High-efficiency single-frequency thulium-doped fiber laser based on in-band pumping

A fiber laser, high-efficiency technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of difficulty in improving laser efficiency, low absorption cross-section, and difficulty in achieving it, so as to achieve convenient and high-efficiency Absorption coefficient, effect of reducing thermal deposition
CN113675720APending Publication Date: 2021-11-19TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2021-11-19

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Abstract

The invention discloses a high-efficiency single-frequency thulium-doped fiber laser based on in-band pumping. Laser with the wavelength of 1650 nm is adopted as a pumping thulium-doped fiber laser, the pumping wavelength corresponds to the vicinity of the peak value of a pumping absorption spectrum in a thulium-doped fiber ribbon, the high absorption cross section is achieved, the small quantum loss is achieved, the efficiency of the laser can be greatly improved, and the noise and line width characteristics of the laser are improved. High-efficiency and high-power 1650 nm laser output can be obtained in a stimulated Raman scattering mode, and a foundation is laid for obtaining a high-power single-frequency fiber laser.
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Description

technical field

[0001] The invention relates to the field of fiber lasers, in particular to a high-efficiency single-frequency thulium-doped fiber laser based on in-band pumping, and in particular to a new pumping method for the thulium-doped fiber laser. Background technique

[0002] Thulium-doped fiber laser is an effective technical means to obtain 2μm fiber laser. In recent years, the research on thulium-doped fiber laser has been deepening. At present, the mainstream fiber resonator structure is DBR (distributed Bragg reflection, distributeBragg reflection) short-cavity structure. Due to its short active fiber length (<2cm), it is difficult to obtain high-efficiency laser output. In the past 10 years, the mainstream method is to use highly doped rare earth doped soft glass fiber as the gain medium in the resonator to improve the output efficiency of the laser. Thulium-doped fiber lasers based on germanate and silicate glass substrates have been reported one after an...

Claims

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