Broadband high-order Raman fiber random laser

Abstract

The invention discloses a broadband high-order Raman fiber random laser which comprises a tunable ytterbium-doped fiber laser seed source, a diode pumping source, a pumping beam combiner, an ytterbium-doped fiber, a second fiber isolator, a first wavelength division multiplexer, a Raman fiber, a second wavelength division multiplexer, a fiber circulator and a super-radiation light emitting diode which are connected in sequence. The tunable ytterbium-doped fiber laser seed source is amplified by the ytterbium-doped fiber to serve as a cascade Raman random laser pumping source, and the broadband fiber ring reflector and a first fiber inclined end face for laser output are connected with a first wavelength division multiplexer; the end face reflectivity of the inclined end face of the first optical fiber is adjustable; the super-radiation light-emitting diode is connected with the second wavelength division multiplexer through the optical fiber circulator; the tunable ytterbium-doped fiber laser is subjected to power amplification through the ytterbium-doped fiber amplifier and then excites cascade Raman random laser in the Raman fiber, backward injection is carried out through the broadband seed, the reflectivity-adjustable fiber inclined end face is adopted at the output end, and low-noise bandwidth-controllable broadband high-order Raman random laser is achieved. The problems that in the prior art, high-order Raman random laser noise is large, and the bandwidth is difficult to regulate and control are solved.

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