%0 Journal Article %A Jafari, Jalil %A Nouroozi, Rahman %T Fabrication and Characterization of the Fiber Optical Taper for a Surface Plasmon Resonance Sensor %J International Journal of Optics and Photonics %V 11 %N 1 %U http://ijop.ir/article-1-267-en.html %R 10.18869/acadpub.ijop.11.1.19 %D 2017 %K chemical etching, fiber optical taper, optical fiber, surface plasmon resonance, sensors., %X For a fiber optical surface plasmon resonance (SPR) sensor a short part of its cladding should be removed to coat a thin layer of a metal. Usually this is problematic when an optical fiber with small core diameter is used. In this paper, a new method using µliter droplet of the HF acid for short fiber optical taper fabrication is reported. Using this method in a multi-mode optical fiber with the core/cladding size of 50/125 µm a 2 mm long taper with 40 µm diameter is fabricated. Roughness of its surface is investigated using an atomic force microscopy. The measured mean value of the roughness is about 8 nm. A 60 nm thin layer of pure silver is coated on the taper surface in order to investigate its performance using a fiber optical SPR sensor. Using this SPR fiber sensor measurement of the lead concentrations in water ranging from 0.1 to 10 part per million (ppm) is reported. %> http://ijop.ir/article-1-267-en.pdf %P 19-24 %& 19 %! %9 Research %L A-10-506-1 %+ Physics Department, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan %G eng %@ 1735-8590 %[ 2017