Nonlinear refraction and absorption measurements with chirped femtosecond laser pulses: experiments and simulations
JOSA B, Vol. 16, Issue 4, pp. 651-661 (1999)
http://dx.doi.org/10.1364/JOSAB.16.000651
Acrobat PDF (395 KB)
Abstract
We report an extension of the spectrally resolved two-beam coupling technique to measure the nonlinear intensity index of refraction (n2I) and the two-photon absorption coefficient (β) by use of chirped laser pulses. The linear chirp parameter b is incorporated into the derivation of a more general model than the previous one [Opt. Lett. 22, 1077 (1997)]. We have also analyzed the validity of this linear chirp model through a comparison of the experimental results for fused silica with the numerically accurate calculation that considers higher-order chirps obtained by second-harmonic generation frequency-resolved optical gating. The results show that this method potentially can be used to extract the chirp. Finally, we applied this transient spectrally resolved nonlinear transmittance spectroscopy to semiconductor-doped glasses to extract their n2I and β.
© 1999 Optical Society of America
[Optical Society of America ]
OCIS Codes
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.1590) Ultrafast optics : Chirping
(320.7100) Ultrafast optics : Ultrafast measurements
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
Citation
J.-K. Wang, T.-L. Chiu, C.-H. Chi, and C.-K. Sun, "Nonlinear refraction and absorption measurements with chirped femtosecond laser pulses: experiments and simulations," J. Opt. Soc. Am. B 16, 651-661 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-4-651
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