Ta'eed, M.Shokooh-Saremi, M.Fu, L.Moss, D.Rochette, M.Littler, I.Brunelli, S.Ruan, Y.Luther-Davies, B.2007-07-052007-07-052005Optics Letters, 2005; 30(21):2900-29020146-95921539-4794http://hdl.handle.net/2440/34932This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?URI=ol-30-21-2900. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.enCopyright © 2005 Optical Society of AmericaJournal article002006338510.1364/OL.30.0029000002327868000222-s2.0-2784447774250964