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High numerical aperture planar waveguides

High numerical aperture planar waveguides
High numerical aperture planar waveguides
Rare earth doped planar crystal waveguides have the potential to yield efficient compact diode pumped lasers and amplifiers. Confinement of pump and signal to the waveguide core leads to high small-signal gains for amplifiers and, if additional propagation losses are small, low laser thresholds. The planar geometry is well matched to the asymmetric output of high average power diodes, simplifying the coupling and mode-matching requirements. The natural slab geometry is also ideal for thermal management. Coupling the highly divergent output of high power diode lasers into waveguides, either by focussing or proximity coupling, requires relatively thick waveguides (>10µm) and, especially for proximity coupling, a high numerical aperture (NA). We report two fabrication methods that can meet these requirements; pulsed laser deposition (PLD) and thermal bonding. The fabrication details and waveguide characterisation, including Ti:Sapphire pumped laser operation, will be discussed.
Bonner, C.L.
96e1b86d-6161-469a-b090-9aacf1e96c98
Shepherd, D.P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Brown, C.T.A.
7a30f6bb-ac13-457c-9c14-c6bbc12156c4
Anderson, A.A.
646395a3-662e-4ad2-9a45-50ec63847687
Warburton, T.J.
4298ec6d-6b1a-434e-9f8f-fe95102b49a8
Tropper, A.C.
f3505426-e0d5-4e91-aed3-aecdb44b393c
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Hanna, D.C.
3da5a5b4-71c2-4441-bb67-21f0d28a187d
Bonner, C.L.
96e1b86d-6161-469a-b090-9aacf1e96c98
Shepherd, D.P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Brown, C.T.A.
7a30f6bb-ac13-457c-9c14-c6bbc12156c4
Anderson, A.A.
646395a3-662e-4ad2-9a45-50ec63847687
Warburton, T.J.
4298ec6d-6b1a-434e-9f8f-fe95102b49a8
Tropper, A.C.
f3505426-e0d5-4e91-aed3-aecdb44b393c
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Hanna, D.C.
3da5a5b4-71c2-4441-bb67-21f0d28a187d

Bonner, C.L., Shepherd, D.P., Brown, C.T.A., Anderson, A.A., Warburton, T.J., Tropper, A.C., Eason, R.W. and Hanna, D.C. (1997) High numerical aperture planar waveguides. 13th Quantum Electronics Conference (QE13), Cardiff, United Kingdom. 01 Sep 1997.

Record type: Conference or Workshop Item (Poster)

Abstract

Rare earth doped planar crystal waveguides have the potential to yield efficient compact diode pumped lasers and amplifiers. Confinement of pump and signal to the waveguide core leads to high small-signal gains for amplifiers and, if additional propagation losses are small, low laser thresholds. The planar geometry is well matched to the asymmetric output of high average power diodes, simplifying the coupling and mode-matching requirements. The natural slab geometry is also ideal for thermal management. Coupling the highly divergent output of high power diode lasers into waveguides, either by focussing or proximity coupling, requires relatively thick waveguides (>10µm) and, especially for proximity coupling, a high numerical aperture (NA). We report two fabrication methods that can meet these requirements; pulsed laser deposition (PLD) and thermal bonding. The fabrication details and waveguide characterisation, including Ti:Sapphire pumped laser operation, will be discussed.

Full text not available from this repository.

More information

Published date: 1997
Venue - Dates: 13th Quantum Electronics Conference (QE13), Cardiff, United Kingdom, 1997-09-01 - 1997-09-01

Identifiers

Local EPrints ID: 76738
URI: https://eprints.soton.ac.uk/id/eprint/76738
PURE UUID: 5e7363a7-8972-4724-a6b6-3c7c1b27563b
ORCID for D.P. Shepherd: ORCID iD orcid.org/0000-0002-4561-8184
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 28 Feb 2019 01:38

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