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A femtosecond laser crystal doped with ytterbium rare earth tantalate and its preparation method

A femtosecond laser, tantalate technology, applied in lasers, crystal growth, laser parts and other directions, can solve the problem of non-uniform spectral broadening, and achieve the effect of wide emission spectral bandwidth

Active Publication Date: 2021-08-06
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Yb 3+ Doped rare earth tantalate crystals (Yb 3+ :RETaO 4 , where RE is La, Sc, Lu or Y) belongs to the monoclinic symmetric crystal system, Yb in the crystal 3+ Replace RE 3+ in C 2 On a symmetrical lattice point, it coordinates with the surrounding 8 oxygen atoms to form a distorted dodecahedron, resulting in Yb 3+ Being in a strong field coupling static field with broken symmetry will cause non-uniform broadening of the spectrum, which is conducive to the generation of ultrashort pulse laser; in addition, the physical and chemical properties of this crystal are stable, the mechanical processing performance is good, and the thermodynamic performance is good. This kind of crystal shows good practical value and application potential. At present, there is no report on the preparation of ytterbium-doped rare earth tantalate femtosecond laser crystal at home and abroad.

Method used

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  • A femtosecond laser crystal doped with ytterbium rare earth tantalate and its preparation method
  • A femtosecond laser crystal doped with ytterbium rare earth tantalate and its preparation method
  • A femtosecond laser crystal doped with ytterbium rare earth tantalate and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0040] A blended rare earth niobate femtosecond laser crystal, specifically, grown doped YB 3+ YB: YTAO of 1 at% concentration 4 Crystals. YB in this example 3+ The concentration is 1 at%, that is, molecular YB x RE 1-x Tao 4 The medium x = 0.01, the RE is Y element. Put the high-purity oxide feedstock according to chemical reaction 0.01YB 2 O 3 + 0.99Y 2 O 3 + TA 2 O 5 = 2yb 0.01 Y 0.99 Tao 4 Accurately weigh 1000g, then mix the raw materials uniformly mixed with the block, and use high temperature solids to sinter at 1550 ° C for 48 hours to get yb: ytao 4 The polycrystalline raw material, then incorporates the baked polycrystalline raw material in a diameter of 60 mm, high of 60 mm, and the golden crucible is placed in a laser transistor flare, closing the furnace door and pulls the furnace into vacuum (low) After 10PA) After the nitrogen was fired as a protective gas, the raw material was melted, and the raw material was melted. After the raw material was completely melted, th...

Embodiment 2

[0043] 970nm semiconductor laser pump YB 3+ : Retao 4 The crystal element is used as a SESAM prism as a saturable absorber, and an experimental apparatus for femtosecond laser output is achieved by a phase-locked manner. Experimental device Figure 7 Indicated. 1 is a semiconductor laser, and the light emitted by 2 fiber coupler and 3 focusing gathers to 6 crystal surface, then 4 plane two-color medium mirror, 5 concave mirror, 7 concave mirror, 8 concave mirror, is a set of mirror configurations. The resonance cavity is used to optically oscillate out of the laser, 9 is a saturated absorber to compress the generated laser pulse compression into femtosecond laser, 10, 11 is a set of dispersion compensation in the resonant cavity of a set of three prisms, 12 is final realization Laser output mirror of second laser.

[0044] Due to the laser experiment, the crystal absorbs the pump laser energy will result in more waste heat, so in the laser experiment, Yb needs to be 3+ : Retao 4 Th...

Embodiment 3

[0046] A blended rare earth niobate femtosecond laser crystal, specifically, grown doped YB 3+ YB: latao concentration of 5 at% 4 Crystals. YB in this example 3+ The concentration is 5 at%, that is, molecular YB x RE 1-x Tao 4 The X = 0.05, RE is LA element. Put the high purity oxide raw material according to chemical reaction 0.05Yb 2 O 3 + 0.95LA 2 O 3 + TA 2 O 5 = 2yb 0.05 La 0.95 Tao 4 Accurately weigh 1000g, then mix the raw materials uniformly mixed with the pressure block, and use high temperature solids to sinter in 1550 ° C for 48 hours to obtain Yb: Latao 4 The polycrystalline raw material, then incorporates the baked polycrystalline raw material in a diameter of 60 mm, high of 60 mm, and the golden crucible is placed in a laser transistor flare, closing the furnace door and pulls the furnace into vacuum (low) After 10PA) After the nitrogen was fired as a protective gas, the raw material was melted, and the raw material was melted. After the raw material was completely m...

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Abstract

The invention provides a femtosecond laser crystal doped with ytterbium rare earth tantalate, a preparation method thereof, and a semiconductor pumping method for realizing femtosecond laser output, and relates to the technical fields of functional crystal materials and ultrafast lasers. This type of laser crystal has a monoclinic symmetrical structure, and the components of the melt are consistent and eutectic, and can be prepared with high quality by the crystal preparation process of the melt method. The chemical formula of the crystal is Yb 3+ :RETaO 4 , the molecular formula is Yb x RE 1‑x TaO 4 , where RE is La, Sc, Lu or Y; 0 <x<1；简写为yb:reto。由于掺杂的yb3+ ions are in a symmetry-broken strong field coupled static field in the rare earth tantalate crystal, which is conducive to partially releasing the parity transition prohibition of doped ytterbium ions, and increases the Stark energy level splitting of doped ytterbium ions , so that the crystal has a very wide emission spectral bandwidth, so it is very suitable for femtosecond pulsed laser output and application by semiconductor laser pumping mode-locking or Q-switching.< / x<1；简写为yb:reto。由于掺杂的yb

Description

Technical field [0001] The present invention relates to a functional crystal material and a full solid state laser technology, and more particularly to a doping having ultra-wide emission spectrum bandwidth (YB 3+ Rare Earth Biraphate femtosecond laser crystals and preparation methods thereof and semiconductor pumps realize femtosecond laser output mode. Background technique [0002] Since the birth of the first femtosecond dye laser in the 1980s, after nearly 40 years of development, the ultra-fast laser (femtosecond laser) has become one of the important emerging industries in the world's national economic development, in the industry. Processing and advanced manufacturing, communications and information, medical, military sciences play an irreplaceable role, and ultra-fast optical and ultra-fast laser technology has become one of the most active hotspots in optical and laser and physics and information sciences. It is the latest development frontier and key competition in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/16C30B29/30C30B15/00
CPCC30B15/00C30B29/30H01S3/1618H01S3/1671
Inventor 丁守军黄仙山唐绪兵
Owner ANHUI UNIVERSITY OF TECHNOLOGY