A darkening bleaching device and method based on fiber laser darkening maintenance

A technology of fiber lasers and lasers, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems that darkening cannot be adjusted and improved, and achieve slow darkening process, high stability and adaptability, and operation easy effect

Active Publication Date: 2018-03-09
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • A darkening bleaching device and method based on fiber laser darkening maintenance
  • A darkening bleaching device and method based on fiber laser darkening maintenance
  • A darkening bleaching device and method based on fiber laser darkening maintenance

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example 1

[0032] The instructions for using the darkening and bleaching device of the present invention to carry out laser photon darkening and bleaching are as follows;

[0033] When the 30w ytterbium-doped laser works for 300 hours, when the pump light (915nm or 975nm pump source) is turned off, turn on the driving power of the darkened bleaching light source, adjust the input power, and use the center wavelength at 793nm to darken the bleaching light source The output power is 5 watts and it can work continuously for 12 hours. Turn off the driving power of the darkened bleaching light source, and use it again in accordance with the requirements for the use of ytterbium-doped fiber lasers. After working for 300 hours, the power of the 30w ytterbium-doped fiber laser dropped to 29w. After darkening and bleaching using the darkening and bleaching device of the present invention, the power is restored to 29.7 watts, and the recovery degree of darkening and bleaching reaches 70%. When t...

example 2

[0035] The instructions for using the darkening and bleaching device of the present invention to carry out laser photon darkening and bleaching are as follows;

[0036] When the 100w ytterbium-doped laser is pumped for 150 hours, when the pump light (15nm or 975nm pump source) is turned off, turn on the driving power of the darkened bleaching light source, adjust the input power, and use the center wavelength at 808nm to darken the bleaching light source The output power is 12 watts and it can work continuously for 12 hours. Turn off the driving power of the darkened bleaching light source, and use it again in accordance with the requirements for the use of ytterbium-doped fiber lasers. The recovery rate of the power loss caused by the darkening of the ytterbium-doped fiber laser before and after darkening and bleaching by adding the darkening and bleaching device of the present invention is 68%. After the fiber laser works for 300 hours, the above steps are repeated to final...

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PUM

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Abstract

The invention discloses a photon darkening bleaching device to solve the current situation of lack of intervention in the photon darkening phenomenon in the operation process of the ytterbium-doped fiber laser. The invention includes a darkening bleaching light source and a driving power source thereof. The present invention adds a darkening and bleaching device inside the ytterbium-doped fiber laser, so the main structure of the fiber laser is not changed and has high applicability. The device of the invention is especially suitable for periodically bleaching the darkening of the fiber laser during work, which promotes the stability of the power of the fiber laser during use, slows down the photon darkening process of the laser, and improves 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/113H01S3/067
Inventor 李海清李进延赵楠戴能利彭景刚杨旅云廖雷
Owner HUAZHONG UNIV OF SCI & TECH
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