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End-pumped high-power laser

An end-pumped, high-power technology, used in lasers, laser parts, phonon exciters, etc., can solve problems such as incompatibility, and achieve the effect of improving absorption efficiency, uniform temperature distribution, and improving light-light conversion efficiency.

Inactive Publication Date: 2010-06-02
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method increases the complexity of the laser system on the one hand, and on the other hand it is not suitable for use on all types of lasers

Method used

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Examples

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Embodiment 1

[0038] Example 1. Laser Diode End-Pumped Two-Mirror Cavity Laser

[0039] Such as Figure 5 As shown, it includes a pump source 11, a gain medium 12 and a laser resonator 13, and the gain medium 12 is gradedly doped Nd:YVO 4 Crystal, the crystal has a layered structure of 13 layers, the thickness of the first layer is 3 mm, the thickness of each layer of the last 12 layers is 1 mm, and the doping concentration of each layer is: 0.03%, 0.04%, 0.06%, 0.08%, 0.1% , 0.11%, 0.12%, 0.13%, 0.15%, 0.18%, 0.23%, 0.3%, 0.5%. The light emitted by the pump source 11 passes through the shaping and focusing system 14 to obtain a focused beam 15 , and the focused beam 15 is incident on the gain medium 12 placed in the resonant cavity 13 . The pump source 11 is a laser diode array or a fiber-coupled semiconductor laser, and the center wavelength of light emitted by the pump source 11 coincides with the absorption band of the gain medium 12 . The shaping focusing system is composed of two l...

Embodiment 2

[0040] Embodiment 2. Single-frequency laser with etalon mode selection

[0041] Such as Image 6 As shown, it includes a pump source 11, a gain medium 12, a laser cavity 13 and an etalon 21. The gain medium 12 is a gradedly doped Nd:YAG crystal, and the crystal is a 10-layer layered structure, each layer thickness 2 mm, the doping concentration of each layer is: 0.1%, 0.13%, 0.16%, 0.2%, 0.25%, 0.3%, 0.4%, 0.55%, 0.75%, 1%. The light emitted by the pump source 11 passes through the shaping and focusing system 14 to obtain a focused beam 15 , and the focused beam 15 is incident on the gain medium 12 placed in the resonant cavity 13 . The pump source 11 is a laser diode array or a fiber-coupled semiconductor laser, and the center wavelength of light emitted by the pump source 11 coincides with the absorption band of the gain medium 12 . The shaping focusing system is composed of two lenses, and its function is to shape the pump light into a beam satisfying the mode matching co...

Embodiment 3

[0042] Embodiment 3. Intra-cavity frequency-multiplied single-frequency laser with birefringent filter mode selection

[0043] Such as Figure 7 As shown, the light emitted by the pump source 11 passes through the shaping and focusing system 14 to obtain a focused beam 15, and the focused beam 15 is incident on the gain medium 12 placed in the resonant cavity 13, and the gain medium 12 is made of a gradually doped Nd:YAP crystal. , the crystal has a layered structure of 10 layers, the thickness of the first 5 layers is 1 mm each, and the thickness of the last five layers is 2 mm each, and the doping concentration of each layer is as follows: 0.1%, 0.13%, 0.16%, 0.2%, 0.25%, 0.3%, 0.4%, 0.55%, 0.75%, 1%. The pump source 11 is a laser diode array or a fiber-coupled semiconductor laser, and the center wavelength of light emitted by the pump source 11 coincides with the absorption band of the gain medium 12 . The shaping focusing system is composed of three lenses, and its funct...

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Abstract

The invention provides an end-pumped high-power laser which comprises a pumping source, a gain medium and a laser resonant cavity, wherein a gradient doped crystal is served as the gain medium, and the doping concentration of the crystal is lowest at the pumping end surface of the gain medium; the doping concentration of the crystal is higher and higher as the position of the crystal in the gain medium is far away from the pumping end surface; and the doping concentration is highest at the non-pumping end surface of the gain medium. The end-pumped high-power laser of the invention adopts the gradient doped crystal as the gain medium and has good light beam quality, high light-light conversion efficiency and compact structure.

Description

technical field [0001] The invention relates to an all-solid-state laser, in particular to an end-pumped high-power laser. Background technique [0002] According to the pumping method, lasers can be divided into end-pumped lasers and side-pumped lasers. Side pumping is a traditional pumping method. Its advantage is that the pump light is uniformly distributed along the crystal axis, so the heat is uniformly distributed along the gain medium axis, but its disadvantages are poor mode coverage and high laser threshold ,low efficiency. Compared with side pumping, end pumping can achieve better mode matching between pump light and laser, so it has the advantages of low laser threshold, high pumping efficiency and compact structure. With the demand for high-power lasers in the fields of industry and science and technology, it has become necessary to design end-pumped lasers with high output power, good beam quality and compact structure, and the progress of laser diode design a...

Claims

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Application Information

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IPC IPC(8): H01S3/06H01S3/081H01S3/127H01S3/109
Inventor 郑耀辉王雅君张宽收李凤琴彭堃墀
Owner SHANXI UNIV
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