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Method for implementing low pump power density and continuous light pump laser

A technology of power density and laser, applied in the field of laser, can solve the problems of high dispersion and incompatibility, and achieve the effect of reducing the laser threshold, improving the pumping efficiency, and reducing the pumping power density

Active Publication Date: 2009-05-27
FUZHOU PHOTOP QPTICS CO LTD
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  • Abstract
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Problems solved by technology

Harvesting sunlight using Fresnel lenses is flawed because most lenses are not suitable for focusing broad-spectrum solar radiation due to high dispersion

Method used

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  • Method for implementing low pump power density and continuous light pump laser
  • Method for implementing low pump power density and continuous light pump laser
  • Method for implementing low pump power density and continuous light pump laser

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Embodiment Construction

[0042] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0043] Such as Figure 1a As shown, 101A, 101B, and 101C constitute a composite thin gain medium microchip, wherein 101B is a laser gain medium sheet, and 101A and 101C can be ordinary and laser gain medium matrix materials or their optical materials, and can also produce up-conversion or conversion fluorescence. material, cavity mirror S1 and cavity mirror S2 constitute the laser cavity surface. 102 is an optical material that can generate up-conversion or down-conversion fluorescence, S3 is a broadband reflection film or a reflection surface, 103 is a focusing lens, and 104 is a pumping beam.

[0044] Principle of the present invention is: because surface solar energy density is low, its spectrum is continuous spectrum, and band is wider, as Figure 1b A graph of the solar spectrum is shown. Most of the media used to generate laser gain, especial...

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Abstract

The invention relates to the field of laser, in particular to a method for realizing low pumping power density and a continuous optical pumping laser. The method takes convergent sunlight or light given out by continuous light sources as a pumping source, and adopts a thin or ultrathin laser gain medium to form a microchip laser or a rod-shaped laser. Optical materials which are doped with other ions are arranged on the circumference of the laser gain medium to absorb partial pumping light and give out upper transformed fluorescent light or lower transformed fluorescent light, and partial upper transformed fluorescent light or partial lower transformed fluorescent light is absorbed by the laser gain medium, so that the overall absorption efficiency is improved; and simultaneously a reflecting surface of a laser-cavity mirror is perpendicular to the surface of the thin gain medium, so that the power density of a laser cavity is strengthened and the laser start-oscillation threshold is reduced. The method can adopt a single microchip laser or a single rod-shaped laser, and can also adopt a plurality of groups of microchip lasers to be arranged on focus points of the pumping light.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a method for realizing low pumping power density and continuous light pumping lasers. Background technique [0002] The idea of ​​using sunlight as pump light to generate laser light has been proposed for many years, but the main difficulty is that the effective pump power density is not high and the laser generation efficiency is too low. A series of reflectors are used to project sunlight onto the Nd:YAG crystal to obtain laser output under certain conditions. But such lasers require huge mirrors to collect sunlight and are extremely inefficient, so they are not widely used. Japanese scientists used Fresnel lenses instead of reflectors to collect sunlight, and also found that Nd:YAG crystals doped with a small amount of chromium can improve laser output. Harvesting sunlight using Fresnel lenses is flawed because most lenses are not suitable for focusing broad-spectrum solar radiation du...

Claims

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Application Information

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IPC IPC(8): H01S3/091
Inventor 吴砺凌吉武卢秀爱陈燕平
Owner FUZHOU PHOTOP QPTICS CO LTD
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