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Quasi-three-level laser operation of Yb:YAG waveguides

Quasi-three-level laser operation of Yb:YAG waveguides
Quasi-three-level laser operation of Yb:YAG waveguides
The main advantage of using waveguides in laser systems is that they produce high pump intensities over long interaction lengths for low input pump powers. This should lead to lower thresholds and more efficient lasers. Often though extra loss due to waveguide propagation reduces the benefits of this confinement. However in three-level and quasi-three-level laser systems there already exists absorption loss at the laser wavelength due to thermal population of the lower laser level. Any added waveguide propagation loss will therefore not have such a significant effect on laser performance. An example of such a laser system is Yb:YAG where 4% of the total population resides in the lower laser level. For a 6.5 at.% doped sample this is roughly equivalent to a propagation loss of 2.5db/cm which for the guides discussed here is the main contribution to the loss. The laser performance of Yb:YAG has been measured in planar waveguides made by two methods - ion-implantation and epitaxial growth.
Large, A.C.
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Hanna, D.C.
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Jones, J.K.
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Shepherd, D.P.
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Tropper, A.C.
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Chandler, P.J.
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Townsend, P.D.
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Zhang, L.
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Chartier, I.
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Ferrand, B.
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Pelenc, D.
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Large, A.C.
712e26d3-4e3b-467f-8f8c-d9e2dbc042b9
Hanna, D.C.
3da5a5b4-71c2-4441-bb67-21f0d28a187d
Jones, J.K.
9b23ec36-95a6-46ad-9b7b-48487afdd67d
Shepherd, D.P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Tropper, A.C.
f3505426-e0d5-4e91-aed3-aecdb44b393c
Chandler, P.J.
df497652-94c6-4987-9fe1-a4b93111dadf
Townsend, P.D.
d09c7d3f-d83e-43cd-8ac4-546701bb860f
Zhang, L.
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Chartier, I.
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Ferrand, B.
6d708ea8-722e-4a6c-a7ea-54bc9121f620
Pelenc, D.
320be697-57ce-4b85-82bb-c18510d87f7f

Large, A.C., Hanna, D.C., Jones, J.K., Shepherd, D.P., Tropper, A.C., Chandler, P.J., Townsend, P.D., Zhang, L., Chartier, I., Ferrand, B. and Pelenc, D. (1993) Quasi-three-level laser operation of Yb:YAG waveguides. 11th National Quantum Electronics Conference (QE-11), United Kingdom. 30 Aug - 02 Sep 1993.

Record type: Conference or Workshop Item (Paper)

Abstract

The main advantage of using waveguides in laser systems is that they produce high pump intensities over long interaction lengths for low input pump powers. This should lead to lower thresholds and more efficient lasers. Often though extra loss due to waveguide propagation reduces the benefits of this confinement. However in three-level and quasi-three-level laser systems there already exists absorption loss at the laser wavelength due to thermal population of the lower laser level. Any added waveguide propagation loss will therefore not have such a significant effect on laser performance. An example of such a laser system is Yb:YAG where 4% of the total population resides in the lower laser level. For a 6.5 at.% doped sample this is roughly equivalent to a propagation loss of 2.5db/cm which for the guides discussed here is the main contribution to the loss. The laser performance of Yb:YAG has been measured in planar waveguides made by two methods - ion-implantation and epitaxial growth.

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More information

Published date: 1993
Venue - Dates: 11th National Quantum Electronics Conference (QE-11), United Kingdom, 1993-08-30 - 1993-09-02

Identifiers

Local EPrints ID: 77308
URI: https://eprints.soton.ac.uk/id/eprint/77308
PURE UUID: 84ed031e-8ef4-4c9c-bdde-bf64c1da25c9
ORCID for D.P. Shepherd: ORCID iD orcid.org/0000-0002-4561-8184

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 06 Jun 2018 13:12

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Contributors

Author: A.C. Large
Author: D.C. Hanna
Author: J.K. Jones
Author: D.P. Shepherd ORCID iD
Author: A.C. Tropper
Author: P.J. Chandler
Author: P.D. Townsend
Author: L. Zhang
Author: I. Chartier
Author: B. Ferrand
Author: D. Pelenc

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