TEMPORAL CHARACTERIZATION OF LASER PULSES FROM JIGUANG-I LASER FACILITY WITH A COMPACT DUAL FUNCTION AUTOCORRELATOR |
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Authors: | Xia Jiang-fan Wei Zhi-yi Qiu Yang Lü Tie-zheng Teng Hao Wang Zhao-hua Zhang Jie |
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Affiliation: | Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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Abstract: | An optical pulse autocorrelator for rapid and slow scanning is described in this paper. Using an audio loudspeaker on one arm, an interferometric rapid-scanning signal of the output from a high-repetition laser oscillator is obtained. However, by adjusting the positions of the mirrors and using a step-motor on another arm, the intensity autocorrelation function of the output from a low-repetition laser amplifier can be easily measured. Using all-reflecting optics and an adequate nonlinear crystal, the whole instrument is very compact and has been used to measure sub-20 fs light pulses in both configurations with excellent agreement. In the slow-scanning configuration, a pulse train as long as 500ps has been determined. Using this autocorrelator, the home-made JIGUANG-I CPA laser facility was characterized for its pulse duration evolution. |
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Keywords: | interferometric autocorrelation intensity autocorrelation femtosecond laser pulses |
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