TY - JOUR
T1 - Third harmonic generation in double-pulse laser induced air plasma
AU - Nagli, Lev
AU - Gaft, Michael
AU - Raichlin, Yosef
N1 - Publisher Copyright:
© 2019
PY - 2019/7/15
Y1 - 2019/7/15
N2 - We found a fast hydrodynamic process in air double pulse Laser Induced Plasma (LIP) during the first 50 ns of plasma life. This process leads to strong inhomogeneity in the refractive index of air LIP, disturbance in the Gouy phase shift, and an increase in Third Harmonic Generation (THG). The efficiency of THG strongly depends on the confocal parameter of the focusing beam. The decrease in the focus of the pumping lens, despite the increase in the pump intensity, leads to a decrease in TH intensity. This can be attributed to the change from weak to tight focusing conditions in THG.
AB - We found a fast hydrodynamic process in air double pulse Laser Induced Plasma (LIP) during the first 50 ns of plasma life. This process leads to strong inhomogeneity in the refractive index of air LIP, disturbance in the Gouy phase shift, and an increase in Third Harmonic Generation (THG). The efficiency of THG strongly depends on the confocal parameter of the focusing beam. The decrease in the focus of the pumping lens, despite the increase in the pump intensity, leads to a decrease in TH intensity. This can be attributed to the change from weak to tight focusing conditions in THG.
KW - Air laser breakdown
KW - Laser induced plasma
KW - Third harmonic generation
UR - http://www.scopus.com/inward/record.url?scp=85062913552&partnerID=8YFLogxK
U2 - 10.1016/j.optcom.2019.03.033
DO - 10.1016/j.optcom.2019.03.033
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AN - SCOPUS:85062913552
SN - 0030-4018
VL - 443
SP - 63
EP - 68
JO - Optics Communications
JF - Optics Communications
ER -