Chirp characteristics of modified spectrum autointerferometric correlation for femtosecond pulse
-
摘要: 为了测量飞秒激光脉冲啁啾,采用了一种对干涉自相关光谱作频谱修正的简单方法,得到干涉自相关修正光谱.利用该修正光谱对啁啾有很高灵敏度的特性,对高斯型强度分布的线性啁啾、平方啁啾脉冲进行了理论分析和实验验证,取得了修正光谱的下包络峰的高度与啁啾量对应关系、下包络峰的个数与啁啾次数对应关系.结果表明,根据干涉自相关修正光谱下包络的峰值,可估定啁啾的量值,根据干涉自相关修正光谱下包络峰的个数可以判断脉冲啁啾的次数.这一结果对精确地测量飞秒激光脉冲的微小啁啾量是有帮助的.Abstract: A simple method which can measure the chirp of femtosecond laser pulses was described.Modified spectrum autointerferometric correlation(MOSAIC) uses spectral filtering of the interferometric autocorrelation(IAC) to render a waveform that is highly sensitive to chirp.The Gaussian intensity of femto-second chirped pulses was numerically calculated.The peak of the MOSAIC minima envelope as a function of the normalized mean chirp for different orders of chirp and MOSAIC peak number corresponding to the first-and second-order chirps were obtained.Low chirp of femto-second laser pulses can be determined accurately with the MOSAIC.
-
-
[1] LEMOFF B E,BARTY C P J.Quintic-phase-limited,spatially uniform expansion and recompression of ultrashort optical pulses[J].Opt Lett,1993,18(19):1651～1653.
[2] JUNG I D,KARTNER F X,MATUSCHEK N et al.Self-starting 6.5fs from a KLM Ti:sapphire laser[J].Opt Lett,1997,22(13):1009～1011.
[3] MANSOOR S B.Femtosecond Kerr-lens autocorrelation[J].Opt Lett,1997,22(6):399～401.
[4] TOSHIYUKI H,MANSOOR S B.Real-time chirp diagnostis for ultrashort laser pulses[J].Opt Lett,2002,27(10):860～862.
[5] DANIEL A B,MICHAEL P H,MANSOOR S B.Sensitive ultrashort pulse chirp measurement[J].Opt Lett,2006,31(1):122～4124.
[6] OUYANG Zh,PENG W J,LI Q X et al.An IBM PC/XT computer controlled autocorrelator and datum acquisition processing system[J].Laser Technology,1994,18(5):313～316(in Chinese).
[7] LIU T F,HU G L.Study of the time standards and calibrating methods of ultrashort laser pulses detection[J].SPIE,2002,4231:608～612.
[8] LIU T F,SHE W L,QIU Zh R et al.Calibration method for the measurement of ultrashort pulsed lasers[J].Chinese Journal of Lasers,2004,31(1):111～114(in Chinese).
[9] CHEN B F,LIU T F.Numerical simulation of femtosecond pulses measurement with SPIDER[J].Laser Technology,2006,30(1):13～15(in Chinese).
计量
- 文章访问数: 0
- HTML全文浏览量: 0
- PDF下载量: 7
下载: