Color-center generation in silicate glasses exposed to infrared femtosecond pulses

Efimov, Oleg M.; Gäbel, K.; Garnov, S. V.; Glebov, Leonid; Grantham, Steve E.; Richardson, Martin; Soileau, M. J.

doi:10.1364/josab.15.000193

Cited by 100 publications

(38 citation statements)

References 20 publications

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“…Theoretical modelNowadays, it is accepted(Said et al 1992;Smektala et al 2002;Bhawalkar et al 1996;Lonzaga et al 2003;Efimov et al 1998) that the multi-photon absorption phenomenon…”

mentioning

confidence: 99%

Modeling of nonlinear responses in BK7 glass under irradiation of femtosecond laser pulses

Jamshidi‐Ghaleh

Masalehdan

2009

Opt Quant Electron

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In this paper, the nonlinear response in BK7 glass sample is investigated under irradiation of 200 fs laser pulses at 800 nm wavelength by using of transmission measurement method. Nonlinear transmission is observed for incident pulse energies above 37 µJ. A theoretical model based on simultaneously absorption of one, two and three-photon absorption is presented. The contribution of free-carriers absorption is also included on the model. The differential equation is solved analytically. The experimental results and predictions of theoretical model are in good agreement. The values of three-photon absorption coefficient and free-carriers absorption cross-section are reported.

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“…Theoretical modelNowadays, it is accepted(Said et al 1992;Smektala et al 2002;Bhawalkar et al 1996;Lonzaga et al 2003;Efimov et al 1998) that the multi-photon absorption phenomenon…”

mentioning

confidence: 99%

Modeling of nonlinear responses in BK7 glass under irradiation of femtosecond laser pulses

Jamshidi‐Ghaleh

Masalehdan

2009

Opt Quant Electron

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“…In that case, using different techniques, we demonstrated the absence of multiphoton absorption and electron excitation in the volumes of silicate glasses like BK7 under IR radiation, even for long nanosecond pulses. Nevertheless, under femtosecond pulses a different mechanism might be responsible for the electron generation [24]. The later research showed that in this case the ionization of the glass resulted from a two-step nonlinear process: first, a spectral broadening of the transmitting laser radiation and second, linear or two-photon absorption of the short wavelength part of this broadened supercontinuum.…”

Section: A Multiple Pulse Lid In Silicate Glassesmentioning

confidence: 96%

Intrinsic single- and multiple-pulse laser-induced damage in silicate glasses in the femtosecond-to-nanosecond region

2004

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We show that the threshold power density of the intrinsic laser-induced damage in borosilicate glass at ϳ1 m wavelength does not depend on pulse duration from 2 ϫ 10 −13 to 3 ϫ 10 −8 s and has the same value for both single-and multiple-pulse exposure of the sample. This indicates that the mechanism of the intrinsic damage in glasses involves a collective response of a certain volume in the dielectric as a whole, such as "dielectric-metal" phase transition, rather than a process of individual generation and accumulation of electrons, such as multiphoton, tunneling, or avalanche. Also, we demonstrate that under femtosecond exposure the threshold of the plasma formation in transparent glasses is considerably higher than the threshold of the residual change of medium parameters.

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“…This method relies on the use of nonlinear multi-photon absorption for coupling the laser energy into a transparent material and has allowed the photowriting of three-dimensional microstructures inside bulk glass [6][7][8][9][10][11][12]. In spite of laser induced permanent changes, at intensities well below glass dam- * corresponding author; e-mail: k-jamshidi@azaruniv.edu age threshold, another type of modification so called color centers or darkening induces inside glass [13,14]. Color centers form in glass when electrons are ionized to above the glass mobility threshold.…”

Section: Introductionmentioning

confidence: 99%

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

Jamshidi‐Ghaleh

Rezapour

2009

Acta Phys. Pol. A

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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.

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Color-center generation in silicate glasses exposed to infrared femtosecond pulses

Cited by 100 publications

References 20 publications

Modeling of nonlinear responses in BK7 glass under irradiation of femtosecond laser pulses

Modeling of nonlinear responses in BK7 glass under irradiation of femtosecond laser pulses

Intrinsic single- and multiple-pulse laser-induced damage in silicate glasses in the femtosecond-to-nanosecond region

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

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