Yellow laser device based on terbium-doped fluoride crystal

A terbium fluoride and laser technology, applied in the field of biomedicine, can solve the problems of low output power of yellow laser, unable to achieve stable output, low stimulated emission cross section, etc., to improve stability, reduce excited state absorption, solve complex effect

Inactive Publication Date: 2019-12-17
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

However, since Tb 3+ Ions have a low stimulated emission cross-section, and there is a non-radiative interaction process between excited state absorption (ESA) plasmons inside the crystal, resulting in Tb-doped 3+ The output power of the yellow laser is small and cannot achieve stable output

Method used

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  • Yellow laser device based on terbium-doped fluoride crystal
  • Yellow laser device based on terbium-doped fluoride crystal
  • Yellow laser device based on terbium-doped fluoride crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Based on the above examples, wherein:

[0045] 1) The beam shaping module 2 selects a prism pair; the focusing lens module 5 selects a single lens;

[0046] 2) The cavity type of the resonant cavity 11 is a linear flat concave cavity; wherein, the input mirror 6 is a flat mirror, and its left end surface is coated with an anti-reflection film with a transmittance greater than 95% for the pumping light, and the right end surface is coated with an anti-oscillating light coating. A high-reflection film with a reflectivity greater than 99.8%; the output coupling mirror 8 is a concave mirror, and its left end surface is coated with a film system that is anti-reflection for the pump light and partially transmits the oscillating yellow light. The output transmittance of the oscillating yellow light is 0.1%~20%, the radius of curvature of the output coupling mirror 8 is 50~200mm;

[0047] 3) The laser gain medium 7 is terbium-doped fluoride crystal Tb 3+ :LaF 3 . Tb 3+ The...

Embodiment 2

[0049] Basically the same as Example 1, the difference is as follows:

[0050] 1) Tb in laser gain medium 7 3+ The doping concentration of ions is 40%;

[0051] 2) The beam shaping module 2 selects a pair of cylindrical mirrors;

[0052] 3) The focusing lens module 5 selects an aspheric lens;

[0053] 4) The cavity type of the resonant cavity 11 is a double concave cavity, the input mirror 6 and the output coupling mirror 8 are both concave mirrors, the curvature radius of the input mirror 6 is 50mm, and the curvature radius of the output coupling mirror 8 is 50-200mm.

[0054] In the following, the comparison tests between the embodiments of the present invention (Example 1 and 2) and other embodiments were also carried out. In other embodiments, the dopant ions and the matrix of the gain medium are mainly different. The results are shown in Table 1 below.

[0055] Table 1

[0056]

[0057] As can be seen from Table 1, comparing the embodiment of the present invention ...

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Abstract

The invention discloses a yellow laser device based on a terbium-doped fluoride crystal. The laser device comprises a pumping system and a resonant cavity, wherein the pumping system comprises a pumping light source, a light beam shaping module, a power adjusting module and a focusing lens module, the resonant cavity comprises an input mirror, a laser gain medium, an output coupling mirror and anoptical filter, and the laser gain medium is a terbium-doped fluoride crystal Tb<3+>:LaF3. The yellow laser is directly generated by utilizing 5D4-7F4 stimulated radiation in Tb<3+>, the nonlinear frequency conversion process is not needed, so a problem that the yellow laser is complex in structure in the prior art is fundamentally solved. The laser medium is Tb<3+>:LaF3, fluoride with low phononenergy is utilized as a doping matrix, and the excited state absorption (ESA) process in the crystal can be reduced. The laser device is advantaged in that a cross relaxation channel does not exist, moreover, the low stimulated emission cross section of Tb<3+> can be made up by increasing the doping concentration of Tb<3+>, and stability of the yellow laser output is improved.

Description

technical field [0001] The invention relates to the field of biomedicine, in particular to a yellow laser based on terbium-doped fluoride crystals. Background technique [0002] Yellow lasers play an important role in biomedical instruments, optical storage, precision measurement, lighting display, and other fields. Especially in biological analysis and clinical treatment, the yellow light laser is the excitation light of fluorescent dyes, and has become the standard light source for flow cytometers and super-resolution microscopes; hemoglobin has a strong absorption peak in the yellow light band, and in capillaries Dilatation and clinical treatment of macular degeneration play an important role. Therefore, obtaining efficient and stable yellow laser has important research significance and application value. [0003] Dye lasers can directly generate yellow light, which is the main method for obtaining yellow laser light in the early days. However, its disadvantages such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/0941H01S3/16
CPCH01S3/0941H01S3/1605H01S3/1645
Inventor 高静李长磊姚文明田玉冰陈建生邓力华檀慧明
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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