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Laser performance and spectroscopic analysis of optically written channel waveguides in neodymium-doped gallium lanthanum sulphide glass

Laser performance and spectroscopic analysis of optically written channel waveguides in neodymium-doped gallium lanthanum sulphide glass
Laser performance and spectroscopic analysis of optically written channel waveguides in neodymium-doped gallium lanthanum sulphide glass
We present a spectroscopic analysis and laser characterization of optically written waveguides in neodymium-doped gallium lanthanum sulphide (Nd3+-Ga:La:S) chalcogenide glass. Uniform channel waveguides were fabricated in Nd3+-Ga:La:S by exposure to radiation from a focused uv-laser beam (λ = 244nm), producing a refractive index change Δ.n ~ +10-3.

The observed laser performance and fluorescence decay were in good agreement with values calculated from a spectroscopic analysis of 85µs for the 4F3/2 lifetime and 5.9 x 10-20cm2 for the emission cross-section at 1075nm. Low threshold laser operation with emission at 1075nm and a slope efficiency of 17% is demonstrated. The active device is spatially single-mode and exhibits up to 8.6mW output power and propagation losses of <0.5 dB cm-1. Waveguide fabrication, photoinduced effects and optical characterization in terms of spectroscopy, laser performance and device attenuation are discussed.
1077-260X
1381-1388
Mairaj, A.K.
69f81e26-b09f-4c34-83ee-4388f94fa147
Chardon, A.M.
0ed30ece-5a60-4ed1-a21b-38cb0da4fd6c
Shepherd, D.P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Mairaj, A.K.
69f81e26-b09f-4c34-83ee-4388f94fa147
Chardon, A.M.
0ed30ece-5a60-4ed1-a21b-38cb0da4fd6c
Shepherd, D.P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0

Mairaj, A.K., Chardon, A.M., Shepherd, D.P. and Hewak, D.W. (2002) Laser performance and spectroscopic analysis of optically written channel waveguides in neodymium-doped gallium lanthanum sulphide glass. IEEE Journal of Selected Topics in Quantum Electronics, 8 (6), 1381-1388. (doi:10.1109/JSTQE.2002.806672).

Record type: Article

Abstract

We present a spectroscopic analysis and laser characterization of optically written waveguides in neodymium-doped gallium lanthanum sulphide (Nd3+-Ga:La:S) chalcogenide glass. Uniform channel waveguides were fabricated in Nd3+-Ga:La:S by exposure to radiation from a focused uv-laser beam (λ = 244nm), producing a refractive index change Δ.n ~ +10-3.

The observed laser performance and fluorescence decay were in good agreement with values calculated from a spectroscopic analysis of 85µs for the 4F3/2 lifetime and 5.9 x 10-20cm2 for the emission cross-section at 1075nm. Low threshold laser operation with emission at 1075nm and a slope efficiency of 17% is demonstrated. The active device is spatially single-mode and exhibits up to 8.6mW output power and propagation losses of <0.5 dB cm-1. Waveguide fabrication, photoinduced effects and optical characterization in terms of spectroscopy, laser performance and device attenuation are discussed.

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Published date: 2002

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Local EPrints ID: 13749
URI: http://eprints.soton.ac.uk/id/eprint/13749
ISSN: 1077-260X
PURE UUID: 2ccd4d74-22aa-484a-8987-38543380532a
ORCID for D.P. Shepherd: ORCID iD orcid.org/0000-0002-4561-8184
ORCID for D.W. Hewak: ORCID iD orcid.org/0000-0002-2093-5773

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Date deposited: 22 Dec 2004
Last modified: 18 Feb 2021 16:41

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Contributors

Author: A.K. Mairaj
Author: A.M. Chardon
Author: D.P. Shepherd ORCID iD
Author: D.W. Hewak ORCID iD

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