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Characterization of ultrashort optical pulses with third-harmonic-generation based triple autocorrelation

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7 Author(s)
Liu, Tzu-Ming ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Huang, Yin-Chieh ; Chern, Gia-Wei ; Lin, Kung-Hsuan
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We 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.

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Quantum Electronics, IEEE Journal of  (Volume:38 ,  Issue: 11 )