A simple fiber-optic chemical sensor which may be used to detect in-situ and in real time concentrations and chemical transformation of liquids and pastes is reported. The sensor, comprised of a tunable IR diode laser source and a cladding-free multimode IR fiber, operates on the principle of evanescent field absorption spectroscopy. The sensor's response is theoretically analyzed and experimentally verified.
Fiber-Optic-Based Evanescent Field Infrared Spectroscopy Using Tunable Diode Lasers
Infrared Fiber Optics ; 1989 ; Los Angeles,CA,United States
Proc. SPIE ; 1048
1989-06-02
Conference paper
Electronic Resource
English
Fiber-Optic Evanescent Field Absorption Sensor: A Theoretical Evaluation
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