Optical fiber-based sensor of harmful gas fabricated using the electronic self-assembly monolayer process

Francisco J. Arregui; Ignacio R. Matias; Richard O. Claus; Kristi L. Cooper

doi:10.1117/12.427912

4 June 2001 Optical fiber-based sensor of harmful gas fabricated using the electronic self-assembly monolayer process

Francisco J. Arregui, Ignacio R. Matias, Richard O. Claus, Kristi L. Cooper

Proceedings Volume 4253, Optical Fibers and Sensors for Medical Applications; (2001) https://doi.org/10.1117/12.427912
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

Abstract

A dichloromethane (DCM) gas optical fiber sensor has been fabricated building up a grating with poly(diallyldimethyl) ammonium chloride), poly(sodium-4-styrenesulfonate) and Poly S-119 using the Electrostatic Self-Assembly Monolayer Process. The mechanism of this sensor relies on the reflectance change of an optical grating deposited at the end of a standard communications multimode optical fiber. The total length of this grating is less than 1.5 micrometers and the structure is HLHLH, where H means material with higher refractive index and L means material with lower refractive index. Experiments with an Optical Spectrum Analyzer showed that with this technique it is also possible to choose the optical working wavelength and the reference wavelength of the sensor, in this case 1310 and 1645 nm respectively, around 1 dB of variation was observed at the working wavelength when the sensor was exposed to DCM gas. Neither hysteresis nor cross-sensitivity with temperature were detected. In addition, experimental results after 8 months from the fabrication of the sensors are also presented.

Citation Download Citation

Francisco J. Arregui, Ignacio R. Matias, Richard O. Claus, and Kristi L. Cooper "Optical fiber-based sensor of harmful gas fabricated using the electronic self-assembly monolayer process", Proc. SPIE 4253, Optical Fibers and Sensors for Medical Applications, (4 June 2001); https://doi.org/10.1117/12.427912

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