Impact of two-photon absorption and free-carrier effects on time lens based on four-wave mixing in silicon waveguides

We investigate the influences of two-photon absorption (TPA) and free-carrier effects on a time lens via four-wave mixing in silicon waveguides. It is found that the output waveform is severely modulated and the conversion efficiency is sharply reduced in temporal imaging owing to the impacts of the...

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Bibliographic Details
Published inApplied physics express Vol. 11; no. 8; pp. 82204 - 82207
Main Authors Xie, Peng, Sun, Qibing, Wang, Leiran, Wen, Yu, Wang, Xinyu, Wang, Guoxi, Zeng, Chao, Liu, Mulong, Ge, Zhiqiang, Lu, Zhizhou
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.08.2018
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Summary:We investigate the influences of two-photon absorption (TPA) and free-carrier effects on a time lens via four-wave mixing in silicon waveguides. It is found that the output waveform is severely modulated and the conversion efficiency is sharply reduced in temporal imaging owing to the impacts of the nonlinear absorption. A silicon-organic hybrid slot waveguide with negligible TPA is proposed for the time lens, which could realize 600× magnification of femtosecond pulses. These results can increase the signal bandwidth from gigahertz to terahertz and give rise to important potential applications for ultrafast optical signal processing in integrated optics, ultrafast optics, and optical communications.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.11.082204