Preparation method of praseodymium-ytterbium co-doped fluorine-aluminum glass with light-emitting broadband of 3.5 microns

Abstract

The invention relates to a preparation method of praseodymium-ytterbium co-doped fluorine-aluminum glass with a light-emitting broadband of 3.5 microns, which comprises the steps of weighing chemicalraw materials according to mole percentage, and sufficiently grinding and mixing; putting the mixed raw materials into a crucible, and melting and firing the mixed raw materials in a glove box througha high-temperature furnace at the temperature of 930 DEG C; and pouring the molten liquid into a copper plate mold preheated at the temperature of 370 DEG C, keeping the temperature for 3 hours, andthen slowly cooling to room temperature to obtain praseodymium-ytterbium co-doped fluorine-aluminum glass with different concentrations. The glass prepared by the invention has good deliquescence resistance; the preparation process is simple, and batch production can be realized; the glass has good spectral transmission width and transmission performance, and has no obvious visible transmittance reduction condition at a water molecule absorption position; the broadband 3.5[mu]m light emitting performance is achieved, and light emitting can be achieved through a simple and reliable 976nm laserpump; and the glass has an important application prospect in the field of realizing high-power 3.5[mu]m fiber laser.

Description

Technical field [0001] The present invention belongs to the infrared light-emitting glass, fiber art infrared laser, particularly relates to a method for preparing aluminum fluoride glass in a broadband 3.5 micron light emitting praseodymium Yb co-doped. Background technique [0002] 3-5μm range of mid-infrared lasers because the window is minimized atmospheric attenuation and received wide attention of domestic and foreign. Many organic molecules and the absorption of the gas in the region, to ensure the application of infrared lasers for space communications, atmospheric monitoring, spectroscopy, defense and other fields. Currently, there are infrared laser light generated in the two techniques: the first is based on non-linear optical effects, including optical parametric oscillation and difference-frequency generation. These lasers typically complicated structure, low efficiency of the electro-optic crystal optical parametric oscillator preparation process complicated. The se...

AI Technical Summary

Problems solved by technology

On the other hand, the research on single-wavelength pumping of erbium ions started as early as 1992, but due to the high cost of dye lasers or semiconductor lasers and the limitation of use conditions, the research progress was slow.

Although people have found some ways to improve the pumping efficiency through theoretical analysis, the 3.5 μm fiber laser doped with erbium ions still has the problems of high cost and complicated installation

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