Random fiber laser based on random Brillouin dynamic grating

Abstract

The invention aims to solve the following problems in the prior art: an existing random fiber laser based on Rayleigh scattering is weak in Rayleigh scattering and high in hot-shot threshold and requires for long-distance optical fibers; a random fiber laser based on the Raman effect requires for a high-power pumping light source; and a random fiber laser based on a random distribution grating array is complex in manufacturing process. In order to solve the above problems in the prior art, the invention provides a brand-new random fiber laser based on a random Brillouin dynamic grating. The brand-new random fiber laser based on the random Brillouin dynamic grating comprises a laser source, a 1*2 optical fiber coupler, a first electro-optical modulator, a first random optical pulse generator, a first optical isolator, a delay fiber, a first erbium-doped optical fiber amplifier, a first polarization controller, a polarization beam combiner, a second optical isolator, a second electro-optical modulator, a second random optical pulse generator, a third optical isolator, a second erbium-doped fiber amplifier, a single sideband modulator, a microwave source, a second polarization controller, a fourth optical isolator, a polarization maintaining fiber, a pumping laser source, a wavelength division multiplexer, a reflector and an erbium-doped fiber.

Description

technical field [0001] The invention relates to the technical field of random fiber lasers, in particular to a random fiber laser based on random Brillouin dynamic gratings. Background technique [0002] Random fiber laser is a new type of laser developed in recent years. Compared with traditional lasers, random fiber laser light feedback is realized through random feedback in the fiber. In 2009, Lizárraga N and others realized the random fiber laser based on Bragg grating array for the first time. They wrote randomly distributed fiber grating array in the erbium-germanium co-doped fiber with a length of 150cm to form a random fiber laser (Optics Express, 2009 , 17(2):395-404.). In 2013, I. D. Vatnik et al proposed a highly efficient random fiber laser based on Rayleigh scattering (Optoelectronics Instrumentation & Data Processing, 2013, 49(4):323-344.). In 2014, Raman Kashyap's research group proposed a random Raman fiber laser based on a long-phase-shifted random fiber g...

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Problems solved by technology

[0004] In order to solve the weak Rayleigh scattering existing in the existing random fiber laser based on Rayleigh scattering, the present invention needs long-distance optical fiber and high lasing threshold, and the random fiber laser based on Raman effect needs a relatively high-power pump light source. And the random fiber laser based on randomly distributed grating array has the problem of complicated manufacturing process, and a new random fiber laser based on random Brillouin dynamic grating is provided

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