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- W3118980596 abstract "The phase-matching bandwidth of nonlinear crystal is of great significance in ultrashort laser pulse characterization. In order to satisfy the phase-matching bandwidth, ultra-thin nonlinear crystals are generally required. However, the significantly reduced conversion efficiency, as well as the machining difficulties, limits its applications. Here, we show that sufficient spectrum bandwidth response can be achieved for a thick crystal when the phase-matching wavelength is tuned outside of the spectral window of the measured pulse. By applying this phenomenon to a single-shot second-harmonic generation frequency resolved optical gating (SHG-FROG) device, we successfully characterized a few-cycle pulse using a <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mn>150</mml:mn> <mml:mspace width=thinmathspace /> <mml:mspace width=thinmathspace /> <mml:mtext>µ<!-- µ --></mml:mtext> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi mathvariant=normal>m</mml:mi> </mml:mrow> </mml:math> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mi>β<!-- β --></mml:mi> </mml:math> -barium borate (BBO) crystal. The accuracy of the method was verified by comparing the conventional pulse retrieving approach with a <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mn>5</mml:mn> <mml:mspace width=thinmathspace /> <mml:mspace width=thinmathspace /> <mml:mtext>µ<!-- µ --></mml:mtext> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi mathvariant=normal>m</mml:mi> </mml:mrow> </mml:math> BBO crystal, which has a sufficient phase-matching bandwidth." @default.
- W3118980596 created "2021-01-18" @default.
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- W3118980596 date "2021-01-22" @default.
- W3118980596 modified "2023-10-16" @default.
- W3118980596 title "Few-cycle optical pulse characterization under phase-mismatching" @default.
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- W3118980596 doi "https://doi.org/10.1364/ol.417098" @default.
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