Thulium-doped gain fiber and fiber laser

A technology of gain fiber and fiber, which is applied in the direction of lasers, laser components, cladding fibers, etc., can solve the problems of laser output power improvement, energy absorption unevenness, etc., achieve output beam quality and output power improvement, and prevent thermal lens effect , the effect of reducing light damage

Active Publication Date: 2019-01-29
JOINTO TECH CO LTD
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  • Claims
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Problems solved by technology

However, this doping structure will lead to uneven energy absorption in the incident direction of the pump light inside the crystal, forming temperature gradient effects, end face deformation thermal lens effects, birefringence effects, etc. inside the crystal. These thermal effects limit the absorption of incident light by the laser working crystal. Increased efficiency while limiting the increase in laser output power

Method used

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  • Thulium-doped gain fiber and fiber laser
  • Thulium-doped gain fiber and fiber laser

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Effect test

Embodiment 1

[0046] like figure 1 As shown, the present invention provides a thulium-doped gain fiber, which includes an outer cladding, an inner cladding and a doped core 1, and the doped core 1 is provided with low-doped segments 2 at intervals along the longitudinal direction.

[0047] The length of the low-doped section 2 is 0.01 cm. All low doped segments 2 have the same length.

[0048] The distance between the low-doped segments 2 is 0.5 cm.

[0049] The optical fiber is made of germanate glass. The germanate glass optical fiber has good thermal stability and infrared transparency, high solubility of rare earth ions, and low phonon energy. It is the rare earth doped 2μm laser output. Good base material. Moreover, the germanate glass can realize the effect of high doping of rare earth ions, and the gain effect is good, and the single longitudinal mode output can be realized by shortening the cavity length.

[0050]The molar percentage range of the glass matrix of part 3 other tha...

Embodiment 2

[0073] like figure 2 As shown, the present invention provides a thulium-doped gain fiber, which includes an outer cladding, an inner cladding and a doped core 1, and the doped core 1 is provided with low-doped segments 2 at intervals along the longitudinal direction. A cylindrical low-doped portion 4 is arranged in the center of the fiber core.

[0074] The length of the low-doped section 2 is 0.2 cm. All low doped segments 2 have the same length.

[0075] The distance between the low-doped segments 2 is 10 cm.

[0076] The optical fiber is made of germanate glass. The germanate glass optical fiber has good thermal stability and infrared transparency, high solubility of rare earth ions, and low phonon energy. It is the rare earth doped 2μm laser output. Good base material. Moreover, the germanate glass can realize the effect of high doping of rare earth ions, and the gain effect is good, and the single longitudinal mode output can be realized by shortening the cavity leng...

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Abstract

The invention provides a rare earth doped gain fiber and a fiber laser oscillator. According to the thulium-doped gain fiber and the fiber laser, a low-doping thermally conductive channel is established in the optical fiber by utilizing the mechanism in which the thermal conductivity of the material increases as the concentration of the doped ions decreases, thereby accelerating the heat dissipation to prevent heat from accumulating in the center of the core, and effectively preventing the generation of thermal lens effects and reducing photo damage to materials, which improves the output beamquality and the output power; and the preparation method of the core is simple and easy to implement.

Description

technical field [0001] The invention relates to the technical field of optical fiber preparation, in particular to a thulium-doped gain optical fiber and a fiber laser. Background technique [0002] The 2μm laser is called "eye-safe" laser, and has broad prospects in medical surgery, atmospheric monitoring, lidar, remote sensing and other fields. With the development of optical fiber manufacturing technology, fiber lasers based on optical fibers have made significant progress in reducing threshold, oscillation wavelength range, and wavelength tunable performance. Among them, single-frequency fiber laser has many advantages such as long output coherence length, low noise, and compact structure. It has a very broad application prospect in the fields of coherent optical communication, atom trapping, nonlinear frequency conversion, and high-precision spectral measurement. [0003] Thulium-doped fiber laser is a new type of high-power laser, which uses thulium-doped silica fiber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02H01S3/067C03B37/025C03B37/018
CPCC03B37/018C03B37/025G02B6/02395H01S3/06716
Inventor 梁瑶詹凯傅喜泉王洪波潘友华李泊文梁雷
Owner JOINTO TECH CO LTD
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