Optical fibre transducers applications

Many optical fibre chemical sensors employ optical fibre transducers that are interfaced with immobilized chemical reagent(s). At the chemical transducer end, active chemical/biochemical reagents are held on supporting polymeric matrices and covered by membrane materials in certain applications. The following sections review some developments in this field. 

The classic solution is the application of current and voltage transformers, usually as a cast resin embedded type. As a certain disadvantage of inductive transducers, their small frequency range may be considered. Other solutions for current sensors are Rogowski coils (with active or passive integrators) or the fibre-optic current sensor, based upon the Faraday effect [20]. 

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