Title :
Study of Negative Lensing Effect in Transparent Molecular Liquids by Femtosecond Laser Pulses
Author :
Tang, Jaw-Luen ; Chen, Chen-Wei ; Lee, Yi-Ci ; Wei, Tai-Huei ; Chiu, Chia-Ing ; Wang, Jian-Neng ; Huang, Tzer-Hsiang
Author_Institution :
Dept. of Phys., Nat. Chung Cheng Univ., Chiayi
Abstract :
A negative lensing effect is observed in transparent liquids C2H4Cl2 and C2H4Br2 using the Z-scan technique and 28 femtosecond titanium: sapphire laser pulses. Two possible mechanisms, Raman induced Kerr effect and thermal lensing effect, are invoked to account for the sign change of nonlinear refraction.
Keywords :
high-speed optical techniques; laser beams; optical Kerr effect; organic compounds; refractive index; sapphire; solid lasers; thermal lensing; titanium; Al2O3:Ti; Raman induced Kerr effect; Z-scan technique; femtosecond laser pulses; negative lensing effect; nonlinear refraction; thermal lensing effect; time 28 fs; transparent molecular liquid analysis; Apertures; Fluctuations; Laser theory; Laser transitions; Liquids; Optical pulses; Optical refraction; Pulse measurements; Space vector pulse width modulation; Ultrafast optics; Z-scan technique; femtosecond laser pulses; nonlinear refraction;
Conference_Titel :
PhotonicsGlobal@Singapore, 2008. IPGC 2008. IEEE
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-3901-0
Electronic_ISBN :
978-1-4244-2906-6
DOI :
10.1109/IPGC.2008.4781511
