强激光与粒子束2012，Vol.24Issue(6)：1369-1375,7.DOI:10.3788/HPLPB20122406.1369
光纤放大器对短脉冲串动态响应的半解析
Semi-analytical investigation on dynamic response of fiber amplifier to short-pulse train
摘要
Abstract
For a high power short-pulse train with a period of microsecond level, and a pulse width of nanosecond level, the amplification process of the pulse train by a fiber amplifier in one period is approximately divided into a pumping stage and an amplification stage, considering the periodic behavior of the pulse train, and neglecting the loss coefficient and spontaneous emission. By using the end-pumped dynamic rate equations, the semi-analytical relation related to the average value of upper-level population in the two stages, has been established. Then the impact of fiber length on the gain is simulated, and the periodic variation of average value of the upper-level population is discussed. Pulse deformation of the train due to the depletion of gain by the pulse front is quantitatively analyzed. The results show that the gain of the pulse front can be about 29. 22 dB, while that of the pulse trail is low to 0. 82 dB. Thus the deformation of the pulse trail is bound to exist.关键词
光纤放大器/速率方程组/半解析/短脉冲串/动态响应Key words
fiber amplifier/ rate equations/semi-analytical analysis/train of short optical pulses/ dynamic response分类
信息技术与安全科学引用本文复制引用
段志春,周继芳,陈建国,王藩侯,高曾辉,黄永平,陈海涛..光纤放大器对短脉冲串动态响应的半解析[J].强激光与粒子束,2012,24(6):1369-1375,7.基金项目
国家自然科学基金项目(60890203) （60890203）
四川省教育厅项目基金项目(10ZA063,10ZC031,10ZC032) （10ZA063,10ZC031,10ZC032）
宜宾学院博士基金项目(2010B14) （2010B14）
