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Proceedings Paper

Spectral characterisation of erbium-doped microspherical lasers
Author(s): Brian J. Shortt; Jonathan Ward; Danny O'Shea; Síle Nic Chormaic
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Paper Abstract

We present continuing theoretical and experimental investigations into the characterisation of fibre taper coupled microspherical lasers. We investigate the spectral emissions of these micro resonators as a function of the wavelength and power of the pump radiation. We also consider various means of efficiently coupling radiation into and out of these devices. We are particularly interested in studying emissions about 1.55 μm with the aim of exploiting potential telecommunications applications of these devices. We study microspheres with diameters in the range 40-150 μm. Pump light about 980 nm or 1480 nm is coupled into the microsphere through evanescent wave coupling between microsphere and optical fibre. The resulting spatial and spectral distribution of radiation within the spheres is described by whispering gallery modes. Half and full-taper optical fibres are used to both couple the pump light into the sphere and to out couple the resulting infra red lasing. The physics of whispering gallery modes and the challenges of coupling to such modes is discussed. Experimental techniques and results will be presented and future directions indicated.

Paper Details

Date Published: 25 April 2006
PDF: 11 pages
Proc. SPIE 6187, Photon Management II, 618708 (25 April 2006);
Show Author Affiliations
Brian J. Shortt, Cork Institute of Technology (Ireland)
Tyndall National Institute (Ireland)
Jonathan Ward, Cork Institute of Technology (Ireland)
Tyndall National Institute (Ireland)
Danny O'Shea, Cork Institute of Technology (Ireland)
Tyndall National Institute (Ireland)
Síle Nic Chormaic, Cork Institute of Technology (Ireland)
Tyndall National Institute (Ireland)


Published in SPIE Proceedings Vol. 6187:
Photon Management II
John T. Sheridan; Frank Wyrowski, Editor(s)

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