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Single transverse-mode laser operation of Ti:sapphire rib waveguides

Single transverse-mode laser operation of Ti:sapphire rib waveguides
Single transverse-mode laser operation of Ti:sapphire rib waveguides
Ti:sapphire is an attractive laser medium for the development of miniature lasers with widely tunable output (650-1100 nm). However, due to its low peak emission cross section and short fluorescence lifetime, high pump power densities are required to achieve efficient CW lasing. A route to address this problem is to adopt channel waveguide geometries, which are characterized by lower laser thresholds than their planar waveguide counterparts due to the additional lateral confinement and excellent overlap between the laser and pump modes provided that their fabrication process does not introduce any additional loss. Having already demonstrated laser action from pulsed-laser-deposited (PLD) Ti:sapphire planar waveguides, we report here on the single mode laser operation of Ti:sapphire rib waveguides. They were fabricated in PLD-grown films, using photolithography and ion beam etching and were then coated by a 5µm thick sapphire capping layer to reduce scattering losses.
Grivas, Christos
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Shepherd, David
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May-Smith, Timothy
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Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Pollnau, M.
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Grivas, Christos
7f564818-0ac0-4127-82a7-22e87ac35f1a
Shepherd, David
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
May-Smith, Timothy
47952bbd-ce28-4507-a723-b4d80bf0f809
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Pollnau, M.
1094856b-791a-4050-98d9-c07777d5f0f5

Grivas, Christos, Shepherd, David, May-Smith, Timothy, Eason, R.W. and Pollnau, M. (2004) Single transverse-mode laser operation of Ti:sapphire rib waveguides. EPS-QEOD Europhoton Conference - Special Symposium on "Photonic Crystal Fibers and Waveguides", Lausanne, Switzerland. 28 Aug - 02 Sep 2004. 1 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Ti:sapphire is an attractive laser medium for the development of miniature lasers with widely tunable output (650-1100 nm). However, due to its low peak emission cross section and short fluorescence lifetime, high pump power densities are required to achieve efficient CW lasing. A route to address this problem is to adopt channel waveguide geometries, which are characterized by lower laser thresholds than their planar waveguide counterparts due to the additional lateral confinement and excellent overlap between the laser and pump modes provided that their fabrication process does not introduce any additional loss. Having already demonstrated laser action from pulsed-laser-deposited (PLD) Ti:sapphire planar waveguides, we report here on the single mode laser operation of Ti:sapphire rib waveguides. They were fabricated in PLD-grown films, using photolithography and ion beam etching and were then coated by a 5µm thick sapphire capping layer to reduce scattering losses.

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More information

e-pub ahead of print date: 2004
Additional Information: PD5
Venue - Dates: EPS-QEOD Europhoton Conference - Special Symposium on "Photonic Crystal Fibers and Waveguides", Lausanne, Switzerland, 2004-08-28 - 2004-09-02

Identifiers

Local EPrints ID: 41690
URI: http://eprints.soton.ac.uk/id/eprint/41690
PURE UUID: 22223b49-2a05-4302-b8ce-a0d3dc119655
ORCID for David 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: 13 Oct 2006
Last modified: 18 Feb 2021 16:37

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