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Fabrication of tapered single mode fiber by chemical etching and used as chemical sensor based on evanescent field absorption

IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata

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Title Fabrication of tapered single mode fiber by chemical etching and used as chemical sensor based on evanescent field absorption
 
Creator Gangopadhyay, Tarun Kumar
Halder, A
Das, S
Paul, Mukul Chandra
Pal, Mrinmay
Salza, M
Gagliardi, G
 
Subject Engineering Materials
 
Description 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.
 
Publisher SPIE-INT SOC OPTICAL ENGINEERING
 
Date 2010
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Identifier http://cgcri.csircentral.net/213/1/1%2DSPIE_8173%2D73_Tarun_Etching_fibre%2DJune_2.pdf
Gangopadhyay, Tarun Kumar and Halder, A and Das, S and Paul, Mukul Chandra and Pal, Mrinmay and Salza, M and Gagliardi, G (2010) 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, Saturday 11 December 2010, Guwahati, India .
 
Relation http://cgcri.csircentral.net/213/