Liu, Tzu-MingTzu-MingLiuHuang, Yin-ChiehYin-ChiehHuangChern, Gia-WeiGia-WeiChernLin, Kung-HsuanKung-HsuanLinHung, Yu-ChuehYu-ChuehHungLee, Chih-JieChih-JieLeeSun, Chi-KuangChi-KuangSun2009-03-252018-07-062009-03-252018-07-062002http://ntur.lib.ntu.edu.tw//handle/246246/148304http://ntur.lib.ntu.edu.tw/bitstream/246246/148304/1/39.pdfWe present a method to obtain complete information of femtosecond pulses. By measuring triple-optical autocorrelation directly with third-harmonic generation, without spectral information, a temporal pulse shape can be obtained by analytical calculation without direction-of-time ambiguity. Combining the resulting optical pulse shape with its corresponding optical spectrum, the exact phase and color variations in time can all be recovered with a Gerchberg-Saxton algorithm through an iterative calculation with an O(n) complexity.application/pdf283050 bytesapplication/pdfen-USjournal article10.1109/JQE.2002.804268http://ntur.lib.ntu.edu.tw/bitstream/246246/148304/1/39.pdf