The University of Southampton
University of Southampton Institutional Repository

Buried channel waveguides in Yb-doped KY(WO4)2 fabricated by femtosecond laser irradiation

Buried channel waveguides in Yb-doped KY(WO4)2 fabricated by femtosecond laser irradiation
Buried channel waveguides in Yb-doped KY(WO4)2 fabricated by femtosecond laser irradiation
We report on the fabrication of optical channel waveguides inside KY(WO4)2 crystals, both undoped and Yb-doped, for applications in compact solid-state lasers and three-dimensional photonic devices. Nonlinear absorption of femtosecond laser pulses has been employed in order to induce refractive-index changes in these crystals. The irradiation damage results in a decrease of the material density compared to the surrounding bulk. In this work, two types of buried channel waveguides have been fabricated in the KY(WO4)2 crystals. First ones (type I) were formed in the vicinity of the irradiated regions due to the presence of an induced compressive lattice strain, which causes an increase of the local refractive index. Light can be better confined in the second (type II) of channel waveguides that are created between pairs of damaged regions. For the best confined channels (type II), the propagation loss value measured at 1 ?m amounted to 2–2.5 dB/cm.
femtosecond-laser writing, burried channel waveguides, KY(WO4)2 crystals
0169-4332
8300-8303
Borca, C.N.
ae17633e-464e-4ee6-bfa7-9f4326817680
Apostolopoulos, V.
8a898740-4c71-4040-a577-9b9d70530b4d
Gardillou, F.
4645628a-f590-4d5b-b642-0d3c40e49625
Limberger, H.G.
10cfb4e7-08e9-429d-9ea9-b31145e5d9e5
Pollnau, M.
1094856b-791a-4050-98d9-c07777d5f0f5
Salathé, R.-P.
5938ed79-bfef-4f6f-bd1b-cdf0b69af659
Borca, C.N.
ae17633e-464e-4ee6-bfa7-9f4326817680
Apostolopoulos, V.
8a898740-4c71-4040-a577-9b9d70530b4d
Gardillou, F.
4645628a-f590-4d5b-b642-0d3c40e49625
Limberger, H.G.
10cfb4e7-08e9-429d-9ea9-b31145e5d9e5
Pollnau, M.
1094856b-791a-4050-98d9-c07777d5f0f5
Salathé, R.-P.
5938ed79-bfef-4f6f-bd1b-cdf0b69af659

Borca, C.N., Apostolopoulos, V., Gardillou, F., Limberger, H.G., Pollnau, M. and Salathé, R.-P. (2007) Buried channel waveguides in Yb-doped KY(WO4)2 fabricated by femtosecond laser irradiation. [in special issue: Photon-Assisted Synthesis and Processing of Functional Materials — E-MRS-H Symposium] Applied Surface Science, 253 (19), 8300-8303. (doi:10.1016/j.apsusc.2007.02.106).

Record type: Article

Abstract

We report on the fabrication of optical channel waveguides inside KY(WO4)2 crystals, both undoped and Yb-doped, for applications in compact solid-state lasers and three-dimensional photonic devices. Nonlinear absorption of femtosecond laser pulses has been employed in order to induce refractive-index changes in these crystals. The irradiation damage results in a decrease of the material density compared to the surrounding bulk. In this work, two types of buried channel waveguides have been fabricated in the KY(WO4)2 crystals. First ones (type I) were formed in the vicinity of the irradiated regions due to the presence of an induced compressive lattice strain, which causes an increase of the local refractive index. Light can be better confined in the second (type II) of channel waveguides that are created between pairs of damaged regions. For the best confined channels (type II), the propagation loss value measured at 1 ?m amounted to 2–2.5 dB/cm.

This record has no associated files available for download.

More information

e-pub ahead of print date: 27 February 2007
Published date: 31 July 2007
Keywords: femtosecond-laser writing, burried channel waveguides, KY(WO4)2 crystals

Identifiers

Local EPrints ID: 57099
URI: http://eprints.soton.ac.uk/id/eprint/57099
ISSN: 0169-4332
PURE UUID: 17779a39-17fe-4ca0-a3d5-656cb04f8f40
ORCID for V. Apostolopoulos: ORCID iD orcid.org/0000-0003-3733-2191

Catalogue record

Date deposited: 07 Aug 2008
Last modified: 16 Mar 2024 03:56

Export record

Altmetrics

Contributors

Author: C.N. Borca
Author: F. Gardillou
Author: H.G. Limberger
Author: M. Pollnau
Author: R.-P. Salathé

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.

×