Dependence of the femtosecond laser refractive index change thresholds on the chemical composition of doped-silica glasses

Lancry, Matthieu; Poumellec, Bertrand; Chahid-Erraji, A.; Beresna, Martynas; Kazansky, Peter G.

doi:10.1364/ome.1.000711

Cited by 79 publications

(55 citation statements)

References 47 publications

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“…This result was in a good agreement with several experimental observations [16,17]. However, the influence of the concentration of inhomogeneities on the evolution of nanogratings, to our knowledge, has not been investigated previously, leaving unexplained the results of several experiments [15,[59][60][61].…”

Section: Introductionsupporting

confidence: 92%

“…Additionally, impurities that were embedded in bulk fused silica also contributed to nanograting formation. They also enhanced and improved the nanoplasma incubation process [15,[59][60][61]. In previous studies, the dynamics of laser interaction with inhomogeneities of different nature was studied for voids [48], for nanospheres of densified fused silica [41], and for metallic nanoparticles [62].…”

Section: Introductionmentioning

confidence: 99%

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From random inhomogeneities to periodic nanostructures induced in bulk silica by ultrashort laser

2016

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Femtosecond laser-induced volume nanograting formation is numerically investigated. The developed model solves nonlinear Maxwell's equations coupled with multiple rate free carrier density equations in the presence of randomly distributed inhomogeneities in fused silica. As a result of the performed calculations, conduction band electron density is shown to form nanoplanes elongated perpendicular to the laser polarization. Two types of nanoplanes are identified. The structures of the first type have a characteristic period of the laser wavelength in glass and are attributed to the interference of the incident and the inhomogeneity-scattered light waves. Field components induced by coherent multiple scattering in directions perpendicular to the laser polarization are shown to be responsible for the formation of the second type of structures with a subwavelength periodicity. In this case, the influence of the inhomogeneity concentration on the period of nanoplanes is shown. The calculation results not only help to identify the physical origin of the self-organized nanogratings, but also explain their period and orientation.

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Section: Introductionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

From random inhomogeneities to periodic nanostructures induced in bulk silica by ultrashort laser

2016

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“…15 Furthermore, doping of pure silica glass with Ge, F, and P was demonstrated to affect the threshold for nanograting formation. 16 Recently, evidence for femtosecond laser-induced nanogratings has been observed in glasses other than SiO 2 , including several studies reported nanogratings in GeO 2 glass, [17][18][19] binary titanium silicate glass (ULE, Corning), 20,21 and two multicomponent borosilicate glasses (BK7 and Borofloat 33, Schott). 20,22 Germanium dioxide is formed by a three-dimensional network of [GeO 4 ] tetrahedra with all bridging oxygen atoms, whereas ULE glass also possesses structure similar to pure SiO 2 24 were not revealed using scanning electron microscopy despite the induced retardance was of the same level as in Borofloat 33.…”

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confidence: 99%

Direct writing of birefringent elements by ultrafast laser nanostructuring in multicomponent glass

Fedotov

Drevinskas

Lotarev

et al. 2016

Applied Physics Letters

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“…The performance of the waveguides fabricated by ultrafast laser inscription depends on the ultrafast laser pulse (wavelength, pulse energy, pulse duration, repetition rate, and polarization) and on processing conditions (scan speed, focal depth, and irradiation geometry), as well as on the material response (substrate material properties) [3]. This technique has been successfully applied to fabricating channel waveguide devices in a wide variety of transparent materials, including glasses, crystals, ceramics, and polymers [4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Embedded optical waveguides fabricated in SF10 glass by low-repetition-rate ultrafast laser

et al. 2013

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Symmetric embedded waveguides were fabricated in heavy metal oxide SF10 glass using slit-shaped infrared femtosecond laser writing in the low-repetition frequency regime. The impact of the writing parameters on the waveguide formation in the transverse writing scheme was systemically studied. Results indicate that efficient waveguides can be inscribed in a wide parameter space ranging from 500 fs to 1.5 ps pulse duration, 0.7-4.2 μJ pulse energy, and 5 μm∕s to 640 μm∕s scan speed and pointing out the robustness of the photoinscription process. The refractive index profile reconstructed from the measured near field pattern goes up to 10 −3 . In addition, propagation losses of the waveguides are tolerable, with the lowest propagation loss estimated at 0.7 dB∕cm. With a 5 μm∕s scan speed and 3.5 μJ pulse energy in a high-dose regime, few-mode guiding was achieved in the waveguide at 800 nm signal injection wavelength. This is due to a combination of increased refractive index in the core of the trace and the appearance of a depressed cladding.

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Dependence of the femtosecond laser refractive index change thresholds on the chemical composition of doped-silica glasses

Cited by 79 publications

References 47 publications

From random inhomogeneities to periodic nanostructures induced in bulk silica by ultrashort laser

From random inhomogeneities to periodic nanostructures induced in bulk silica by ultrashort laser

Direct writing of birefringent elements by ultrafast laser nanostructuring in multicomponent glass

Embedded optical waveguides fabricated in SF10 glass by low-repetition-rate ultrafast laser

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