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A kind of axial absorption graded optical fiber and its preparation method, fiber laser

A graded fiber, axial technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of uneven thermal load of fiber, mode instability, etc., to improve the mode instability threshold, easy to realize, improve The effect of heat dissipation

Active Publication Date: 2021-03-16
武汉光谷航天三江激光产业技术研究院有限公司
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Problems solved by technology

It solves the problem of uneven thermal load and mode instability in high-power fiber lasers, and realizes higher power laser output; and the invention has the advantages of simple structure, easy implementation, stability and reliability, etc.

Method used

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  • A kind of axial absorption graded optical fiber and its preparation method, fiber laser
  • A kind of axial absorption graded optical fiber and its preparation method, fiber laser
  • A kind of axial absorption graded optical fiber and its preparation method, fiber laser

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0024] In one embodiment of the present invention, as figure 1 As shown, a method for preparing an axial absorption graded optical fiber includes the following steps.

[0025] S1, deposit and sinter radially from the outside to the inside of the quartz substrate tube to form more than two sintered layers that are successively set in order to obtain a radial doped gradient quartz glass rod; wher...

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Abstract

The invention discloses an axially absorbing graded optical fiber, a preparation method thereof, and a fiber laser. The preparation method comprises the steps of: depositing and sintering in a quartz substrate tube radially from the outside to the inside to form two or more sintered layers sequentially sleeved; In order to obtain a quartz glass rod with a radial doping gradient; the quartz glass rod is cut into a block-shaped rough blank along the radial direction of the quartz glass rod, and the block-shaped rough blank is ground into a cylindrical glass rod; wherein , the axial direction of the cylindrical glass rod is parallel to the radial direction of the quartz glass rod; the cylindrical glass rod is drawn along the axial direction of the cylindrical glass rod to form an optical fiber with an axial absorption gradient. The invention solves the problem of uneven thermal load and mode instability in the high-power fiber laser, and realizes higher power laser output; and the invention has the advantages of simple structure, easy realization, stability and reliability, and the like.

Description

technical field [0001] The technical field of optical fiber laser preparation of the present invention, more specifically, relates to an axial absorption graded optical fiber, a preparation method thereof, and an optical fiber laser. Background technique [0002] In the field of fiber laser, the absorption of the currently used gain fiber is uniformly distributed and stable in the axial direction, and the corresponding parameters such as fiber numerical aperture and doping concentration are uniform. This kind of fiber has a simple structure and is easy to produce. It is used in fiber lasers. fields are widely used. [0003] In the field of fiber lasers, whether the pumping method is forward pumping, reverse pumping or bidirectional pumping, it is difficult to average the degree of population inversion in the gain fiber with uniform axial absorption. Since the gain fiber near the pump end is highly pumped, its population inversion degree is high, and the gain fiber in the mi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/027C03B37/012H01S3/067
CPCC03B37/01205C03B37/027H01S3/0672H01S3/06729
Inventor 杨雨雷敏廖明龙戴玉芬胡阿健武春风李强姜永亮刘厚康宋祥
Owner 武汉光谷航天三江激光产业技术研究院有限公司
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