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

Dependence of the femtosecond laser refractive index change thresholds on the chemical composition of doped-silica glasses
Dependence of the femtosecond laser refractive index change thresholds on the chemical composition of doped-silica glasses
The refractive index changes in doped silica are investigated. We observed that the permanent isotropic index change threshold (T1) is not significantly dependent on the doping. We show that strong birefringence (permanent linear birefringence) exists in doped silica but its threshold (T2) exhibits significant dependence on the used dopants. In our conditions, comparing with silica (0.31 µJ/pulse here), for 1.5 at% Ge-doped silica the T2 threshold is smaller (0.14 ± 0.05 µJ/pulse). For a silica doped with 0.3 at% of fluorine, T2 is close to 1.20 ± 0.05 µJ/pulse. An interpretation is given not only about threshold variation but also about RIC for energies beyond. It is based on the overcoming of relaxation time in the volume interaction.
711-723
Lancry, M.
8cd458c2-f2bd-4fc3-8dca-49c430741278
Poumellec, B.
852a9506-af6c-4671-9e91-e2567fc17ab6
Chahid-Erraji, A.
df965177-f906-4744-8e69-34d1f7ab3285
Beresna, Martynas
a6dc062e-93c6-46a5-aeb3-8de332cdec7b
Kazansky, P.G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Lancry, M.
8cd458c2-f2bd-4fc3-8dca-49c430741278
Poumellec, B.
852a9506-af6c-4671-9e91-e2567fc17ab6
Chahid-Erraji, A.
df965177-f906-4744-8e69-34d1f7ab3285
Beresna, Martynas
a6dc062e-93c6-46a5-aeb3-8de332cdec7b
Kazansky, P.G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c

Lancry, M., Poumellec, B., Chahid-Erraji, A., Beresna, Martynas and Kazansky, P.G. (2011) Dependence of the femtosecond laser refractive index change thresholds on the chemical composition of doped-silica glasses. Optical Materials Express, 1 (4), 711-723. (doi:10.1364/OME.1.000711).

Record type: Article

Abstract

The refractive index changes in doped silica are investigated. We observed that the permanent isotropic index change threshold (T1) is not significantly dependent on the doping. We show that strong birefringence (permanent linear birefringence) exists in doped silica but its threshold (T2) exhibits significant dependence on the used dopants. In our conditions, comparing with silica (0.31 µJ/pulse here), for 1.5 at% Ge-doped silica the T2 threshold is smaller (0.14 ± 0.05 µJ/pulse). For a silica doped with 0.3 at% of fluorine, T2 is close to 1.20 ± 0.05 µJ/pulse. An interpretation is given not only about threshold variation but also about RIC for energies beyond. It is based on the overcoming of relaxation time in the volume interaction.

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Published date: August 2011
Organisations: Optoelectronics Research Centre

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Local EPrints ID: 196587
URI: http://eprints.soton.ac.uk/id/eprint/196587
PURE UUID: 0102e92e-212a-4d56-ae0e-4277c9b61370

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Date deposited: 09 Sep 2011 09:11
Last modified: 26 Jul 2018 16:31

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Contributors

Author: M. Lancry
Author: B. Poumellec
Author: A. Chahid-Erraji
Author: P.G. Kazansky

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