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
CN112142319BActive 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
6 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
武汉光谷航天三江激光产业技术研究院有限公司
Publication Date
2021-03-16

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More