Nonlinear Responses and Optical Properties Modification οf SK3 under Irradiation of Femtosecond Laser Pulses

• Authors: K. Jamshidi-Ghaleh , H. Rezapour
• Languages of publication: EN

Abstracts

EN

In this paper, the nonlinear responses and optical properties modification in SK3 glass sample are investigated. The nonlinear responses measurements were performed by using of nonlinear transmission monitoring of 200 fs at 800 nm laser pulses. The optical power limiting threshold of the sample is measured to be about 40 mJ/cm^{2}. The decrease of transmitted intensity is about 63% compared to the theoretical linear transmission at 270 mJ/cm^{2} incident pulse energy. For prediction of the experimental nonlinear behavior results, a theoretical model based on three-photon absorption and absorption of free carriers is presented. By fitting of experimental data with theoretical model, three-photon absorption coefficient and free-carrier absorption cross-section are reported. The photo-induced optical properties modification of the SK3 sample is investigated also. The modifications that appear as darkening are observed below breakdown threshold intensity. To analyses of modified region sizes, the laser pulse energy accumulation model is applied.

Keywords

EN

33.80.Wz; 78.20.Ci

Discipline

• 78.20.Ci: Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
• 33.80.Wz: Other multiphoton processes

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 116
• Issue: 4
• Pages: 588-591

Dates

published

2009-10

Contributors

author

K. Jamshidi-Ghaleh

• Department of Physics, Azarbaijan University of Tarbiat Moallem, Tabriz, Iran

author

H. Rezapour

• Department of Physics, Azarbaijan University of Tarbiat Moallem, Tabriz, Iran

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Identifiers

DOI

10.12693/APhysPolA.116.588