Tm3+ doping-based fluoride glass microsphere laser

Abstract

The invention relates to a Tm3+ doping-based fluoride glass microsphere laser, which belongs to the field of solid lasers and mainly comprises a micro-nano optical fiber, a fluoride glass microsphereof the ZYA doped with Tm3+, a pump source and a spectrometer. The pump source, the micro-nano optical fiber, the fluoride glass microsphere of the ZYA doped with Tm3+ and the spectrometer are coupledby a single-mode optical fiber in sequence. The method adopts a CO2 laser micromachining mode to prepare the fluoride glass microsphere of the ZYA doped with Tm3+, and realizes the 2-micron laser output of the fluoride glass microsphere of the ZYA doped with Tm3+. The laser in the invention has the characteristics of low threshold value and high Q value; and the structure is simple, the miniaturization and integration of the laser can be realized under a low threshold value, and a new matrix material is provided for the laser technology. The 2-micron laser obtained by the invention can be applied to the fields of integrated photonics, low-threshold laser, high-sensitivity biosensing, cavity photodynamics and the like.

Description

technical field [0001] The invention belongs to the field of solid fiber lasers, in particular to a Tm-based 3+ Doped fluoride glass microsphere lasers. Background technique [0002] The microsphere laser is based on the whispering gallery mode Whispering Gallery Modem, that is, the microcavity laser of WGM. WGM has the characteristics of long coherence length, narrow spectral linewidth, low threshold, high conversion efficiency, high-speed modulation, etc. The resonant cross-section of its microcavity is a ring structure, and the total internal reflection cycle of light along the boundary of the ring cross-section continuously forms resonance. There are many shapes of WGM-mode microcavities, including spherical, bottle-shaped, disk-shaped, and ring-shaped. WGM mode microcavities can be fabricated from a variety of materials, including both solid and liquid forms. Due to its simple structure and smooth inner surface, its Q value is extremely high, usually higher than 10 ...

AI Technical Summary

Problems solved by technology

Among the three methods, due to the large thermal field range of the heating source in the first two methods, it is difficult to control the temperature, so it is difficult to add a microsphere cavity with a diameter of less than 200 μm. When the size of the active microsphere cavity is too high, the surface quality is easy to deteriorate , the main source of surface deterioration is crystallization, adhesion, surface cracks, etc.

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