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Measuring device and method for thermal conversion coefficient of laser amplifier with grazing incidence slab structure

A technology of laser amplifier and slab structure, which is applied in the laser field, can solve the problems such as the inability to measure the heat conversion coefficient, and achieve the effect of simple operation and high accuracy of measurement results

Active Publication Date: 2019-10-18
INNO LASER TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both of the above methods are measured at high pump power extraction and cannot measure the heat transfer coefficient at low extraction

Method used

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  • Measuring device and method for thermal conversion coefficient of laser amplifier with grazing incidence slab structure
  • Measuring device and method for thermal conversion coefficient of laser amplifier with grazing incidence slab structure
  • Measuring device and method for thermal conversion coefficient of laser amplifier with grazing incidence slab structure

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Embodiment 1

[0040] In this embodiment, the detection light source 1 is a HeNe laser with a wavelength of 632 nm, the laser is fundamental mode output, and works in continuous wave mode. The laser beam radius at the laser exit is about 0.3 mm, and the far-field divergence angle is 1.13 mrad. The focal length of the first lens 2 in the telescope system is f 1 =15mm, the distance to the detection light source is 15mm, the focal length f of the second lens 3 2 =70mm, the distance d=f between the first lens 2 and the second lens 3 1 +f 2 =85mm. The beam radius of the probe beam after passing through the telescope system is about 1.5mm, and the far-field divergence angle is 0.25mrad.

[0041] The laser amplifier is an all-solid-state laser with a wavelength of 1064nm, and the working medium of the all-solid-state laser with a wavelength of 1064nm is Nd:YVO 4 Laser crystal 4, that is, slab laser crystal 4 is Nd:YVO 4 laser crystal.

[0042] Nd:YVO 4 The cutting direction of laser crystal ...

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Abstract

The invention discloses a heat transition coefficient measuring device of a grazing incidence lath structure laser amplifier, comprising a laser amplifier having at least a lath laser crystal and a pumping source, a detection light source, a first lens and a second lens, which are disposed in order on the same optical axis along the light direction, and a paper screen vertical to a probe laser optical axis. The distance between the first lens and the second lens is the sum of the focal length between the first lens and the second lens. The probe light passes in order through the first lens andthe second lens and irradiates on the pumping face of the lath laser crystal, and is reflected by the pumping face of the lath laser crystal, forming light spot on the paper screen. The invention isadvantageous in that the device is simple, and the heat transition coefficient of the laser amplifier can be measured in time without a special device or apparatus.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a measuring device and a measuring method for the thermal conversion coefficient of a grazing incidence slat structure laser amplifier. Background technique [0002] In the field of laser technology, it is of great practical significance to measure the thermal conversion coefficient of solid-state lasers. Under different extraction conditions, the thermal conversion coefficient varies greatly, especially for small-signal high-gain all-solid-state lasers, the extraction is low, and the thermal conversion coefficient will be greatly improved. Analyze thermal effects within crystals. The commonly used methods for measuring the thermal transfer coefficient mainly include the unstable cavity method and the second harmonic method. Both of the above methods are measured at high pump power extraction and cannot measure the thermal transfer coefficient at lower extraction. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/00
Inventor 刘崇胡淼
Owner INNO LASER TECH CORP LTD