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In-Line Gas Sensor Based on a Photonic Bandgap Fiber With Laser-Drilled Lateral Microchannels

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5 Author(s)
Lehmann, H. ; Dept. of Fiber Opt., Inst. of Photonic Technol. (IPHT), Jena, Germany ; Bartelt, H. ; Willsch, R. ; Amezcua-Correa, R.
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The fabrication, characterization, and gas sensor application of a hollow core photonic bandgap fiber (HC-PBGF) with laser drilled lateral microchannels will be described. The HC-PBGF was tailor-made for gas sensing applications in the near infrared region from 1.5 to 1.7 μm wavelengths, covering the first harmonic absorptions of quite a number of natural gas components. Laser-drilled, lateral microchannels makes access to the light guiding core of the HC-PBGF and offers the ability to realize fast-responding, distributed gas sensor cells with large optical path lengths. The application of those cells in a distributed sensor arrangement using white light spectroscopy combined with chemometrical methods as interrogation method will be demonstrated.

Published in:

Sensors Journal, IEEE  (Volume:11 ,  Issue: 11 )