Sensors 2011, 11(2), 1558-1564; doi:10.3390/s110201558
Long Period Gratings in Random Hole Optical Fibers for Refractive Index Sensing
Center for Photonics Technology, Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA 24061, USA
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Received: 4 January 2011 / Revised: 18 January 2011 / Accepted: 19 January 2011 / Published: 27 January 2011
(This article belongs to the Section Physical Sensors)
Abstract
We have demonstrated the fabrication of long period gratings in random hole optical fibers. The long period gratings are fabricated by a point-by-point technique using a CO2 laser. The gratings with a periodicity of 450 µm are fabricated and a maximum coupling efficiency of −9.81 dB has been achieved. Sensing of different refractive indices in the surrounding mediums is demonstrated by applying standard liquids with refractive indices from 1.400 to 1.440 to the long period grating. View Full-Text
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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MDPI and ACS Style
Wang, K.; Pickrell, G. Long Period Gratings in Random Hole Optical Fibers for Refractive Index Sensing. Sensors 2011, 11, 1558-1564.