Laser performance of 1064 nm domestic Nd：YAG ceramic lasers for 885 nm direct pumping and 808 nm traditional pumping are compared. Higher slope efficiency of 34% and maximum output power of 16.5 W are obtained for th...Laser performance of 1064 nm domestic Nd：YAG ceramic lasers for 885 nm direct pumping and 808 nm traditional pumping are compared. Higher slope efficiency of 34% and maximum output power of 16.5 W are obtained for the 885nm pump with a 6ram length 1 at.% Nd：YAG ceramic. The advantages for 885nm direct pumping are discussed in detail. This pumping scheme for highly doping a Nd：YAG ceramic laser is considered as an available way to generate high power and good beam quality simultaneously.展开更多
Tourmaline is an important functional and gem material. The current study examines pink, green, and brownish-green tourmalines from Altay deposit. Based on X-ray fluorescence （XRF） quantitative analyses and ultrario...Tourmaline is an important functional and gem material. The current study examines pink, green, and brownish-green tourmalines from Altay deposit. Based on X-ray fluorescence （XRF） quantitative analyses and ultrariolet-visible-near-infrared （UV-VIS NIR） spectral analyses in combination with annealing ex- periments, the color center of tourmaline is found to be related to the d - d transitions of ions or the d - d transitions of exchange coupled ions. Annealing crystMs treatment affects the color improvement of tourmaline展开更多
基金Supported by the Key Project of the National Natural Science Foundation of China under Grant No 50590404.
文摘Laser performance of 1064 nm domestic Nd：YAG ceramic lasers for 885 nm direct pumping and 808 nm traditional pumping are compared. Higher slope efficiency of 34% and maximum output power of 16.5 W are obtained for the 885nm pump with a 6ram length 1 at.% Nd：YAG ceramic. The advantages for 885nm direct pumping are discussed in detail. This pumping scheme for highly doping a Nd：YAG ceramic laser is considered as an available way to generate high power and good beam quality simultaneously.
文摘Tourmaline is an important functional and gem material. The current study examines pink, green, and brownish-green tourmalines from Altay deposit. Based on X-ray fluorescence （XRF） quantitative analyses and ultrariolet-visible-near-infrared （UV-VIS NIR） spectral analyses in combination with annealing ex- periments, the color center of tourmaline is found to be related to the d - d transitions of ions or the d - d transitions of exchange coupled ions. Annealing crystMs treatment affects the color improvement of tourmaline
