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Double-end end-pumped solid laser based on polarization coupling

A solid-state laser and end-pumped technology, which is applied to lasers, laser components, phonon exciters, etc., can solve problems such as uneven thermal load distribution, achieve high conversion efficiency, good beam quality, and increase output power.

Inactive Publication Date: 2011-07-27
SHANXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a dual-end end-pumped solid-state laser based on polarization coupling, which solves the problems of uneven thermal load distribution caused by non-polarized single-end end-pumping, and improves the output power, beam quality and operation stability of the laser.

Method used

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  • Double-end end-pumped solid laser based on polarization coupling
  • Double-end end-pumped solid laser based on polarization coupling
  • Double-end end-pumped solid laser based on polarization coupling

Examples

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Effect test

Embodiment approach 1

[0019] Implementation mode one: figure 1 Shown is a dual-end end-face-pumped four-mirror ring-cavity single-frequency laser based on polarization coupling, including a fiber-coupled output laser diode 1 as a pump source, a collimator lens 2, a polarization beam splitter prism 3, and a half-wave plate 4. Mirror 5, first focusing lens 61, second focusing lens 62, laser gain medium 7 and laser resonant cavity. The pump source 1 is a fiber-coupled output laser diode, the laser output by the fiber is unpolarized light, the output power is 60W, and the central wavelength of the output laser is 880nm; the laser gain medium 7 is a-axis cut, and the doping concentration is 0.3at%. Nd:YVO 4 Laser Crystal, Nd:YVO 4The two transparent surfaces of the crystal are coated with 1.064μm and 880nm double anti-reflection coatings. The absorption coefficient of the crystal for the pump light whose polarization direction is parallel to the c-axis is 4cm -1 , The absorption coefficient of the pu...

Embodiment approach 2

[0020] Implementation mode two: figure 2 Shown is a dual-end end-face pumped three-mirror folded standing-wave cavity single transverse mode laser based on polarization coupling, including a fiber-coupled output laser diode 1 as a pump source, a collimating lens 2, a polarization beam splitter 3, and a half A wave plate 4, mirror 5, first focusing lens 61, second focusing lens 62, laser gain medium 7 and laser resonant cavity. The pump source 1 is a fiber-coupled output laser diode, the laser output by the fiber is unpolarized light, and the central wavelength of the output laser is 797nm; the laser gain medium 7 is an a-axis cut Nd:YLF laser with a doping concentration of 0.5at%. Crystal, the absorption center wavelength of the pump light whose polarization direction is parallel to the c-axis is 792nm, and the absorption center wavelength of the pump light whose polarization direction is perpendicular to the c-axis is 797nm; the two transparent surfaces of the Nd:YLF crystal...

Embodiment approach 3

[0021] Implementation mode three: image 3 Shown is a dual-end pumped six-mirror ring-cavity single-frequency frequency-doubled laser based on polarization coupling, including a fiber-coupled output laser diode 1 as a pump source, a collimating lens 2, a polarization beam splitter 3, and one-half Wave plate 4, mirror 5, first focusing lens 61, second focusing lens 62, laser gain medium 7 and laser resonant cavity. The pump source 1 is a fiber-coupled output laser diode, the laser output by the fiber is unpolarized light, the output power is 60W, and the central wavelength of the output laser is 880nm; the laser gain medium 7 is a-axis cut, and the doping concentration is 0.3at%. Nd:YVO 4 Laser Crystal, Nd:YVO 4 The two transparent surfaces of the crystal are coated with 1.064μm and 880nm double anti-reflection coatings. The absorption coefficient of the crystal for the pump light whose polarization direction is parallel to the c-axis is 4cm -1 , The absorption coefficient o...

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Abstract

The invention provides a double-end end-pumped solid laser based on polarization coupling, comprising a pumping source (1), a collimating lens (2), a polarization splitting prism (3), a one-half wave plate (4), a reflector (5), a focusing lens, a laser gain medium (7) and a laser resonant cavity. The pumping source (1) is a filter coupling output laser diode and outputs non-polarized laser; and the laser gain medium (7) is an anisotropic uniaxial crystal. The non-polarized laser output by the fiber coupling output laser diode is decomposed into two beams of polarized laser through a polarized beam splitter prism, respectively coupled into the gain medium from both end surfaces of the gain medium through an optical system so that the polarization direction of the pumping laser entering the gain medium is parallel to a certain optical axis in the laser gain medium, and double-end polarized laser end-pumping is realized. The invention can overcome the problems of thermal load distribution unevenness, and the like caused by non-polarized one-end end-pumping so as to improve the output power, the beam quality and the operation stability of the laser.

Description

technical field [0001] The invention relates to an all-solid-state laser, in particular to a polarization-coupling-based double-end pumped solid-state laser. Background technique [0002] Laser technology with lasers as the core plays an increasingly important role in the progress and development of advanced manufacturing and related industries, science and technology, medical technology and national defense technology. With the improvement of laser diode production and packaging technology, laser diode-pumped solid-state lasers have developed rapidly. This type of device not only makes the solid-state laser truly all-solid-state, but also has the advantages of high efficiency, long life, compact structure, and stable frequency. Laser diode-pumped solid-state lasers can be end-pumped lasers and side-pumped lasers according to the pump coupling method. The advantage of the side-pumped laser is that the pump light is uniformly distributed along the axial direction of the gai...

Claims

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Application Information

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IPC IPC(8): H01S3/16H01S3/094H01S3/11H01S3/109
Inventor 张宽收刘建丽彭堃墀
Owner SHANXI UNIV
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