http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/1824 Thu, 20 Jun 2013 05:15:39 GMT 2013-06-20T05:15:39Z http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/1825 Direction Dependent Transmission Characteristics of Dye Mixture Doped Polymer Optical Fibre Preforms Kailasnath, M; V P N Nampoori; Radhakrishnan, P; Nishant Kumar; Bikas, Ranjan The direction dependant wavelength selective transmission mechanism in poly (methyl methacrylate)(PMMA) rods doped with C 540 dye and C 540:Rh.B dye mixture as a combination has been investigated. When a polished slice of pure C 540 doped polymer rod was used side by side with a C540:Rh B doped rod with acceptor concentration [A] = 7x10-4 m/l , we could notice more than 100% change in the transmitted intensity along opposite directions at the C 540, Rh B emission and the excitation wavelengths . A blue high bright LED emitting at a peak wavelength 465nm was used as the excitation source. Mon, 01 Dec 2008 00:00:00 GMT http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/1825 2008-12-01T00:00:00Z