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Talbot effect of a grating under ultrashort pulsed‐laser illumination
Author(s) -
Wang Huaisheng,
Zhou Changhe,
Jianlang Li,
Liu Liren
Publication year - 2000
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(20000505)25:3<184::aid-mop8>3.0.co;2-9
Subject(s) - talbot effect , optics , grating , physics , laser , fresnel diffraction , pulse (music) , ultrashort pulse , femtosecond pulse shaping , femtosecond , microwave , multiphoton intrapulse interference phase scan , diffraction , fresnel number , materials science , detector , quantum mechanics
The Talbot effect of a grating under ultrashort short‐pulsed light illumination is analyzed from its Fresnel diffraction equation. We find that the Talbot self‐imaging effect gradually diminishes when the full width Δτ at half maximum of the incident ultrashort laser pulse decreases. If Δτ is within a few tens of femtoseconds, the self‐imaging effect disappears. We note that the maximal value of the sharp peak of the intensity distribution at the first Talbot distance increases steadily along with the increase of Δτ. Therefore, by using this phenomenon, the width of an ultrashort laser pulse can be measured roughly. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 25: 184–187, 2000.