‧ 專利名稱	用來量測超短光脈衝時域強度與項為分布的三重相關器
‧ 專利證書號	US6,734,976B2
‧ 專利權人	國立臺灣大學
‧ 專利國家     (申請日)	美國 (2002/03/14)
‧ 單位	光電工程學研究所
‧ 發明人 / PI	孫啟光,劉子銘,黃英傑,陳嘉維,
‧ 簡歷 / Experience

A method for measuring an ultrashort optical pulse, in which third order autocorrelation of femtosecond (10−15 second) optical pulses was realized based on third-harmonic-generation (THG). A THG signal with three fundamental frequency photon contributed from three different split pulses of the ultrashort optical pulse is first generated. The three split pulses have time delays τ1 and τ2 in between. Then, the intensity of the THG signal is detected while varying the time delays τ1 and τ2 between the split pulses to obtain a triple correlation of the ultrashort optical pulse. The triple correlation and its Fourier transform are used to obtain the magnitude |Ĩ(ν)| and the phase α(ν) of the ultrashort optical pulse intensity in the frequency domain, and the intensity of the ultrashort optical pulse in the time domain I(t) is determined using the magnitude |Ĩ(ν)| and the phase α(ν) by inverse Fourier Transform.

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