Journal Article10.1364/AO.45.004567
Optical fiber long-period grating humidity sensor with poly(ethylene oxide)/cobalt chloride coating
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TL;DR: A long-period fiber grating (LPFG) humidity sensor is reported utilizing poly(ethylene oxide)/cobalt chloride (PEO/CoCl2) as a hybrid hygrosensitive cladding coating.
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Abstract: A long-period fiber grating (LPFG) humidity sensor is reported utilizing poly(ethylene oxide)/cobalt chloride (PEO/CoCl2) as a hybrid hygrosensitive cladding coating. A thin overlay of the material is deposited on the LPFG and with exposure to different ambient humidity levels, its spectral properties are modified. The material parameters associated with the sensing mechanism may include those of refractive index, absorption, and morphological alterations of the overlaid material. Relative humidity variations in the range from 50% to 95% have been detected with a resolution better than 0.2%. The response time constant of the fiber sensor is of the order of a few hundred milliseconds.
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Citations
Synthesis and characterization of cobalt chloride/poly(ethylene oxide) electrospun hybrid nanofibers
Adurafimihan A. Abiona,John A. Ajao,Samuel Chigome,Jean B. Kana Kana,G. A. Osinkolu,Malik Maaza +5 more
TL;DR: In this article, the CoCl2/PEO hybrid nanofibers with diameters ranging from 500 to 700 nm were successfully synthesized by a simple and versatile approach of electrospinning.
13
Enhancing the tuning range of a single resonant band long period grating while maintaining the resonant peak depth by using an optimized high index indium tin oxide overlay.
Jonathan Lee,Qin Chen,Qiming Zhang,Karl Reichard,Dave Ditto,John Mazurowski,Michael Hackert,Shizhuo Yin +7 more
TL;DR: The authors have experimentally demonstrated a LPG coated with ITO that can be tuned in excess of 200 nm with an ambient refractive index change of less than 0.01, to the best of the authors' knowledge, this is the highest sensitivity reported for a LGas to date.
13
ArF excimer laser microprocessing of polymer optical fibers for photonic sensor applications
TL;DR: In this paper, a study of polymer optical fiber microstructuring by use of deep ultraviolet excimer laser radiation at 193 nm wavelength is performed, where the ablation characteristics of the fiber cladding and core materials are analyzed comparatively.
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A miniature optical humidity sensor
Jinesh Mathew,Yuliya Semenova,Gerald Farrell +2 more
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TL;DR: In this article, a miniature optical humidity sensor based on a polymer infiltrated photonic crystal fiber interferometer (PCFI) is reported for the first time, which is improved by infiltrating the microholes of the PCF with a hygroscopic polymer.
11
Design of a gas sensor based on a sensitive film coated phase-shifted long-period fiber grating
Xiuli Jiang,Zhengtian Gu +1 more
TL;DR: In this paper, a sensitive film coated long-period fiber grating with π phase shift introduced at the center is proposed for gas sensing and the sensitivity of the sensor is defined as the rate of change of the transmission at a specific wavelength with the film refractive index.
10
References
Long-period fiber gratings as band-rejection filters
Ashish Madhukar Vengsarkar,Paul Joseph Lemaire,J. B. Judkins,Vikram Bhatia,Turan Erdogan,John E. Sipe +5 more
TL;DR: In this paper, a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters is presented.
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Optical fibre long-period grating sensors: characteristics and application
Stephen W. James,Ralph P. Tatam +1 more
TL;DR: In this paper, the authors reviewed recent research on fiber optic long-period gratings (LPGs) with emphasis placed upon the characteristics of LPGs that make them attractive for applications in sensing strain, temperature, bend radius and external index of refraction.
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Optical fiber humidity sensor based on a tapered fiber coated with agarose gel
TL;DR: An optical fiber humidity sensor (OFHS) was fabricated using a hydrophilic gel (agarose) deposited on the thinner zone of a biconically tapered single-mode optical fiber as discussed by the authors.
288
Long period gratings as solution concentration sensors
TL;DR: In this article, an optical fiber long-period grating (LPG) was used for the refractometry of sodium chloride, calcium chloride and ethylene glycol aqueous solutions.
184
Optical sensor for the determination of moisture
A.P. Russell,K.S. Fletcher +1 more
TL;DR: The spectrum of cobalt chloride on the fiber is similar to a transmission spectrum rather than an attenuated totla reflection (a.t.r.) spectrum because of the refractive index of the film which is slightly greater than that of the fiber.
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