The influence of temperature and input energy on the fluorescence emission cross section of Nd3＋ ：YAG crystal is studied. The stimulated emission cross sections of quasi-three-level systems are determined in a tempe...The influence of temperature and input energy on the fluorescence emission cross section of Nd3＋ ：YAG crystal is studied. The stimulated emission cross sections of quasi-three-level systems are determined in a temperature range from -30 to 60 ℃ and an input energy range from 18 to 75 J. The cross section is found to be decreased when the temperature and the input energy are increased. This is attributed to the thermal broadening mechanism of the emission line. This study is relevant for the development of laser design.展开更多
The thermal effect on the laser transition at 946nm is investigated.The temperature of the cooling system is verified in the range 2-60℃.A Nd:YAG laser crystal is utilized as a gain medium and is pumped by a newly de...The thermal effect on the laser transition at 946nm is investigated.The temperature of the cooling system is verified in the range 2-60℃.A Nd:YAG laser crystal is utilized as a gain medium and is pumped by a newly developed flashlamp.The variable pumping energy is accomplished within the 5-40 d range.The stimulated emission cross section of the 946-nm line is estimated based on the fluorescence spectrum of the Nd:YAG laser.The stimulated emission cross section of the 946-nm line is found to be inversely proportional to the temperature and to the input energy due to the increase of the thermal population at the ground level.展开更多
基金Project supported by the Higher Education of Malaysia (Grant No. 7126.00H10)the International Development Fund
文摘The influence of temperature and input energy on the fluorescence emission cross section of Nd3＋ ：YAG crystal is studied. The stimulated emission cross sections of quasi-three-level systems are determined in a temperature range from -30 to 60 ℃ and an input energy range from 18 to 75 J. The cross section is found to be decreased when the temperature and the input energy are increased. This is attributed to the thermal broadening mechanism of the emission line. This study is relevant for the development of laser design.
基金Supported by government of Malaysia through MOHE under Grant No 7126.00H10,for Mr Seyed Ebrahim Pourmand to pursue his PhD through IDF program,and RMC.
文摘The thermal effect on the laser transition at 946nm is investigated.The temperature of the cooling system is verified in the range 2-60℃.A Nd:YAG laser crystal is utilized as a gain medium and is pumped by a newly developed flashlamp.The variable pumping energy is accomplished within the 5-40 d range.The stimulated emission cross section of the 946-nm line is estimated based on the fluorescence spectrum of the Nd:YAG laser.The stimulated emission cross section of the 946-nm line is found to be inversely proportional to the temperature and to the input energy due to the increase of the thermal population at the ground level.
