Research On Yb,Ho Co-doped Vanadate Solid-State Laser

2?m laser more and more attracted domestic and foreign researchers' attention, because it is widely used in medicine, optoelectronic countermeasures, laser radar, optical detection and spectroscopy, etc. In recent years, in a variety of ways to achieve 2?m laser, the research interest is using semiconductor laser pumped rare-earth ions doped or co-doped crystal, and it is one of the most effective ways to achieve this band light source. In the thesis, the study of Yb,Ho:LuVO₄ solid-state laser is from both theoretical and experimental aspects.In theory, the thesis analyzes the operating characteristics of the Yb,Ho:LuVO₄ crystal in theory, from its spectral absorption characteristics, and level transition mechanism of energy transfer principle, etc. In the thesis, the level transition mechanism of Yb,Ho co-doped and Tm,Ho co-doped laser material is compared. Then designing the resonator with reasonable parameters and running stably bases on solid-state laser resonator theory. If the pump laser is coupled directly to Yb,Ho:LuV04 laser crystal, the coupling effect will be very poor, because it has some divergence angles. Therefore, this thesis combines existing knowledge designs reasonable telescope coupling system to process the pump laser.In the experiment, this paper selects the optical device and components according to the experiment requirement, the optical device and components are used to build the experiment platform, and the single-end pump and double-end pump of Yb,Ho:LuVO₄ crystal are studied. The experiment shows that the wave length of the output laser is 2076 nm. During the experiment, the effect of resonant resonator parameters and pumping source parameters to the laser output characteristics are also be studied. The best parameters of single-end pump and and double-end pump can be obtained by changing the parameters of resonant resonator and pumping source and analyzing the output characteristics with different laser parameters. Finally, in order to evaluate the beam quality of the Yb,Ho:LuVO₄ laser, this thesis uses the beam quality factor M2 as the evaluation standard. Under the condition of best pump parameters, the beam quality analyzer is used to measure the laser beam quality factor M2 generated by Yb,Ho:LuVO₄ in single-end pump and double-end pump separately.