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A laser with sub-nanosecond Q-switched output by controlling the characteristics of the pump light

A technology of sub-nanosecond tuning and pumping light, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems that cannot be fully satisfied to achieve 1 nanosecond or even sub-nanosecond output, and achieve easy modular production , shorten the cavity length, improve the effect of pumping efficiency

Inactive Publication Date: 2011-12-28
BEIJING UNIV OF TECH
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Problems solved by technology

At present, the output pulse width of typical solid-state Q-switched lasers in China is usually greater than 3ns, and the commonly used method of reducing the cavity length still cannot fully meet the requirements of achieving 1 nanosecond or even sub-nanosecond output

Method used

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  • A laser with sub-nanosecond Q-switched output by controlling the characteristics of the pump light
  • A laser with sub-nanosecond Q-switched output by controlling the characteristics of the pump light
  • A laser with sub-nanosecond Q-switched output by controlling the characteristics of the pump light

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Embodiment Construction

[0016] The present invention is described in detail below in conjunction with accompanying drawing and embodiment:

[0017] Such as figure 1 As shown, the present invention includes: using a semiconductor laser as the pumping source 1, after the pumping light is converged by the fiber coupling device 2, enters the laser gain medium 4 through the rear cavity mirror 3, and the formed laser oscillation passes through the electro-optic Q-switching element 5 and output Mirror 6, forming the laser output. The rear cavity mirror 3, the laser gain medium 4, the electro-optic Q-switching element 5 and the output mirror 6 constitute the laser resonator in this embodiment.

[0018] The pump source 1 is connected to the fiber coupling device 2, and by controlling the polarization state and spatial distribution of the pump light incident on the laser gain medium 4, the pumping efficiency is improved and the resonant cavity is stabilized.

[0019] The resonant cavity is a non-linear cavit...

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Abstract

The invention discloses a laser capable of realizing sub-nanosecond Q-switched output by controlling the characteristics of pump light, and belongs to the technical field of all solid-state lasers. It includes a pump source arranged in sequence along the propagation direction of the light, a fiber coupling device, a rear cavity mirror, a laser gain medium, an electro-optic Q-switching element, and a coupling output mirror, in which the rear cavity mirror, the laser gain medium, the electro-optic Q-switching element and The outcoupling mirror forms a resonant cavity. The pumping source is a semiconductor laser, which outputs pumping light polarized in the π direction. The length of the resonant cavity is less than 30mm. The laser gain medium is Nd with linear polarization absorption characteristics: YVO Crystal, the output end face of the laser gain medium is cut along the a-axis to form a Brewster angle, and the pump end of the laser gain medium passes through the optical surface coating as Rear mirror. The laser has the advantages of simple and compact structure, easy modular production, high output pulse stability and the like.

Description

technical field [0001] The invention belongs to the technical field of all solid-state lasers, and in particular relates to a pulsed laser capable of realizing subnanosecond electro-optic Q-switched output by controlling the characteristics of pumping light. Background technique [0002] High peak power, narrow pulse width Q-switched solid-state laser, due to the small heat-affected area generated during the interaction with matter, makes processing damage less and high precision; at the same time, compared with femtosecond and picosecond lasers, it has high processing efficiency, Advantages of high speed and low cost. Therefore, a laser with a pulse width of 1 nanosecond or sub-nanosecond has broad application prospects in the fields of laser micromachining, nonlinear optics, photoelectric countermeasures, laser three-dimensional scanning, and DNA analysis. [0003] High peak power lasers on the order of nanoseconds are generally generated by Q-switching. The electro-opti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/091H01S3/08H01S3/16H01S3/115
Inventor 李强石坦谢希盈冯驰晏乐伦
Owner BEIJING UNIV OF TECH
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