Neodymium ion doped vanadate crystal laser

Abstract

The invention provides a neodymium ion doped vanadate crystal laser. The neodymium ion doped vanadate crystal laser comprises an excitation source, a focusing system, a laser resonant cavity and a laser dielectric crystal. A neodymium ion doped vanadate crystal serves as the laser dielectric crystal; a diode laser emitting a laser with the central wavelength being 808 nm or 880 nm serves as the excitation source; the laser resonant cavity is composed of an input cavity lens and an output cavity lens, and the input cavity lens and the output cavity lens are plated with suitable film structuresto obtain output of a laser at the waveband of 1123-1300 nm; and the laser dielectric crystal is located between the input cavity lens and the output cavity lens, and the excitation source, the focusing system and the laser resonant cavity are sequentially arrayed along a light path. The neodymium ion doped vanadate crystal laser only refers to the laser effect, an emission spectrum is expanded through the electron-phonon coupling effect in the neodymium ion doped vanadate crystal, and the neodymium ion doped vanadate crystal laser has the advantages of being low in laser threshold value, highin conversion efficiency, simple in design and the like.

Description

Technical field [0001] The invention relates to a vanadate crystal laser doped with neodymium ions and belongs to the technical field of lasers. Background technique [0002] Lasers of different wavelengths have different application ranges and requirements, and the wavelength of the laser is determined by the intrinsic energy level of the activated ions in the gain medium. Currently based on rare earth ions (such as Nd 3+ , Yb 3+ Etc.) The radiation of electrons in the intrinsic energy levels has maturely realized 946nm, 912nm, 1064nm, 1340nm, 960nm and other wavelength lasers (Applied Physics B, 70,769, 2000; Applied Physics B, 86, 65, 2007; patents) Document CN101728757A). In the wavelength range of 1100-1300nm, Nd 3+ The intrinsic emission of ions may achieve laser emission with stimulated radiation near 1110nm. For example, the use of neodymium-doped yttrium aluminum garnet crystal (abbreviation: Nd:YAG) stimulated radiation can obtain 1112nm and 1123nm lasers (Opt. Lett 3...

AI Technical Summary

Problems solved by technology

The above-mentioned methods for obtaining lasers with wavelengths of 1176nm and 1170nm are all stimulated Raman scattering techniques, which are a third-order nonlinear optical process, and the electrical polarization of the medium is not linearly related to the incident light intensity, but a third-order power Series relationship, photons participate in the process of forming laser, it is photon-phonon interaction, the required light intensity is larger, the laser threshold is higher, and the laser structure and design are more complicated

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