interval is necessary

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