In this Letter, we report a carbon dioxide gas sensor having 547 pieces of thin-film modified capillaries, which are derived from a microstructured polymer optical fiber preform. Compared with the conventional absorption-based sensor, the monolithic polymer capillary waveguide arrays have better sensitivity, because the huge sensing surfaces, composed of 547 pieces of dye-indicator-doped porous ethyl cellulose layers, interact directly with the gas molecules. As far as we know, a gas sensor based on multichannel capillary waveguide arrays has not been reported before.
© 2010 Optical Society of America
Remote Sensing and Sensors
Original Manuscript: June 30, 2010
Revised Manuscript: September 3, 2010
Manuscript Accepted: September 9, 2010
Published: September 28, 2010
Jian Wang and Lili Wang, "Carbon dioxide gas sensor derived from a 547-hole microstructured polymer optical fiber preform," Opt. Lett. 35, 3270-3272 (2010)