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Nonlinear refractive index of ultrafast laser inscribed waveguides in gallium lanthanum sulphide

Nonlinear refractive index of ultrafast laser inscribed waveguides in gallium lanthanum sulphide
Nonlinear refractive index of ultrafast laser inscribed waveguides in gallium lanthanum sulphide
We demonstrate ultrafast all-optical switching in femtosecond laser inscribed nonlinear directional couplers in gallium lanthanum sulphide operated at 1.55 μm. We report on the evaluation of the nonlinear refractive index of the waveguides forming the directional couplers by making use of the switching parameters. The nonlinear refractive index is reduced by the inscription process to about 4–5 times compared to bulk material.
0003-6935
5407-5411
Demetriou, Giorgos
2029396b-587b-4e27-8965-03e68156ed1f
Hewak, Daniel
87c80070-c101-4f7a-914f-4cc3131e3db0
Ravagli, Andrea
36bc59df-8134-42d1-9871-bcf7bab6539a
Craig, Christopher
2328b42b-552e-4a82-941d-45449e952f10
Kar, Ajoy K.
e6db194c-bb3c-4b94-ad49-f2136e089e5a
Demetriou, Giorgos
2029396b-587b-4e27-8965-03e68156ed1f
Hewak, Daniel
87c80070-c101-4f7a-914f-4cc3131e3db0
Ravagli, Andrea
36bc59df-8134-42d1-9871-bcf7bab6539a
Craig, Christopher
2328b42b-552e-4a82-941d-45449e952f10
Kar, Ajoy K.
e6db194c-bb3c-4b94-ad49-f2136e089e5a

Demetriou, Giorgos, Hewak, Daniel, Ravagli, Andrea, Craig, Christopher and Kar, Ajoy K. (2017) Nonlinear refractive index of ultrafast laser inscribed waveguides in gallium lanthanum sulphide. Applied Optics, 56 (19), 5407-5411. (doi:10.1364/AO.56.005407).

Record type: Article

Abstract

We demonstrate ultrafast all-optical switching in femtosecond laser inscribed nonlinear directional couplers in gallium lanthanum sulphide operated at 1.55 μm. We report on the evaluation of the nonlinear refractive index of the waveguides forming the directional couplers by making use of the switching parameters. The nonlinear refractive index is reduced by the inscription process to about 4–5 times compared to bulk material.

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Nonlinear refractive index of ultrafast laser inscribed - Accepted Manuscript
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Accepted/In Press date: 22 May 2017
e-pub ahead of print date: 23 June 2017
Published date: July 2017

Identifiers

Local EPrints ID: 412901
URI: http://eprints.soton.ac.uk/id/eprint/412901
ISSN: 0003-6935
PURE UUID: d6052914-6a32-4f85-a0ed-00bf1ca16be4
ORCID for Daniel Hewak: ORCID iD orcid.org/0000-0002-2093-5773
ORCID for Christopher Craig: ORCID iD orcid.org/0000-0001-6919-4294

Catalogue record

Date deposited: 08 Aug 2017 16:31
Last modified: 07 Oct 2020 04:26

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