Device and method for generating multi-wavelength laser larger than two times of Brillouin frequency shift interval

Abstract

The invention discloses a device for generating multi-wavelength laser larger than two times of a Brillouin frequency shift interval. The device comprises an adjustable laser source, a first optical fiber coupler, a first optical amplifier, a first optical circulator, a Brillouin gain fiber, an N-2-order Brillouin frequency shifter, a second optical circulator, an adjustable band pass filter and a second optical fiber coupler, wherein N is a natural number larger than 2. Multi-wavelength Brillouin-Stock signal light of N times of the interval is acquired through cyclic cascade frequency shift of Brillouin pump light in the Brillouin gain fiber and the N-2-order Brillouin frequency shifter. The invention further discloses a method for generating multi-wavelength laser larger than two times of the Brillouin frequency shift interval. A multi-wavelength Brillouin laser device with wavelength interval larger than two times of the Brillouin frequency shift interval is realized through a full-optical-fiber structure for the first time, and the multi-wavelength Brillouin laser device is especially suitable for the technical field of optical communication, optical sensing and microwave photonics.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to a multi-wavelength laser generating device and method with an interval greater than twice the Brillouin frequency shift. Background technique [0002] The multi-wavelength Brillouin erbium-doped fiber laser combines the nonlinear effect of stimulated Brillouin scattering in the fiber and the linear amplification in the erbium-doped fiber to generate stable multi-wavelength Brillouin laser output at room temperature. In optical communication systems, multi-wavelength fiber lasers can effectively reduce system costs and optimize the design of optical transceivers, 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...

AI Technical Summary

Problems solved by technology

[0003] The wavelength interval of a multi-wavelength Brillouin fiber laser depends on the material properties of the stimulated Brillouin dispersion optical medium. The wavelength interval of a traditional multi-wavelength Brillouin fiber laser is about 11 GHz. It brings difficulties to the demodulation of optical signals, increases the complexity and cost of the system, and also easily leads to crosstalk between channels, resulting in bit errors and reducing system performance.

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