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A laser based on low beam divergence angle narrow pulse output

A technology of lasers and narrow pulses, which is applied in the field of lasers, can solve the problems of reducing the divergence angle of the laser beam and the adjustment of the length of the resonant cavity, etc., and achieve the effect of good beam quality, small space occupation, and increased length of the resonant cavity

Inactive Publication Date: 2018-12-18
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

However, due to the thermal effect of the crystal, the adjustment of the length of the resonator is not large, so the beam spread angle of the laser output is rarely reduced by increasing the length of the resonator

Method used

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  • A laser based on low beam divergence angle narrow pulse output
  • A laser based on low beam divergence angle narrow pulse output
  • A laser based on low beam divergence angle narrow pulse output

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0030] figure 1 It is a structural schematic diagram of a laser based on low beam divergence and narrow pulse output according to an embodiment of the present invention, as shown in figure 1 As shown, the laser includes a first total reflection mirror 1, a first reflection mirror 3, a first reflection plate 4, a second reflection plate 5, a slab crystal 6, a crystal heat sink 7, a pumping module 8, a second reflection plate Mirror 9, output mirror 10, electro-optic crystal 11, quarter wave plate 12 and the second total reflection mirror 13, wherein:

[0031] The first total reflection mirror 1, the first reflection mirror 3, the second reflection mirror 9 and the output mirror 10 are optically coaxially arranged in seque...

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Abstract

The invention discloses a laser based on low beam divergence angle narrow pulse output, the laser includes a first all-reflective mirror, a first reflection mirror, a first reflector plate, a second reflector plate, lath crystal, crystal heat sink, pumping module, second reflection mirror, Output mirrors, electro-optical crystals, a quarter wave plate and a second all-reflective mirror, wherein the first all-reflective mirror, the first reflection mirror, A second reflection mirror and an output mirror are arranged in order of optical coaxiality, The first reflecting plate, the slab crystal and the second reflecting plate are arranged in sequence and are arranged on one side of the optical axis, and the second all-reflecting mirror, the quarter wave plate, the electro-optical crystal and the output mirror are arranged in sequence and the direction is perpendicular to the optical axis, and the electro-optical crystal and the quarter wave plate constitute a laser resonant cavity loss control module. On the basis of obtaining a low beam divergence angle, the scheme of the invention utilizes cavity emptying technology to make up for the defect that the resonant cavity is too long and affects the pulse width, and has the advantages of small occupying space, good beam quality and high laser efficiency.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a laser based on low beam divergence and narrow pulse output. Background technique [0002] Low-beam divergence narrow-pulse high-peak lasers are widely used in laser ranging, laser processing, laser cutting, laser three-dimensional imaging, laser scanning and other fields. In terms of technical implementation, the laser adopts Q-switching technology to obtain nanosecond laser output, and its divergence angle is usually several milliradians, and then the laser divergence angle is compressed through the beam expander system. For example, when the laser divergence angle is 3mrd and the exit spot is 4mm, the laser divergence angle is compressed by the beam expander system, and when the divergence angle is compressed to 0.3mrad, the spot size must reach 40mm, which will seriously increase the volume and weight of the entire laser system , is not conducive to the miniaturization and l...

Claims

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Application Information

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IPC IPC(8): H01S3/081H01S3/0941H01S3/105H01S3/16
CPCH01S3/105H01S3/0817H01S3/0941H01S3/16
Inventor 王超于永吉金玉石陈薪羽吴春婷董渊王子健李述涛赵璐金光勇
Owner CHANGCHUN UNIV OF SCI & TECH