摘要
We report an efficient pumping scheme which involves a direct excitation of the upper lasing level of a four-level laser in a Nd-doped Caa （NbGa）2-x Ga3O12 （Nd：CNGG） by using a tunable Ti：sapphire, 700-920nm, cw pump source. The slope efficiency is improved from 10.5% of the traditional band pumping at 808nm to 21.8% of the direct pumping at 882nm. The influence of pumping wavelength on lasing is discussed. We present a scheme of double pumping for lasing.
We report an efficient pumping scheme which involves a direct excitation of the upper lasing level of a four-level laser in a Nd-doped Caa （NbGa）2-x Ga3O12 （Nd：CNGG） by using a tunable Ti：sapphire, 700-920nm, cw pump source. The slope efficiency is improved from 10.5% of the traditional band pumping at 808nm to 21.8% of the direct pumping at 882nm. The influence of pumping wavelength on lasing is discussed. We present a scheme of double pumping for lasing.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 60438020 and 50672050, and the National Basic Research Programme of China under Grant No 2004CB619002.
