Volume 8, Issue 2 (International Journal of Optics and Photonics (IJOP) Vol 8, No 2, Summer-Fall 2014)                   IJOP 2014, 8(2): 105-111 | Back to browse issues page

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Nikbakht H, Latifi H, Amini T, Zibaii M I. Tip sensor probe for changing refractive index measurement in small volumes. IJOP 2014; 8 (2) :105-111
URL: http://ijop.ir/article-1-172-en.html
Tip sensor probe for changing refractive index measurement in small volumes
Hamed Nikbakht1 , Hamid Latifi * 1, Tahereh Amini2 , Mohammad Ismail Zibaii1
1- Laser & Plasma Research Institute, Shahid Beheshti University
2- Department of Physics, Shahid Beheshti University
Abstract:   (17624 Views)
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.
Keywords: etching, intra-cellular sensor, optical fiber tip, refractive index, tapered optical fiber
Full-Text [PDF 481 kb]   (4946 Downloads)    
Type of Study: Research | Subject: General
Received: 2014/06/2 | Revised: 2015/02/24 | Accepted: 2014/11/30 | Published: 2015/01/25
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