In line gas sensor based on a photonic band gap fiber with laser drilled lateral micro channels
in: IEEE Sensors Journal (2011)
The fabrication, characterization and gas sensor application of a hollow core photonic band gap fiber (HC-PBGF) with laser drilled lateral micro channels will be described. The HC-PBGF was tailor-made for gas sensing applications in the near infrared region from 1.5 µm to 1.7 µm wavelengths, covering the 1st harmonic absorptions of quite a number of natural gas components. Laser-drilled, lateral micro channels 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.