研究目的
To investigate the temporal profile of ultrafast lasers by using autocorrelation technique and compare various techniques to measure the temporal profile of the ultrafast lasers.
研究成果
The temporal profile of the ultrafast pulsed lasers was investigated for cases with and without a band pass filter in the experimental setup. The measured pulse-width was found to vary for different configurations, which may be due to the different optical components in the path. The autocorrelation technique yields estimation of the pulse width, equivalent to results obtained by other techniques.
研究不足
The measured pulse-width varies for different configurations, which may be due to the different optical components in the path. The autocorrelation technique yields estimation of the pulse width, which is equivalent to the pulse width estimation results obtained by other techniques.
1：Experimental Design and Method Selection:
The study compares various techniques to measure the temporal profile of ultrafast lasers, focusing on the autocorrelation technique.
2：Sample Selection and Data Sources:
The study uses ultrafast pulsed lasers and nonlinear optical materials for second harmonic generation.
3：List of Experimental Equipment and Materials:
Includes beam splitter, optical delay line, mirrors, lenses, nonlinear crystals (BBO and KDP), and a detector interfaced to a computer system.
4：Experimental Procedures and Operational Workflow:
An incoming laser beam is split into two parts, one with a fixed optical path length and the other through an optical delay line, then directed onto a nonlinear crystal for second harmonic generation.
5：Data Analysis Methods:
The autocorrelation trace is analyzed to estimate the pulse width using Gaussian fitting function in origin lab software.
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