Full optical fiber laser synthesizer and preparation method thereof

A laser synthesis and all-fiber technology, which is applied to laser components, lasers, phonon exciters, etc., can solve the problems of coupling device damage, reduce welding or tapering, realize mass production, and facilitate mass production Effect

Inactive Publication Date: 2010-08-04
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it avoids the problem that the end-coupled pump laser is concentrated on the fiber end face and is easily damaged by the coupling device.

Method used

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  • Full optical fiber laser synthesizer and preparation method thereof
  • Full optical fiber laser synthesizer and preparation method thereof
  • Full optical fiber laser synthesizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] attached figure 1 Shown is the first embodiment of the all-fiber laser synthesis device of the present invention, which is a schematic diagram of the appearance. All the fibers in the fiber bundle have the same length, generally between 1 and 30 m, and the length of the fiber bundle is different according to the application of the fiber laser. The fiber bundle consists of 6 step-type multimode fibers and a rare earth-doped fiber. The rare-earth-doped optical fiber is located in the middle of the fiber bundle. In this embodiment, the rare-earth-doped optical fiber is an erbium-ytterbium co-doped optical fiber. Its inner cladding structure is a regular hexagon, and 6 multimode optical fibers are uniformly distributed around it. Their claddings are doped Fluoroquartz composition, the core layer is pure silicon composition, attached figure 2 A cross-sectional structure diagram of the fiber bundle is given. The core diameter / cladding diameter of the multimode optical fibe...

Embodiment 2

[0049] Outline schematic diagram of the second embodiment of the present invention and attached figure 1 Basically the same, the length of all the optical fibers in the fiber bundle is the same, the general length is between 1 and 30m, and the length of the fiber bundle is different according to the use of the fiber laser. The optical fiber bundle is composed of 10 step-type multimode fibers and a rare earth-doped fiber, the middle one is an ytterbium-doped fiber, and its inner cladding structure is a regular decagon, and 10 multimode fibers are evenly distributed around it. The layer is composed of fluorine-doped quartz, and the core layer is composed of pure silicon. image 3 A cross-sectional structure diagram of the fiber bundle is given. The core diameter / cladding diameter of the multimode optical fiber are both 105 / 125 μm or 200 / 220 μm or 400 / 440 μm, or other possible specifications, and the numerical aperture is 0.10-0.25. The core diameter of the rare earth-doped opt...

Embodiment 3

[0053] Outline schematic diagram of the third embodiment of the present invention and attached figure 1 Basically the same, the length of all the optical fibers in the fiber bundle is the same, the general length is between 1 and 30m, and the length of the fiber bundle is different according to the use of the fiber laser. The fiber bundle consists of 12 step-type multimode fibers and a rare earth-doped fiber. The middle one is an ytterbium-doped fiber. Its inner cladding structure is a regular hexagon, and 12 multimode fibers are evenly distributed around it. Their cladding It is composed of fluorine-doped quartz, and the core layer is composed of pure silicon. Two multimode fibers are arranged on each side of the inner cladding of the rare earth-doped optical fiber, with Figure 4 A cross-sectional structure diagram of the fiber bundle is given. The core diameter / cladding diameter of the multimode optical fiber are both 105 / 125 μm or 200 / 220 μm or 400 / 440 μm, or other possib...

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Abstract

The invention discloses a novel all optical fiber laser synthesizer which is used for high-power optical fiber lasers and amplifiers and a preparation method thereof. The novel full optical fiber laser synthesizer is composed of an optical fiber bundle consisting of a plurality of optical fibers with a certain diameter, wherein the optical fiber bundle comprises a rare earth doped fiber 11 in the middle and a plurality of multimode optical fibres 12, the shape of the rare earth doped fiber 11 the coating of which is removed is regular polygon, and the shape of the multimode optical fibre the coating of which is removed is round; all optical fibers in a middle position 02 are tight and close, and the outer surface of the optical fiber bundle is coated with a coating with the refractive index lower than that of pure quartz; and all optical fibers on two end parts 01 and 03 of the optical fiber bundle can be separated, and each optical fiber is independently coated with a coating. The fiber bundle is formed by carrying out wiredrawing on the corresponding optical fiber preform bunch on an optical fiber wire drawer tower in the mode of designed arrangement. The full optical fiber laser synthesizer of the invention has simple preparation process, is suitable to be produced in large batch and has the characteristics of high reliability and low insertion loss.

Description

technical field [0001] The invention relates to an all-fiber laser synthesis device, in particular to the structure of the all-fiber laser synthesis device and its preparation method. It belongs to an optical passive device and is used in high-power fiber lasers and amplifiers. Background technique [0002] High-power fiber lasers and amplifiers are one of the hotspots in the laser field in recent years. They are simple in structure, small in size, flexible and convenient to use, easy to achieve high efficiency and high power, and have good quality output laser beams. These are the deficiencies of traditional solid-state lasers and gas lasers. Therefore, in the fields of material processing and other fields, fiber lasers have a tendency to replace traditional lasers, and are considered to be the most powerful competitors of the third-generation lasers, especially those applied to optical fiber communication windows. The development of fiber lasers with a wavelength of 1.55 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/094
Inventor 蒋作文李进延戴能利彭景刚李海清杨旅云
Owner HUAZHONG UNIV OF SCI & TECH
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