These tiny lasers are formed into a co-axial shape and work at room=20 temperature. http://www.bbc.co.uk/news/science-environment-16925088 Colin -- cdb, 3/07/2009 =20 -- colin@btech-online.co.uk --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .