Tm<3+> self-activated laser crystal and preparation method thereof
A laser crystal, self-activation technology, applied in the direction of lasers, crystal growth, laser components, etc., to achieve the effect of increasing concentration, improving laser efficiency, and reducing laser threshold
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Embodiment 1
[0028] This embodiment discloses a Tm 3+ Self-activated laser crystal ATm(MoO 4 ) 2 , wherein A is selected from at least one of Li, Na and K elements, and, Tm 3+ The ions have a dual role, on the one hand, as activating luminescent ions, on the other hand, as a part of the crystal matrix, thereby greatly increasing its concentration, which is beneficial to Tm 3+ 2 micron fluorescence emission of ions, lowering lasing threshold and increasing laser efficiency. The crystal can be grown by pulling method or molten salt method. Using this kind of crystal as a gain medium and pumping with a semiconductor laser with a central emission wavelength of 760-810nm can achieve high-efficiency infrared laser output near 2 microns, which has important application prospects in medical, scientific research, and military fields.
Embodiment 2
[0030] This embodiment discloses a LiTm(MoO 4 ) 2 Self-activated laser crystals and their growth by pulling method.
[0031] high purity Li 2 CO 3 , Tm 2 o 3 , MoO 3 The raw materials are mixed according to the molar ratio Li:Tm:Mo=1:1:2.1 to form a mixture, and the mixture is placed on a mixer for mixing. The mixing time is 12 hours, and it becomes a uniform powder. Under the pressure of 3Gpa Press it into a cylindrical block with a diameter of 50mm, then put the block into a muffle furnace for sintering, the sintering temperature is 500°C, and the sintering time is 25 hours, and then put the sintered block into a platinum with a diameter of 60mm Put the crucible into the pulling furnace for crystal growth, raise the temperature to 50°C above the melting point, keep the temperature for 2 hours, completely melt the block, and then keep the temperature for 3 hours, the temperature field is constant, and then slowly drop the seed crystal into the melt, Start crystal growt...
Embodiment 3
[0033] This embodiment discloses a NaTm(MoO 4 ) 2 Self-activated laser crystals and their growth by pulling method.
[0034] high purity Na2 CO 3 , Tm 2 o 3 , MoO 3 The raw materials are mixed according to the molar ratio Na:Tm:Mo=1:1:2.2 to form a mixture, and the mixture is placed on a mixer for mixing. The mixing time is 15 hours, and it becomes a uniform powder. Under the pressure of 4Gpa Pressed into a cylindrical block with a diameter of 50mm, and then put the block into a muffle furnace for sintering, the sintering temperature is 520°C, and the sintering time is 30 hours, and then the sintered block is put into a platinum plate with a diameter of 60mm Put the crucible into the pulling furnace for crystal growth, raise the temperature to 50°C above the melting point, keep the temperature for 1 hour, completely melt the block, and then keep the temperature for 2 hours, the temperature field is constant, and then slowly drop the seed crystal into the melt, Start crys...
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