文献类型：期刊文献

英文题名：Enhanced optical precursors by Doppler effect via active Raman gain process

作者：Peng, Yandong[2];Niu, Yueping[1];Zhang, Lida[3];Yang, Aihong[2];Jiang, Lin[2];Gong, Shangqing[1]

机构：[1]E China Univ Sci & Technol, Dept Phys, Sch Sci, Shanghai 200237, Peoples R China;[2]Shandong Univ Sci & Technol, Coll Sci, Dept Appl Phys, Qingdao 266590, Shandong, Peoples R China;[3]Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

年份：2012

卷号：37

期号：16

起止页码：3333

外文期刊名：OPTICS LETTERS

收录：;EI(收录号：20123615394906);WOS:【SCI-EXPANDED(收录号:WOS:000307956700014)】；

基金：This work is supported by the Shandong Natural Science Foundation (No. ZR2012FQ001) and the National Natural Science Foundation of China (No. 60978013). Author Y. P. Niu acknowledges the support of Shanghai Rising-Star Program (No. 11QA1407400).

语种：英文

外文关键词：Dispersions

摘要：A scheme for enhancing precursor pulse by Doppler effect is proposed in a room-temperature active-Raman-gain medium. Due to abnormal dispersion between two gain peaks, main fields are advanced and constructively interfere with optical precursors, which leads to enhancement of the transient pulse at the rise edge of the input. Moreover, after Doppler averaging, the abnormal dispersion intensifies and the constructive interference between precursors and main fields is much strengthened, which boosts the transient spike. Simulation results demonstrate that the peak intensity of precursors could be enhanced nearly 20 times larger than that of the input. (C) 2012 Optical Society of America