Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/70481
Title: Hollow-core microstructured optical fiber gas sensors
Authors: Yang, F 
Jin, W 
Lin, YC 
Wang, C 
Lut, H 
Tan, YZ 
Keywords: Gas detectors
Optical fiber applications
Optical fiber measurements
Optical fiber sensors
Optical spectroscopy
Photothermal interferometry
Issue Date: 2017
Publisher: Institute of Electrical and Electronics Engineers
Source: Journal of lightwave technology, 2017, v. 35, no. 16, p. 3413-3424 How to cite?
Journal: Journal of lightwave technology 
Abstract: Recent progress in gas detection with hollow-core microstructured optical fibers (HC-MOFs) and direct absorption/photothermal interferometry spectroscopy are reported. For direct-absorption sensors, the issue of mode interference noise is addressed and techniques to minimize such a noise are experimentally demonstrated. Large-scale drilling of hundreds of low-loss micro-channels along a single HC-MOF is performed, and reduction of diffusion-limited response time from hours to similar to 40 s is demonstrated with a 2.3-m-long HC-MOF. For photothermal inteferometry sensors, novel detection configurations based on respectively a Sagnac interferometer and an in-fiber modal interferometer are experimentally demonstrated. The Sagnac configuration avoids the need for complex servo-control for interferometer stabilization while the in-fiber configuration simplifies the detection, reducing the size and cost of the sensor system. Sub ppm gas detection can be achieved easily with photothermal interferometry HC-MOF sensors but is difficult to achieve for direct-absorption sensors with the current commercial HC-MOFs.
URI: http://hdl.handle.net/10397/70481
ISSN: 0733-8724
EISSN: 1558-2213
DOI: 10.1109/JLT.2016.2628092
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