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(Color online) Schematic of a GFP-doped sol-gel waveguide device.
(Color online) Schematic of the experimental setup. An Ar laser was coupled with a single-mode fiber into the waveguide and fluorescent light output from biosensor device was collected using an objective lens focused on a Si power meter through a dichroic beam splitter to cut off light at .
(Color online) Linearity of fluorescence power output from GFP doped waveguide, with respect to pump power at wavelength. (a) Fluorescence power until after the device fabrication. Solid circles represent fluorescence power output a few hours after device fabrication. Solid triangles represent output power ten days after fabrication. Inset shows fluorescent light output (at center wavelength) of the GFP-doped sol-gel waveguide. (b) Fluorescence power after the device fabrication.
(Color online) Reduction in fluorescence power output after application of citrate buffer ( 4.0) to the GFP-doped waveguide.
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