Laser taking perovskite quantum dot microcrystalline glass as gain medium

Abstract

The invention provides a laser taking perovskite quantum dot microcrystalline glass as a gain medium. The laser comprises a pump source, a laser gain medium and a resonant cavity. The pump source is apump light source which is shorter than a quantum dot absorption cut-off wavelength and is used to excite the laser gain medium. The laser gain medium is the perovskite quantum dot microcrystalline glass and is used to receive radiation from the pump source and emit photons. The resonant cavity is a periodic structure resonant cavity and is used for amplifying the photon emitted by the laser gainmedium to output continuous lasers or a pulsed laser. A perovskite quantum dot microcrystalline glass material of the laser gain medium is CsPbX3 (X=Cl, Br, I), or CsPb (ClxBr1-x)3, or CsPb (BrxI1-X)3, or CsPb2Br5. Pb ions in the perovskite quantum dot microcrystalline glass material can be completely or partially replaced with tin ions, or bismuth ions, or manganese ions. A luminous wavelength of the perovskite quantum dot microcrystalline glass can be adjusted in a range of 400-800 nm, environmental and mechanical stability is good, and optical transmission losses are low.

Description

Technical field [0001] The present invention relates to the field of laser technology, in particular, to a laser with perovskite quantum dot glass-ceramics as a gain medium. Background technique [0002] Visible light solid-state lasers have a wide range of applications in laser communications, fluorescence excitation, lidar, photoelectric detection, medical instruments, bioengineering, material analysis, laser marking, holography, Raman spectroscopy, laser lighting and other fields. Visible light solid-state lasers include mainly semiconductor electrically pumped lasers and all-solid-state optically pumped nonlinear effect (frequency doubled) lasers. [0003] Semiconductor electrically pumped lasers have complex processes and high costs. Because the wavelength is limited by the band gap of the semiconductor material, the lasing wavelength is narrow or discontinuously adjustable, and the beam quality is not good (polarization leads to poor cross-mode characteristics) . Although s...

AI Technical Summary

Problems solved by technology

[0009] According to the above, problems such as high cost, poor luminous wavelength tunability, low photoelectric conversion efficiency, and unsatisfactory beam quality of the existing technology are proposed in the electric pump laser, and all-solid-state lasers have poor wavelength tunability, low photoelectric conversion efficiency, and poor wavelength stability. problems, as well as technical problems such as poor environmental stability, reliability and mechanical stability of lasers based on nanocrystalline quantum dots and nanowires or thin films mixed with other materials as laser gain media, and large optical transmission losses , and provide a laser with perovskite quantum dot glass-ceramics as the gain medium

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