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Fiber-coupled output diode end-pumped and Tm-doped (thulium-doped) slab solid-state laser

A solid-state laser and optical fiber coupling technology, which is applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problem of low laser beam brightness, achieve good stability, good output laser beam quality, and compact structure.

Active Publication Date: 2015-06-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low brightness of the laser beam output by lasers currently using slab-shaped Tm crystals. The present invention provides a single-doped Tm slab solid-state laser that is fiber-coupled and output diode end-pumped

Method used

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  • Fiber-coupled output diode end-pumped and Tm-doped (thulium-doped) slab solid-state laser

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specific Embodiment approach 1

[0014] Specific implementation mode one: combine figure 1 Describe this embodiment mode, the fiber-coupled output diode end-pumped single-doped Tm slab solid-state laser described in this embodiment mode, it comprises the first total reflection mirror 1, single-doped Tm crystal 2, the second total reflection mirror 3, F-P an etalon 4, a laser output coupling mirror 5 in the 2 μm band, a first diode semiconductor laser 6 and a second diode semiconductor laser 7;

[0015] The first semiconductor laser 6 and the second semiconductor laser 7 are arranged oppositely, and the output optical axes of the two coincide, and the first total reflection mirror 1, the single-doped Tm crystal 2 and the second total reflection mirror 3 are located at the first semiconductor laser. Between the laser 6 and the second semiconductor laser 7;

[0016] The pumping light emitted by the first diode semiconductor laser 6 is incident on the first total reflection mirror 1, and the pumping light transm...

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment is a further limitation of the fiber-coupled output diode end-pumped single-doped Tm slab solid-state laser described in Embodiment 1. The first total reflection mirror 1 is a flat mirror, and the The mirror surface of the flat mirror is coated with a film with high transparency to the pump light, and the film forms total reflection to the laser in the 2 μm band, and the critical angle of the total reflection is 0°,

[0025] The laser light in the 2 μm band transmitted by the single-doped Tm crystal 2 is vertically incident on the first total reflection mirror 1 .

specific Embodiment approach 3

[0026] Embodiment 3: This embodiment is a further limitation of the fiber-coupled output diode end-pumped single-doped Tm slab solid-state laser described in Embodiment 2,

[0027] The second total reflection mirror 3 is a flat mirror, and the mirror surface of the flat mirror is coated with a film that is highly transparent to the pump light, and the film forms a total reflection of the laser in the 2 μm band, and the total reflection The critical angle is 45°,

[0028] The incident angle of the laser in the 2 μm waveband to the second total reflection mirror 3 is equal to 45°.

[0029] The two pumping lights are respectively incident from the 0°2μm total reflection mirror and the 45°2μm total reflection mirror, and then injected into the single-doped Tm crystal 2.

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Abstract

A fiber-coupled output diode end-pumped and Tm-doped (thulium-doped) slab solid-state laser relating to a solid-state laser aims to solve the problem in an existing laser that brightness of a laser beam output by the existing laser of a slab-shaped Tm (thulium) crystal is low. End pumping is used as the pumping method; a first semiconductor laser and a second semiconductor laser are oppositely disposed, and an output axis of the first semiconductor laser coincides with that of the second semiconductor laser; a mirror with the incidence of 0 degree and the wavelength of 2 microns, a Tm-doped crystal and a mirror with the incidence of 45 degrees and the wavelength of 2 microns are disposed between the first semiconductor laser and the second semiconductor laser; the mirror with the incidence of 0 degree and the wavelength of 2 microns, the mirror with the incidence of 45 degrees and the wavelength of 2 microns and a laser output coupling mirror of the wave band of 2 microns are disposed according to an L-shaped structure; and the output coupling mirror can obtain the laser output of 2 microns of single wavelength by tuning the angle of an F-P (Fabry-Perot) etalon. The fiber-coupled output diode end-pumped and Tm-doped slab solid-state laser is used for obtaining the laser of the single wavelength of 2 microns.

Description

technical field [0001] The invention relates to a solid-state laser, in particular to a single-doped Tm slab solid-state laser which is pumped by a fiber-coupled output diode. Background technique [0002] Water molecules have a strong absorption of 2-micron laser light, so it can be used as a light source for medical laser scalpels, and has important application value in laser medicine. The single-doped Tm crystal has a large gain in the 2μm band, and is suitable as a gain medium for generating 2μm lasers. Single-doped Tm solid-state lasers convert about 25% of the pump power into waste heat during operation, so traditional rod or bulk crystals are difficult to operate stably at high power. The slab-shaped Tm crystal is suitable for heat dissipation, and can obtain high-power 2μm band laser, but its output spot is line-shaped, and the beam quality factor is M 2 The value is usually above 30, and the brightness of the laser beam is low, which is not convenient for the prac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/16H01S3/0941
Inventor 姚宝权段小明鞠有伦王月珠
Owner HARBIN INST OF TECH