Optrodes of photonic fiber to pH sensor

In this paper, design of optrodes of photonic optical fiber to a pH sensor with a pH dye is described. The sensor is prepared by immobilizing blue bromophenol, as a pH dye, using sol-gel technique with a photonic optical fiber. The physical principle is based in the absorption of the optrodes of the light from a laser diode as an emitter, and as transducer we use a photoresist for electronic conditioning of the signal.