Open AccessFrequency shift of laser pulse propagating in wakefield
Author(s) -
Han Xu,
Chang Wen-Wei,
Yuan Yan
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.171
Subject(s) - pulse (music) , laser , physics , ultrashort pulse , group velocity , plasma , optics , multiphoton intrapulse interference phase scan , atomic physics , bandwidth limited pulse , quantum mechanics , detector
When two ultrashort and ultrahigh laser pulses spacing an appropriate distance propagate through tenuous plasma, the second laser pulse will be compressed and shift to higher frequency because the anterior part of the pulse experiences the higher plasma density and propagates with lower group velocity while the rear part of the pulse experiences the lower plasma density and propagates with higher group velocity. The frequency shift of the second pulse in our PIC simulation is in good agreement with the theoretical predication. Furthermore, the optimum intervals between the two pulses is larger than that estimated with linear theory.