LU Dazhi (1990-), male, Ph.D., Associate Researcher. E-mail: dazhi.lu@sdu.edu.cn
Yb:YCa4O(BO3)3 (Yb:YCOB) self-frequency doubling (SFD) crystals with different doping concentrations (5%-30%, mole fraction, the same below) were grown by the Czochralski method, and the relationship between the structure and doping concentration of the as-grown crystals was analyzed. The crystals were cut along the direction with a maximum effective nonlinear coefficient, and the microchip structure design was realized. The yellow laser output with a maximum power of 1.71 W can be obtained in Yb:YCOB crystal with a doping concentration of 30% and a crystal length of 4 mm with respect to the electric-phonon coupling effect. The conversion efficiency is 11.97% and the output wavelength is stabilized at 570 nm based on the proper coating parameter design. The results show that Yb:YCOB SFD crystals can realize the practical yellow laser.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |