Optical biotransducers, used in optical biosensors for signal transduction, use photons in order to collect information about analyte. These are highly sensitive, highly specific, small in size and cost effective.
The detection mechanism of optical biotransducer depends upon the enzyme system that converts analyte into products which are either oxidized or reduced at the working electrode.
Evanescent field detection principle is most commonly used in an optical biosensor system as the transduction principle . This principle is one of the most sensitive detection methods. It enables the detection of fluorophores exclusively in the close proximity of the optical fiber.