Author/Authors :
Nikbakht، Hamed نويسنده Laser & Plasma Research Institute, Shahid Beheshti University Nikbakht, Hamed , Latifi، Hamid نويسنده Laser & Plasma Research Institute, Shahid Beheshti University Latifi, Hamid , Amini، Tahereh نويسنده Department of Physics, Shahid Beheshti University Amini, Tahereh , Zibaii، Mohammad Ismail نويسنده Laser & Plasma Research Institute, Shahid Beheshti University Zibaii, Mohammad Ismail
Abstract :
In this paper, a tapered tip optical fiber probe sensor for localized refractive index (RI) measurements is presented. This sensor’s interaction with analytes is confined to a few micro-meters which makes it a promising candidate for in-vivo or even intra-cellular RI monitoring. This tapered tip was simply fabricated by etching optical fiber with hydrofluoric acid to a conic shape with a sub-micrometer aperture. The sensor was calibrated for RI measurement using different concentrations of NaCl in water. Limit of detection of 6.7×10-5 RIU was achieved for this low-cost sensor.
