Research On Fabrication And Characteristics Of The Yb-Doped Laser Materials

The laser glass, the field of laser technology has been widely used to promote a laser device of its rapid and effective development and become a high-energy and high-power lasers the main laser materials. With the birth of photonic crystal fiber, people began to contemplate the use of the excellent characteristics of photonic crystal fiber surplus high-power fiber laser research ,but traditional chemical vapor deposition (CVD, with this method, gaseous chemical substances in the reaction of solid surface solid precipitates, as a condensation reaction remains in the substrate and the structure of the state long-range disorder) on the fabrication of doped photonic crystal fiber also has a number of unavoidable shortcomings. In this paper, a non-chemical vapor deposition method of laser glass doped with Ytterbium and Ytterbium-doped photonic crystal fiber, and its spectral characteristics were analyzed. The main contents include as follows:First,it introduces the rare-earth-doped laser glass and rare-earth-doped photonic crystal fiber laser research status of the rare-earth-doped laser glass and then the theoretical basis discussed in detail.And then, study of rare-earth-doped laser glass design and fabrication of formulations. In the design formulation, selection of equipment, based on the use of high-temperature melting crucible fabricated by the different components of Yb-doped laser glass samples. In order to meet the requirements of the fiber lasers, but also out of the fabricated many samples were differential thermal analysis, refractive index, density, absorption spectra and photoluminescence spectra of a series of performancetestings.At last, based on the experiment results of the six samples, the absorption cross-sectionσabs, the stimulated emission cross-sectionσp, the flurescence lifetimeτf, the least particles countβmin, the saturation pump intensity Isat and the least pump intensity Imin of the samples are calculated. The stimulated emission cross-sections calculated by the Fuchbauer-Ladenburger method and the Reciprocity Method (R-M) are matched. The one with the best laser performance is chosen to be the core of the Yb3+-doped photonic crystal fiber, then fabricate to the Ytterbium-doped PCF.