Chemical and biochemical sensing applications of microstructured optical fiber‐based systems

Calcerrada, Matías; García-Ruiz, Carmen; González‐Herráez, Miguel

doi:10.1002/lpor.201500045

Cited by 72 publications

(33 citation statements)

References 156 publications

(203 reference statements)

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“…MOF is a special fiber in which an array of periodic or non-periodic micro holes is present in the fiber cladding surrounding the core. These fibers exhibit unique light-guiding properties and drew the attention in the biochemical sensing due to the capability of using the cladding as a microfluidic channel [29], which can consist of a few big holes (50-60 μm diameter) or of many small holes (3-10 μm diameter) depending on the fiber type. In this case, the evanescent field directly interacts with the liquid passing through the holes, thus, enabling potentially high sensitivity in a small volume of solution while preserving the fiber integrity and geometry.…”

Section: Fundamentalsmentioning

confidence: 99%

Biosensing with optical fiber gratings

et al. 2017

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Optical fiber gratings (OFGs), especially longperiod gratings (LPGs) and etched or tilted fiber Bragg gratings (FBGs), are playing an increasing role in the chemical and biochemical sensing based on the measurement of a surface refractive index (RI) change through a label-free configuration. In these devices, the electric field evanescent wave at the fiber/surrounding medium interface changes its optical properties (i.e. intensity and wavelength) as a result of the RI variation due to the interaction between a biological recognition layer deposited over the fiber and the analyte under investigation. The use of OFG-based technology platforms takes the advantages of optical fiber peculiarities, which are hardly offered by the other sensing systems, such as compactness, lightness, high compatibility with optoelectronic devices (both sources and detectors), and multiplexing and remote measurement capability as the signal is spectrally modulated. During the last decade, the growing request in practical applications pushed the technology behind the OFG-based sensors over its limits by means of the deposition of thin film overlays, nanocoatings, and nanostructures, in general. Here, we review efforts toward utilizing these nanomaterials as coatings for high-performance and low-detection limit devices. Moreover, we review the recent development in OFG-based biosensing and identify some of the key challenges for practical applications. While high-performance metrics are starting to be achieved experimentally, there are still open questions pertaining to an effective and reliable detection of small molecules, possibly up to single molecule, sensing in vivo and multi-target detection using OFG-based technology platforms.

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Section: Fundamentalsmentioning

confidence: 99%

Biosensing with optical fiber gratings

et al. 2017

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“…For this purpose, there have already been some previous works with different proposals such as a microchanneled fiber [49-51], a D-shaped fiber [52, 53], exposed core fibers [1,8], . .…”

Section: Discussionmentioning

confidence: 99%

“…The field of chemical sensing is nowadays of great importance [1] in industry, security [2,3], biomedical applications [4,5], manufacturing processes and fuel transportation [6]. In particular, fiber-optic based chemical sensors have shown interesting properties either for the detection of specific gases in air [7][8][9] or chemicals in solution [10].…”

Section: Introductionmentioning

confidence: 99%

Distributed photothermal spectroscopy in microstructured optical fibers: towards high-resolution mapping of gas presence over long distances

García-Ruiz

Pastor-Graells

Martins³

et al. 2017

Opt. Express

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, 2017, "Distributed photothermal spectroscopy in microstructured optical fibers: towards high-resolution mapping of gas presence over long distances", Optics Express, vol.25, n.3, pp. 1789Express, vol.25, n.3, pp. -1805 Available at http://dx.doi.org/10.1364/OE.25.001789 © 2017 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. Abstract: Chemical sensing using optical fibers is often challenging, as it is generally difficult to achieve strong interaction between the guided light and the analyte at the wavelength of interest for performing the detection. Despite this difficulty, many schemes exist (and can be found in the literature) for point chemical fiber sensors. However, the challenge increases even further when it comes to performing fully distributed chemical sensing. In this case, the optical signal which interacts with the analyte is typically also the signal that has to travel to and from the interrogator: for a good sensitivity, the light should interact strongly with the analyte, leading inevitably to an increased loss and a reduced range. Few works in the literature actually provide demonstrations of truly distributed chemical sensing and, although there have been several attempts to realize these sensors (e.g. based on special fiber coatings), the vast majority of these attempts has failed to reach widespread use due to several reasons, among them: lack of sensitivity or selectivity, lack of range or resolution, cross sensitivity to temperature or strain, or need to work at specific wavelengths where fiber instrumentation becomes extremely expensive or unavailable. In this work we provide a preliminary demonstration of the possibility of achieving distributed detection of gas presence with spectroscopic selectivity, high spatial resolution, potential for long range measurements and feasibility of having most of the interrogator system working at conventional telecom wavelengths. For a full exploitation of this concept, new fibers (or more likely, fiber bundles) should be developed capable of guiding specific wavelengths in the IR (corresponding to gas absorption wavelengths) with good overlap with the analyte while also having a solid core with good transmission behavior at 1.55 µm, and good thermal coupling between the two guiding structures. Article begins on next page)

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“…Through slight modifications of the sensing fiber, sensors for weight [15], electromagnetic field [16], humidity [17], or even chemicals [18][19][20] have been proposed. On the other hand, the challenge of designing a distributed hot-wire anemometer suits the scope of the fiber-optics sensors community.…”

Section: Introductionmentioning

confidence: 99%

Long-range distributed optical fiber hot-wire anemometer based on chirped-pulse ΦOTDR

et al. 2018

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Abstract:We demonstrate a technique allowing to develop a fully distributed optical fiber hot-wire anemometer capable of reaching a wind speed uncertainty of ≈ ±0.15 m/s (±0.54 km/h) at only 60 mW/m of dissipated power in the sensing fiber, and within only four minutes of measurement time. This corresponds to similar uncertainty values than previous papers on distributed optical fiber anemometry but requires two orders of magnitude smaller dissipated power and covers at least one order of magnitude longer distance. This breakthrough is possible thanks to the extreme temperature sensitivity and single-shot performance of chirped-pulse phase-sensitive optical time domain reflectometry (ΦOTDR), together with the availability of metal-coated fibers. To achieve these results, a modulated current is fed through the metal coating of the fiber, causing a modulated temperature variation of the fiber core due to Joule effect. The amplitude of this temperature modulation is strongly dependent on the wind speed at which the fiber is subject. Continuous monitoring of the temperature modulation along the fiber allows to determine the wind speed with singular low power injection requirements. Moreover, this procedure makes the system immune to temperature drifts of the fiber, potentially allowing for a simple field deployment. Being a much less power-hungry scheme, this method also allows for monitoring over much longer distances, in the orders of 10s of km. We expect that this system can have application in dynamic line rating and lateral wind monitoring in railway catenary wires.

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Chemical and biochemical sensing applications of microstructured optical fiber‐based systems

Cited by 72 publications

References 156 publications

Biosensing with optical fiber gratings

Biosensing with optical fiber gratings

Distributed photothermal spectroscopy in microstructured optical fibers: towards high-resolution mapping of gas presence over long distances

Long-range distributed optical fiber hot-wire anemometer based on chirped-pulse ΦOTDR

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