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Methods for making active laser fibers

A technology of optical fibers and fibers, which is applied in lasers, manufacturing tools, glass manufacturing equipment, etc., and can solve problems such as joint costs

Active Publication Date: 2013-09-18
J FIBER GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, not only ultrasonic drilling but also the bonding of cladding parts is relatively labor-intensive and requires a high degree of experience in production technology

Method used

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  • Methods for making active laser fibers
  • Methods for making active laser fibers
  • Methods for making active laser fibers

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Experimental program
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Embodiment Construction

[0030] Figure 1a An initial configuration consisting of a central rod 1 and auxiliary rods 2 is shown. They are surrounded by a peripheral tube 3 . In the present case, the central rod and the auxiliary rod each have a circular cross section. The auxiliary rods are arranged evenly around the central rod. The peripheral tube can be installed before the actual stretching process or can only be attached directly during the stretching process. The exemplary shape shown in FIG. 1 has a six-fold symmetry, but this symmetry deviates significantly from cylindrical symmetry.

[0031] During the subsequent drawing process, the disturbed cylindrical symmetry is transferred to the resulting fibers. Figure 1b The fiber cross section produced here is shown. The fiber has an outer profile 4 which deviates considerably from a circular profile. Figure 1a The peripheral tube 3 in the fiber drawing process has been transformed into a filler material or a glass matrix (Glasmatrix) 5 whic...

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Abstract

Methods for making active laser fibers include the production of an optical fiber with disturbed (or deviated) cylindrical symmetry on the glass surface of the fiber. The methods include a preform containing a central core made of glass. In one embodiment, the preform is circular and surrounded by additional glass rods and an outer glass jacket tube. In a first alternative embodiment, this preform is merged during fiber drawing. In a second alternative embodiment, the preform merged in a process forming a compact glass body with disturbed cylindrical symmetry. This compact preform is drawn into a fiber under conditions maintaining the disturbed cylindrical symmetry.

Description

technical field [0001] Active laser fibers are used to generate laser light. Devices of this type are also known as "fiber lasers". In laser fibers, the light-guiding core is doped and forms the laser-active medium. External pump excitation is applied across the fiber cross-section and affects the active core. Due to the multiple reflections of the light guided inside the core and the large length of the fiber, a high gain of the laser radiation is achieved here, which is decoupled at the fiber end. Background technique [0002] In order to achieve a high optical efficiency when converting the pump energy into laser power, active fibers with rare earth elements are used. These fibers are jacketed with a pump core which is characterized by a disturbed cylindrical symmetry or mechanical stresses which are induced by differences in the refractive index in the pump core. According to the prior art, such pump cores are produced from cylindrical preforms, the cylindrical symme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/025
CPCC03B37/01217C03B37/0122C03B37/01222C03B2201/04C03B2201/10C03B2201/12C03B2201/28C03B2201/31C03B2203/02C03B2203/12C03B2203/14C03B2203/31C03B2203/34C03B2205/40H01S3/094007C03B37/01211C03B37/02763
Inventor J·罗森克兰茨K·勒斯纳W·黑默勒L·布雷姆R·汉夫
Owner J FIBER GMBH