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Chromium-yttrium-scandium-doped near-infrared band ultrafast and ultrastrong laser crystal as well as preparation method and application thereof

A laser crystal, near-infrared technology, applied in crystal growth, chemical instruments and methods, single crystal growth and other directions, can solve the problems of insufficient laser pulse width, low LD pumping laser efficiency, high thermal lens effect, etc. High-power laser operation, good application prospects, and high damage resistance threshold

Pending Publication Date: 2022-07-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most researched ultrafast laser crystal that has entered the application field is Cr 3+ :BeAl 2 o 4 (Alexandrite), Cr 3+ :LiCaAlF 6 and Cr 3+ :LiSrAlF 6 , but considering factors such as the tunable wavelength range, absorption coefficient, emission cross section, pumping method and growth process of the crystal, there is currently no crystal that can well meet people's needs
[0005] Cr 3+ :BeAl 2 o 4 The main disadvantages of (alexite) crystals are: the emission spectrum ranges between 700-800nm, the spectral width is not large enough to produce a laser pulse width that is not small enough, and the emission cross section is small (6×10 -21 cm 2 ), the required pumping threshold is high, and it also has the disadvantages of high damage rate and high thermal lens effect. In addition, because BeO is highly toxic, it also brings great difficulties to growth.
However, there are also problems such as small absorption coefficient, low laser efficiency of LD pumping and poor mechanical properties.

Method used

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  • Chromium-yttrium-scandium-doped near-infrared band ultrafast and ultrastrong laser crystal as well as preparation method and application thereof
  • Chromium-yttrium-scandium-doped near-infrared band ultrafast and ultrastrong laser crystal as well as preparation method and application thereof
  • Chromium-yttrium-scandium-doped near-infrared band ultrafast and ultrastrong laser crystal as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: Cr 0.005 Y 1 Sc 0.995 O 3 crystal

[0044] The initial raw material is Cr 2 O 3 , Y 2 O 3 , Sc 2 O 3 Polycrystalline powder, after selecting a specific concentration of Cr ions to replace Sc ions, according to the chemical formula Cr 0.005 Y 1 Sc 0.995 O 3 The required mass of each raw material is calculated and accurately weighed, grown and crystals are obtained.

[0045] like figure 2 Shown is the prepared Cr 0.005 Y 1 Sc 0.995 O 3 The X-ray powder diffraction pattern of the sample shows that the Cr-doped 3+ YScO 3 It is still a single crystal phase and belongs to the cubic crystal system. figure 2 shows the XRD powder diffractogram of the chromium-doped yttrium scandium crystal with Y 2 O 3 The powder diffraction pattern of the crystal is compared, and the results show that the crystal structure of yttrium scandium is more consistent with the crystal structure of yttrium oxide, so the crystal properties are very similar to yttrium o...

Embodiment 2

[0051] Example 2: Cr 0.01 Y 1 Sc 0.99 O 3 crystal

[0052] The initial raw material is Cr 2 O 3 , Y 2 O 3 , Sc 2 O 3 Polycrystalline powder, after selecting a specific concentration of Cr ions to replace Sc ions, according to the chemical formula Cr 0.01 Y 1 Sc 0.99 O 3 The required mass of each raw material is calculated and accurately weighed, grown and crystals are obtained.

Embodiment 3

[0053] Example 3: Cr 0.001 Y 1 Sc 0.999 O 3 crystal

[0054] The initial raw material is Cr 2 O 3 , Y 2 O 3 , Sc 2 O 3 Polycrystalline powder, after selecting a specific concentration of Cr ions to replace Sc ions, according to the chemical formula Cr 0.001 Y 1 Sc 0.999 O 3 The required mass of each raw material is calculated and accurately weighed, grown and crystals are obtained.

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Abstract

The invention relates to a chromium-yttrium-scandium-doped near-infrared band ultrafast and ultrastrong laser crystal and a preparation method and application thereof.The chemical formula of the crystal is Y (Sc1-xCrx) O3, the value range of x is 0.00001-0.3, the crystal belongs to a cubic system, the cell parameters are a = b = c = 10.18802, and the crystal has the high melting point (larger than 2000 DEG C), the low phonon energy (400 cm <-1 >) and the excellent mechanical performance. And growing by adopting a floating zone method or an edge-defined film-fed growth method. Compared with the prior art, the crystal material disclosed by the invention can realize efficient tunable and ultrafast laser output, and the peak power of ultrashort pulse laser can reach dozens of pat watts, hundreds of billions of electron volts and even tens of trillions of electron volts through a chirped pulse amplification (CPA) technology, so that the crystal material is the brightest light source in current human cognition. Under the laser characteristic, the interaction between the laser and the substance can enter an unprecedented field with strong relativistic property and high nonlinearity, and has great application potential and value in the aspects of laser fusion, ion acceleration, high-energy physics and the like.

Description

technical field [0001] The invention relates to the technical field of laser materials, in particular to a chromium-doped yttrium scandium near-infrared band ultrafast and ultra-intensive laser crystal and a preparation method and application thereof. Background technique [0002] Ultrafast and ultra-intensive laser refers to a special light field with ultra-fast time domain characteristics and ultra-high peak power characteristics at the same time, creating unprecedented ultra-fast time, ultra-high-intensity field, ultra-high temperature and ultra-high power in the laboratory for human beings. Extreme physical conditions such as pressure have greatly promoted the development and progress of cutting-edge sciences such as physics, chemistry, biology, materials, medicine, and interdisciplinary science. It can be considered that ultrafast and ultra-intensive lasers are one of the most important tools for the frontier basic scientific research used to expand human cognition, and...

Claims

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Application Information

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IPC IPC(8): C30B29/16C30B13/00
CPCC30B29/16C30B13/00
Inventor 徐军李健达董建树王庆国唐慧丽薛艳艳
Owner TONGJI UNIV