All-solid-state yellow laser based on double-doped crystal

Abstract

The invention discloses an all-solid-state yellow laser based on double-doped crystals, comprising: a pumping system and a resonant cavity, and the pumping system includes two semiconductor lasers, two beam shaping modules, a polarization combining module and a focusing lens module ; The double-doped laser gain medium includes Dy 3+ Doped oxide matrix and auxiliary dopant ions. The present invention utilizes Dy 3+ middle 4 f 9 / 2 → 6 h 13 / 2 The stimulated radiation of the yellow light directly produces yellow laser without nonlinear frequency conversion process, which fundamentally solves the problem of the complicated structure of the current all-solid-state yellow laser; the laser medium of the present invention adopts double-doped oxide crystals, through sub-relaxation accelerated 6 h 13 / 2 population consumption of energy levels; co-doped ions (Tb 3+ / Eu 3+ ) is introduced to realize the energy transfer of the lower energy level of the laser, reducing the 6 h 13 / 2 The energy level life of the laser achieves the rapid inversion of the number of particles and improves the stability of the yellow laser output.

Description

technical field [0001] The invention relates to the field of biomedicine, in particular to an all-solid-state yellow laser based on double-doped crystals. Background technique [0002] All solid-state 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, i...

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Problems solved by technology

However, since Dy 3+ The ions have a low stimulated emission cross-section and the particles at the lower energy level of the laser cannot relax rapidly to the ground state, resulting in single-doped Dy 3+ The output power of the yellow laser is too small to achieve efficient and stable continuous operation

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