Fiber optic few-mode needle for refractive index sensing
Markvart A., Zavalishina L., Filonov V., Bobyleva O., Grazhdian A., Petrov A., Liokumovich L, Ushakov N.
Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, Russia
Abstract
A miniature refractive index sensor based on an intermode fiber interferometer with a tapered few-mode fiber is proposed. The sensitive area is less than a millimeter in longitudinal cross-section and less than 125 micrometers in cross-section. The sensor's performance was verified experimentally by measuring its interference response in aqueous glycerol solutions over a concentration range from 0 to 100%. The sensor can potentially be embedded into ivasive catheters for biomedical diagnostics purposes.
Speaker
Aleksandr Markvart
Peter the Great St. Petersburg Polytechnic University
Russia
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