Gangopadhyay, Tarun Kumar and Halder, Arindam and Das, S and Paul, Mukul Chandra and Pal, Mrinmay and Salza, M and Gagliardi, G (2011) Fabrication of tapered single mode fiber by chemical etching and used as chemical sensor based on evanescent field absorption. In: Photonics 2010: Tenth International Conference on Fiber Optics and Photonics , Dec 11-15, 2010 , Guwahati, India.

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Abstract

Single mode tapered fiber (SMTF) has been fabricated with core diameter of 8 mu m and reduced cladding diameter up to 11 mu m by hydrofluoric acid (HF) etching technique. To obtain the required cladding diameter, the time of etching has been optimized by using different HF concentrations. The mechanism as well as kinetics path of etching reaction on standard optical fiber is discussed. This study is related to surface catalyzed dissociation of HF followed by direct reaction with adsorbate molecules and the surface silicon oxide molecules. The etched tapered fibers are then packaged on quartz substrate to use as sensor element. Finally, the etched fiber is used as an element within chemical sensor based on evanescent field absorption. In this experiment, a 419-ppm cobalt nitrate solution is used for sensing.

Item Type:	Conference or Workshop Item (Paper)
Additional Information:	Photonics 2010 - 10th International Conference on Fiber Optics and Photonics, Guwahati, INDIA, DEC 11-15, 2010 DOI: 10.1117/12.899603
Uncontrolled Keywords:	Tapered single mode fiber; Chemical etching; Kinetics path of etching reaction; Evanescent field absorption; Chemical sensor
Subjects:	Processing Science
Divisions:	Fiber Optics and Photonics
Depositing User:	Bidhan Chaudhuri
Date Deposited:	07 Aug 2012 11:51
Last Modified:	30 Mar 2016 09:54
URI:	http://cgcri.csircentral.net/id/eprint/1728

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