TY - JOUR
T1 - Spectral evolution of angularly resolved third-order harmonic generation by infrared femtosecond laser-pulse filamentation in air
AU - Xiong, Hui
AU - Xu, Han
AU - Fu, Yuxi
AU - Cheng, Ya
AU - Xu, Zhizhan
AU - Chin, See Leang
PY - 2008/4/1
Y1 - 2008/4/1
N2 - We experimentally investigate the evolution of an angularly resolved spectrum of third harmonic generated by infrared femtosecond laser pulse filamentation in air. We show that at low pump intensity, phase matching between the fundamental and third-harmonic waves dominates the nonlinear optical effect and induces a ring structure of the third-harmonic beam, whereas at high pump intensity, the dispersion properties of air begin to affect the angular spectrum, leading to the formation of a nonlinear X wave at third harmonic.
AB - We experimentally investigate the evolution of an angularly resolved spectrum of third harmonic generated by infrared femtosecond laser pulse filamentation in air. We show that at low pump intensity, phase matching between the fundamental and third-harmonic waves dominates the nonlinear optical effect and induces a ring structure of the third-harmonic beam, whereas at high pump intensity, the dispersion properties of air begin to affect the angular spectrum, leading to the formation of a nonlinear X wave at third harmonic.
UR - https://www.scopus.com/pages/publications/41549138775
U2 - 10.1103/PhysRevA.77.043802
DO - 10.1103/PhysRevA.77.043802
M3 - 文章
AN - SCOPUS:41549138775
SN - 1050-2947
VL - 77
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 4
M1 - 043802
ER -