Influence of Initial Pulse Chirp on Rainbow-Like Supercontinuum Generation from Filamentation in Air

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2008,（4）
• 页码范围: 1365-1367
• 页数: 3页
• 语种: 英文

摘要

Supercontinuum (SC) generation from laser filamentation in air is found to depend strongly on the pulse duration.Rainbow-like SC generation is observed only for a pulse of appropriate negative chirp that agrees with the predictions put forward by Golubtsov et al. [Quantum Electron. 33 (2003) 525]. The conversion efficiency of an 800-nm laser light to rainbow-like SC is found to be the highest for 257fs pulses with an initial negative chirp.A larger chirp will lead to ffiamentation surviving at longer distance.