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1319nm laser passively Q-switched all-solid state laser

A laser and all-solid-state technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of pulsed lasers with a large minimum pulse width and failure to meet the requirements, and achieve large ground state absorption cross-sectional area, low cost, and Effect of good thermomechanical properties

Inactive Publication Date: 2015-12-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

In addition, compared with the active Q-switching technology, passive Q-switching is simpler and more convenient, because passive Q-switching requires small components and does not require an external drive device, Co 2+ :YAG, V 3+ : Both YAG and semiconductor saturable absorption mirrors are used as Q-switched devices for 1.3μm lasers, the literature "Diode-end-pumpedpassivelyQ-switched1319nmNd:YAGceramiclaserwithaV 3+ The use of V 3+ :YAG is a passively Q-switched Nd:YAG ceramic laser with a saturable absorber. The working wavelength is 1319nm. The application of short-pulse lasers does not meet the requirements

Method used

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  • 1319nm laser passively Q-switched all-solid state laser

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Embodiment 1

[0016] Embodiment 1 of the present invention such as figure 1 As shown, a 1319nm laser passively Q-switched all-solid-state laser, including pumping source 1, coupling lens group 2, laser crystal 4, saturable absorber 5, input mirror M1, output mirror M2 and temperature control system, pumping source 1 Located in front of the coupling lens group 2, after the coupling lens group 2, the resonant cavity is composed of the input mirror M1 and the output mirror M2, and the laser crystal 4 and the saturable absorber 5 are placed in sequence in the resonant cavity, and the laser crystal 4 is wrapped with indium foil and placed in an aluminum block The temperature control system adopts a water-cooling method to keep its temperature constant. The input end face of the input mirror M1 is a plane, and the output end face is a concave surface; the two end faces of the output mirror M2 are planes. The absorber 5 adopts Co:LMA crystal, and the two ends of the Nd:YAG ceramic crystal are coat...

Embodiment 2

[0021] A 1319nm laser passively Q-switched all-solid-state laser, including a pump source, a coupling lens group, a laser crystal, a saturable absorber, an input mirror M1, an output mirror M2, and a temperature control system. The pump source is located in front of the coupling lens group, and the coupling lens After the group, the resonant cavity is composed of the input mirror M1 and the output mirror M2. The laser crystal and the saturable absorber are placed in sequence in the resonant cavity. The laser crystal is wrapped with indium foil and placed in an aluminum block, and the temperature control system uses water cooling to keep its temperature constant. The input end face of the input mirror M1 is flat, and the output end face is concave; the two end faces of the output mirror M2 are flat, which is characterized in that the laser crystal adopts Nd:YAG ceramic crystal, the saturable absorber adopts Co:LMA crystal, Nd:YAG ceramic crystal two The end is coated with a diel...

Embodiment 3

[0026] Same as embodiment 1, except that the front of the output mirror M2 is coated with a dielectric film with a light transmittance of T=2.5% for 1319nm and a light transmittance of T=93% for 1064nm wavelength.

[0027] The laser crystal Nd: YAG ceramic Nd 3+ The doping concentration is 1.5at%.

[0028] The saturable absorber is a Co:LMA crystal with a width of 6mm, a height of 6mm, and a length of 0.7mm. The initial transmittance of the Co:LMA crystal is 90%.

[0029] The pumping source is a fiber-coupled semiconductor laser with a core diameter of 300 μm, a numerical aperture of 0.23, and a spot radius of 200 μm irradiated on the crystal.

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Abstract

The invention relates to a 1319nm laser passively Q-switched all-solid state laser and belongs to the solid state laser technical field. The 1319nm laser passively Q-switched all-solid state laser comprises a pump source, a coupling lens group, a resonant cavity and the like. A laser crystal and a saturable absorber are arranged in the resonant cavity. A temperature control system maintains constant temperature for the crystal and the devices. The 1319nm laser passively Q-switched all-solid state laser is characterized in that a Co:LMA crystal is adopted as the saturable absorber to perform Q-switching on a Nd:YAG ceramic laser, so that 1.3-micron m short pulse laser output can be obtained, and ultimately, average power can be 1.58W, and shortest pulse width can be 23ns. The 1.3-micron m short pulse laser generated by the laser of the invention has near-zero dispersion in a silica optical fiber and has low loss. The laser of the invention can be widely applied to optical fiber communication, and can play an important role in medical aspects such as pulmonary metastases and dentistry.

Description

technical field [0001] The invention relates to a 1319nm laser passive Q-switching all-solid-state laser, which belongs to the technical field of solid-state lasers. Background technique [0002] The 1.3μm laser has very important applications. First of all, 1.3μm laser has near-zero dispersion and low loss in quartz fiber, and is widely used in optical fiber communication. According to existing reports, 1.3μm laser also plays an important role in lung metastases and dentistry. In addition, 1.3μm laser Red light and 1.5μm eye-safe laser can be obtained respectively by frequency doubling conversion and Raman scattering. [0003] At present, the usual means of obtaining 1.3μm laser is to use Nd 3+ of 4 f 3 / 2 - 4 f 13 / 2 Energy level conversion, such as Nd:YAG, Nd:YLF, Nd:YVO4 and Nd:YAG ceramics, Nd:YAG is the most widely used gain medium in solid-state lasers, but Nd:YAG ceramics have superior performance. In the existing reports, the research on Nd:YAG ceramics mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/0941H01S3/067H01S3/106
Inventor 李平宋腾陈晓寒敦洋洋
Owner SHANDONG UNIV
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