Thermally diffused waveguides in YVO4

Hettrick, S.J., Wilkinson, J.S. and Shepherd, D.P. (2001) Thermally diffused waveguides in YVO4. In, QEP-15: 15th Biennial Meeting of the Institute of Physics Quantum Electronics and Photonics Group, Glasgow, Scotland, 03 - 06 Sep 2001.


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Lasers based on planar optical waveguides have recently generated interest for use as high-average-power sources, due to a combination of attractive features including high optical gain, good thermal-power handling and compatibility with the geometry of high-power diode pump sources [1,2]. However, high-power diode pumping of monolithic plane-plane waveguide cavities generally leads to multi-mode output. One possible route to controlling the spatial output of such devices is through the use of tapered waveguides [3]. For devices of a few centimetres in length, adiabatic expansion can be achieved up to widths of a few hundred microns. This leads to structures compatible with end-pumping by broad-stripe diodes or, for higher power, side-pumping by diode bars. The latter route requires a very strong absorption of the diode emission, as the absorbing length is only a few hundred microns. Thus we have investigated thermal diffusion in YVO4 as a potential waveguide fabrication technique that is compatible with the patterning required for tapered waveguides.

Item Type: Conference or Workshop Item (Paper)
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Divisions: Faculty of Physical Sciences and Engineering > Optoelectronics Research Centre
ePrint ID: 268133
Date Deposited: 27 Oct 2009 11:06
Last Modified: 27 Mar 2014 20:14

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