High power superfluorescence light source with all-fiber structure and 980nm waveband

Abstract

The invention discloses a high power superfluorescence light source with an all-fiber structure and a 980nm waveband. The invention aims to provide the high power superfluorescence light source with the all-fiber structure and the 980nm waveband on the basis of double-clad fiber and semiconductor laser direct pumping. The high power superfluorescence light source is composed of a gain module, two pumping modules and two output coupling ends, wherein the gain module is composed of a pumping coupling module and a double-clad ytterbium-doped fiber, and two lateral pumping beam combers or K multi-mode fibers are adopted by the pumping coupling module; each of the two pumping modules comprises a plurality of pumping sub-modules, and each of the pumping sub-modules has a semiconductor laser or beam combing structure capable of outputting 900nm-960nm wavebands from the tail fiber; and the input ends of the two output coupling ends are respectively connected with a signal optical output end of the gain module. The high power superfluorescence light source disclosed by the invention is used for solving the problem of limitation of pumping to the output power, the restraining problem of a 1030nm waveband self-amplifying radiation light field and the problem of pumping optical coupling.

Description

technical field [0001] The invention relates to a superfluorescent light source, in particular to a high-power superfluorescent light source with an all-fiber structure with a working waveband near 980nm (970nm-985nm). Background technique [0002] Superfluorescent fiber optic light source has low time coherence, good wavelength stability and wide-spectrum output characteristics, and has been widely used in the fields of fiber optic sensing systems, fiber optic communications, optical The output power of fluorescent fiber optic light sources has been continuously improved, and this broadband light source has also been used in pumped Raman lasers and supercontinuum light sources. The unique advantages of the superfluorescent fiber optic light source make it have a good application prospect in the fields of industrial processing and national defense. [0003] The 980nm band hyperfluorescent fiber light source is a new type of superfluorescent light source, which has attracted...

AI Technical Summary

Problems solved by technology

By using double-clad fiber to increase the coupling power of the pump light, it solves the limitation of the output power of the core pump; by using a double-clad fiber with a large core-cladding ratio, it solves the problem of suppressing the spontaneously emitted large radiation light field in the 1030nm band; Solve the problem of pump light coupling by adopting side pumping method

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