Darkening bleaching device and method based on fiber laser darkening maintenance

Abstract

The invention discloses a photodarkening bleaching device, so as to solve the problem that at present a photodarkening phenomenon lacks intervention in a ytterbium-doped fiber laser running process. The photodarkening bleaching device includes a darkening bleaching light source and a driving power supply thereof. A darkening bleaching device is added to the inside of a ytterbium-doped fiber laser, a main body structure of the fiber laser is not changed, and high applicability is achieved. The device provided by the invention is particularly suitable for performing bleaching on fiber laser darkening periodically in working, promotes stability of power in a using process of the fiber laser, slows down a photodarkening process of the laser, and prolongs the service life of the laser.

Description

technical field [0001] The invention belongs to the field of fiber lasers, and more specifically relates to a photon darkening and bleaching device and method for an ytterbium-doped fiber laser. Background technique [0002] Ytterbium ions have the advantages of simple energy level structure, long fluorescence lifetime in the excited state, and small quantum defects, while the optical fiber with quartz as the matrix has a very high laser damage threshold, so ytterbium-doped silica optical fiber is widely used to prepare various high-power Fiber laser and amplifier systems. The working wavelength of this system is 1.0um to 1.1um, which has great practicability and broad application prospects, and is widely used in material processing, laser weapons, bio-optics and medicine. With the continuous development of technologies such as semiconductor pump sources, pump coupling, and fiber design and preparation, the output power of ytterbium-doped silica fiber lasers and amplifier s...

AI Technical Summary

Problems solved by technology

[0006] Whether it is the study of the photon darkening mechanism, the use of co-doped ions to prepare low photon darkening fibers, or the fast and stable photon darkening test method, it can only be achieved to ensure that the ytterbium-doped fiber used in fiber lasers is as low as possible. Darkening characteristics, but once the fiber is determined, the darkening caused by the use of the laser cannot be controlled; and fiber lasers have not yet been bleached using the central wavelength bands of 793nm and 808nm darkening bleaching light sources

To sum up, the research and achievements so far cannot improve the intervention and optimization of the photon darkening phenomenon in the ytterbium-doped fiber laser during use after the fiber laser is assembled into a complete machine.

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