Self-frequency-doubling all-solid-state laser based on quasi-two-energy-level laser radiation

Abstract

The invention relates to a self-frequency-doubling all-solid-state laser based on quasi-two-energy-level laser radiation. The laser comprises a pumping source, a focusing system, a laser resonant cavity and a self-frequency-doubling crystal. Pump light emitted by the pump source is collimated and focused by the focusing system and then injected into the self-frequency-doubling crystal through theinput cavity mirror, quasi-second-level radiation in the self-frequency-doubling crystal is achieved through the resonant cavity design, fundamental frequency laser is achieved, and then laser self-frequency-doubling laser emission is achieved through the second-order nonlinear effect of the self-frequency-doubling crystal. The self-frequency-doubling crystal is doped with ytterbium ions, and thewavelength of emitted laser self-frequency-doubling laser is adjustable within 505-520 nm. Quantum loss is reduced by realizing quasi-two-energy-level laser output, the coupling efficiency of the laser process and the frequency doubling process is optimized, and the quasi-two-energy-level laser has the advantages of being high in output power, simple in structure, low in cost, high in temperatureand mechanical stability, beneficial to industrialization and the like.

Description

technical field [0001] The invention relates to a self-frequency doubling all-solid-state laser based on quasi-two-level laser radiation, and belongs to the field of laser technology. Background technique [0002] The laser self-frequency doubling crystal is based on a functional crystal that has both laser and frequency doubling functions and can be effectively combined in one crystal to achieve the laser self-frequency doubling effect through the laser and frequency doubling functions. The prepared laser meets the requirements of "functionalization", "compositeization" and "integration of materials and devices" for optoelectronic functional crystals and devices in today's society, and has received extensive attention. The prepared all-solid-state laser is stable, small and low The characteristics of cost have obtained important applications in various fields such as medical treatment, military affairs, entertainment, and scientific research. The efficiency of self-frequen...

AI Technical Summary

Problems solved by technology

Compared with neodymium ions, the energy level structure of ytterbium ions that contribute to the laser is simpler, only 2 f 5 / 2 and 2 f 7 / 2 Two energy levels, but the energy level structure of the ion is easily affected by the lattice environment (mainly phonons). Under the action of electron-phonon coupling, the energy level of ytterbium ion can be split. Based on this In general, the laser radiation achieved by using the split three-level or quasi-four-level energy can reduce the laser threshold and increase the intrinsic quantum deficit, and its reabsorption and photon-phonon coupling will change the ion's The spectral output characteristics lead to changes in the laser output wavelength, that is, the wavelength of the fundamental frequency light, which in turn affects the output efficiency of self-frequency multiplication

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