Ytterbium-erbium co-doped fluoride fluorescent powder with optical bistable characteristic and preparation method thereof

Abstract

The invention discloses ytterbium-erbium co-doped fluoride fluorescent powder with an optical bistable state characteristic, the ytterbium-erbium co-doped fluoride fluorescent powder contains three-phase substances, the three-phase substances are BaF2, LiBaF3 and Ba4Yb3F17 respectively, the chemical general formula is Li < 0.4 > Ba < 0.6-0.2-xF3: 0.2 Yb < 3 + > and xEr < 3 + >, Yb < 3 + > is a rare earth sensitized ion, Er < 3 + > is a rare earth activated ion, x is the doping concentration of Er < 3 + >, and x is more than 0 and less than or equal to 2.0 mol%. The preparation method comprises the following steps: weighing the lithium carbonate, the barium carbonate, the ammonium bifluoride, the erbium oxide and the ytterbium oxide with quantitative mole numbers respectively, pouring into an agate mortar, and fully grinding until all the raw materials are uniformly mixed; transferring the ground powder into an alumina crucible, putting the alumina crucible into a high-temperature furnace, raising the furnace temperature to 600 DEG C, and keeping the constant temperature for 300 minutes at the heating rate of 10 DEG C / min; and after the temperature in the furnace is naturally cooled to room temperature, taking out the reacted product, transferring the reacted product into an agate mortar, and fully grinding the reacted product into nanoscale powder again.

Description

technical field [0001] The invention relates to a rare earth-doped fluoride nano-fluorescent powder, in particular to an ytterbium-erbium co-doped fluoride fluorescent powder with optical bistable properties and a preparation method thereof. Background technique [0002] In 1969, A. Szöke et al first proposed the concept of intrinsic optical bistability. In 1976, H. M. Gibbs et al. input a tunable dye laser into an F-P etalon filled with Na vapor, and observed the optical bistability phenomenon. Since then, the phenomenon of optical bistability has been discovered successively by researchers in different media. Because optical devices made of intrinsic optical bistable materials can directly process optical signals, and have the advantages of large bandwidth (>103 Hz), short switching time (<1 Ps), and parallel processing of signals, they have been widely used in high-speed optical fibers. Communications, fast optical switches, all-optical logic gates, optical commun...

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Problems solved by technology

However, there have been no relevant reports on fluoride fluorescent materials that can exhibit excellent optical bistability characteristics only by doping with ytterbium and erbium.

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