The University of Southampton
University of Southampton Institutional Repository

Fabrication and characterization of continuous wave direct UV (lambda=244nm) written channel waveguides in chalcogenide (Ga:La:S) glass

Fabrication and characterization of continuous wave direct UV (lambda=244nm) written channel waveguides in chalcogenide (Ga:La:S) glass
Fabrication and characterization of continuous wave direct UV (lambda=244nm) written channel waveguides in chalcogenide (Ga:La:S) glass
Gallium lanthanum sulphide (Ga:La:S) optical glass is an interesting material, for both fiber and planar technologies, as it offers possibilities for a wide array of devices suitable for use in both non-linear applications and as IR lasers. Direct laser writing into this glass has yielded low loss single mode channel waveguides. Samples were exposed to above bandgap illumination of focused UV (lambda = 244 nm) light at varying intensities (Iuv = 1.5 to 90 kW/cm2) and scan velocities ( Vscan = 0.005 to 0.067 m/s). The exposed regions were evaluated through atomic force microscopy (AFM) and surface compaction (0.3 - 3.6µm) was observed. Sample topography was examined using a scanning electron microscope (SEM) with analysis of chemical changes within the exposed regions performed with energy dispersive x-ray microscopy (EDAX). Waveguide attenuation was measured to be 0.2 ±0.1 dB/cm at 1.3µm with a positive change in refractive index (Delta.n = 10-3). The chemical mechanism for these photoinduced changes with resulting photodensification has been correlated with a relative increase in the lanthanum content within the waveguide core.
0733-8724
1578-1584
Mairaj, A.K.
69f81e26-b09f-4c34-83ee-4388f94fa147
Hua, P.
92fa76e2-970b-45f5-a459-d9f95e735303
Rutt, H.N.
e09fa327-0c01-467a-9898-4e7f0cd715fc
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Mairaj, A.K.
69f81e26-b09f-4c34-83ee-4388f94fa147
Hua, P.
92fa76e2-970b-45f5-a459-d9f95e735303
Rutt, H.N.
e09fa327-0c01-467a-9898-4e7f0cd715fc
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0

Mairaj, A.K., Hua, P., Rutt, H.N. and Hewak, D.W. (2002) Fabrication and characterization of continuous wave direct UV (lambda=244nm) written channel waveguides in chalcogenide (Ga:La:S) glass. IEEE Journal of Lightwave Technology, 20 (8), 1578-1584. (doi:10.1109/JLT.2002.800266).

Record type: Article

Abstract

Gallium lanthanum sulphide (Ga:La:S) optical glass is an interesting material, for both fiber and planar technologies, as it offers possibilities for a wide array of devices suitable for use in both non-linear applications and as IR lasers. Direct laser writing into this glass has yielded low loss single mode channel waveguides. Samples were exposed to above bandgap illumination of focused UV (lambda = 244 nm) light at varying intensities (Iuv = 1.5 to 90 kW/cm2) and scan velocities ( Vscan = 0.005 to 0.067 m/s). The exposed regions were evaluated through atomic force microscopy (AFM) and surface compaction (0.3 - 3.6µm) was observed. Sample topography was examined using a scanning electron microscope (SEM) with analysis of chemical changes within the exposed regions performed with energy dispersive x-ray microscopy (EDAX). Waveguide attenuation was measured to be 0.2 ±0.1 dB/cm at 1.3µm with a positive change in refractive index (Delta.n = 10-3). The chemical mechanism for these photoinduced changes with resulting photodensification has been correlated with a relative increase in the lanthanum content within the waveguide core.

Full text not available from this repository.

More information

Published date: 2002
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 13756
URI: http://eprints.soton.ac.uk/id/eprint/13756
ISSN: 0733-8724
PURE UUID: 073addb8-2db0-4e78-b6b3-59426f38ee2f
ORCID for D.W. Hewak: ORCID iD orcid.org/0000-0002-2093-5773

Catalogue record

Date deposited: 06 Jan 2005
Last modified: 19 Nov 2019 01:59

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×