Long-period gratings in optical fibres for chemical sensor applications

Peshko, Igor; Cherry, Owen; Rutkevich, Tim; Hockley, Bernard; Rubtsov, Vladimir

doi:10.1088/0957-0233/16/11/013

Cited by 12 publications

(4 citation statements)

References 23 publications

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“…Recently, Peshko et al have described the use of commercial PDMS to coat an LPG for the detection of toluene. 15 Despite the fact that the PDMS coating was not doped and therefore its refractive index was likely lower than 1.42, toluene could be detected at levels comparable to those in our study (100 ppm). The high sensitivity achieved in this case is likely due to the use of customized gratings with very short periods of K = 120-180 mm and an operating wavelength of 850 nm.…”

Section: Discussionsupporting

confidence: 64%

“…Peshko et al have recently reported the use of commercial polydimethylsiloxane (PDMS) to coat LPGs for the detection of toluene. 15 PDMS is a popular phase for SPME and shows excellent compatibility with optical fibre materials. A detection limit of 100 ppm of toluene in water was realized using customfabricated LPGs, with a comparably short pitch of 120 to 180 mm.…”

Section: Introductionmentioning

confidence: 99%

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Chemical sensor based on a long-period fibre grating modified by a functionalized polydimethylsiloxane coating

Barnes

Dreher

Plett

et al. 2008

Analyst

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A chemical sensor based on a coated long-period grating has been prepared and characterized. Designer coatings based on polydimethylsiloxane were prepared by the incorporation of diphenylsiloxane and titanium cross-linker in order to provide enhanced sensitivity for a variety of key environmental pollutants and optimal refractive index of the coating. Upon microextraction of the analyte into the polymer matrix, an increase in the refractive index of the coating resulted in a change in the attenuation spectrum of the long-period grating. The grating was interrogated using ring-down detection as a means to amplify the optical loss and to gain stability against misalignment and power fluctuations. Chemical differentiation of cyclohexane and xylene was achieved and a detection limit of 300 ppm of xylene vapour was realized.

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Section: Discussionsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Chemical sensor based on a long-period fibre grating modified by a functionalized polydimethylsiloxane coating

Barnes

Dreher

Plett

et al. 2008

Analyst

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“…The general view of the mode envelope and exact spectral positions of the mode lines depend on the parameters of the fiber and the LPG. LPGs have applications like strain, bend, temperature, and refractive index change sensors [6][7][8]; light diffusers for medical applications [9]; and chemical sensors [10,11]. Hence, a fiber with an LPG may be used to monitor a patient's temperature and pulse, and could potentially be used to analyze the patient's blood chemical content levels.…”

Section: Introductionmentioning

confidence: 99%

Fiber photo-catheters for laser treatment of atrial fibrillation

Peshko

Rubtsov

Vesselov

et al. 2007

Optics and Lasers in Engineering

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A fiber photo-catheter has been developed for surgical treatment of atrial fibrillation with laser radiation. Atrial fibrillation (AF) is a heart rhythm abnormality that involves irregular and rapid heartbeats. Recent studies demonstrate the superiority of treating AF disease with optical radiation of the near infrared region. To produce long continuous transmural lesions, solid-state lasers and laser diodes, along with end-emitting fiber catheters, have been used experimentally. The absence of side-emitting flexible catheters with the ability to produce long continuous lesions limits the further development of this technology. In this research, a prototype of an optical catheter, consisting of a flexible 10-cm fiber diffuser has been used to make continuous photocoagulation lesions for effective maze procedure treatments. The system also includes: a flexible optical reflector; a series of openings for rapid self-attachment to the tissue; and an optional closed-loop irrigating chamber with circulating saline to cool the optical diffuser and irrigate the tissue.

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“…Here, we are particularly interested in chemical sensor applications [2], more specifically in refractive index measurements of aqueous solutions. The use of a matched pair of LPG defining an in-line modal interferometer with a coaxial-Mach-Zehnder configuration has been investigated [3] for temperature and strain measurements [4] as well as for chemical applications [5]; this interferometric structure exhibits an enhanced sensitivity to the physical and chemical properties of the surrounding media.…”

Section: Introductionmentioning

confidence: 99%

Fiber-Optic Aqueous Dipping Sensor Based on Coaxial-Michelson Modal Interferometers

et al. 2009

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Recommended by Valerio PruneriFiber-optic modal interferometers with a coaxial-Michelson configuration can be used to monitor aqueous solutions by simple dipping of few centimeters of a fiber tip. The fabrication of these sensors to work around 850 nm enables the use of compact, robust, and low-cost optical spectrum analyzers. The use of this type of portable sensor system to monitor sewage treatment plants is shown.

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Long-period gratings in optical fibres for chemical sensor applications

Cited by 12 publications

References 23 publications

Chemical sensor based on a long-period fibre grating modified by a functionalized polydimethylsiloxane coating

Chemical sensor based on a long-period fibre grating modified by a functionalized polydimethylsiloxane coating

Fiber photo-catheters for laser treatment of atrial fibrillation

Fiber-Optic Aqueous Dipping Sensor Based on Coaxial-Michelson Modal Interferometers

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