Fabrication, splicing, Bragg grating writing, and polyelectrolyte functionalization of exposed-core microstructured optical fibers

Warren‐Smith, Stephen C.; Kostecki, Roman; Nguyen, Linh V.; Monro, Tanya M.

doi:10.1364/oe.22.029493

Cited by 54 publications

(36 citation statements)

References 55 publications

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“…One air hole of the preform is then cut or polished open, exposing the core to the surrounding medium on that side. The preform is then drawn with well-controlled pressure inside the holes into an ECF [20]. In this way, even if the ECF is spliced at both ends, liquid containing analyte can still have direct access to the evanescent field of light propagating along the core.…”

Section: Multimode Interference In Exposed Core Microstructured Opticmentioning

confidence: 99%

“…The mode coupling was controlled by means of aligning the ECF and the SMF for maximum transmitted power through the ECF core using the in-built translation stages of a Fujikura fusion splicer (FSM-100P). We also optimized the splicing conditions for our particular case of standard SMFs (Corning SMF-28) [20] to achieve consistent coupling conditions. It should be noted that for a different type of SMF (e.g.…”

Section: Experimental Procedures and Measurementmentioning

confidence: 99%

“…Of its many advantageous characteristics compared with conventional microstructured optical fibers, the most distinctive one is that ECF can be spliced with standard SMFs to form all-fiber configuration [20], while the light propagating in the core still has direct contact with analyte suspended in the surrounding medium thanks to the exposed core. Here we propose and experimentally demonstrate a novel platform for label-free biosensing that utilizes the multimode interference effect in an ECF.…”

Section: Introductionmentioning

confidence: 99%

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Interferometric-type optical biosensor based on exposed core microstructured optical fiber

Nguyen

Hill

Warren‐Smith

et al. 2015

Sensors and Actuators B: Chemical

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In all cases accepted manuscripts should:  link to the formal publication via its DOI  bear a CC-BY-NC-ND license -this is easy to do, click here to find out how  if aggregated with other manuscripts, for example in a repository or other site, be shared in alignment with our hosting policy  not be added to or enhanced in any way to appear more like, or to substitute for, the published journal article Abstract: This work presents a novel biosensor using the multimode interference effect in an exposed core microstructured optical fiber (ECF). In this work biotin molecules are immobilized onto the ECF core surface to serve as the capturing probe for streptavidin, the target molecules.Since each distinct guided mode in the ECF interacts with the surrounding medium differently, the interference between any two specific modes will experience a fringe shift (or phase change) upon a change in the refractive index (RI) of the surrounding medium, or a localized RI change on the surface of the ECF core as a result of a biological binding event. In our experiment, the interferometric sensing platform was realized by splicing a section of ECF with lead-in and leadout single mode fibers (SMFs). An interference pattern is obtained in the transmission spectrum as the result of multiple excited modes (excited and re-collected at the lead-in and lead-out splicing points) propagating in the ECF with different propagation constants. The interference pattern is non-uniform, indicating that there are more than two modes involved. Fast Fourier transform (FFT) is used to separate individual interference patterns that contribute to this complex spectrum and monitor their phase changes upon RI variation of the surrounding medium. In this way multiple RI sensitivities can be realized because each spatial frequency possesses a distinct sensitivity with respect to the surrounding RI. The operation of this device was validated by measuring the phase changes that occur when the sensing platform was subjected to solutions of different RIs or functionalized with different molecules. A biosensor was demonstrated based on this novel platform using biotin as the capturing probe to detect streptavidin with low non-specific adsorption. The proposed platform is reliable, cost-effective, and offers a potential label-free biosensing alternative to the widely used surface plasmon resonance (SPR) technique.

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Section: Multimode Interference In Exposed Core Microstructured Opticmentioning

confidence: 99%

Section: Experimental Procedures and Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interferometric-type optical biosensor based on exposed core microstructured optical fiber

Nguyen

Hill

Warren‐Smith

et al. 2015

Sensors and Actuators B: Chemical

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“…It has been shown in Ref. 51 that the silica EC-MOF fibers can be spliced to single mode fiber for improved handling and integration with commercial interrogation units. Methods are under development to fully connectorize the EC-MOF into a system which incorporates the interrogation and detection instrumentation for use as a field-portable demonstrator.…”

Section: Discussionmentioning

confidence: 99%

Fiber optic approach for detecting corrosion

et al. 2016

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Corrosion is a multi-billion dollar problem faced by industry. The ability to monitor the hidden metallic structure of an aircraft for corrosion could result in greater availability of existing aircraft fleets. Silica exposedcore microstructured optical fiber sensors are inherently suited towards this application, as they are extremely lightweight, robust, and suitable both for distributed measurements and for embedding in otherwise inaccessible corrosion-prone areas. By functionalizing the fiber with chemosensors sensitive to corrosion by-products, we demonstrate in-situ kinetic measurements of accelerated corrosion in simulated aluminum aircraft joints.

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“…The Bragg grating high temperature sensors 12 were fabricated by using a point-by-point technique previously developed for writing ablation gratings onto the surface of exposed-core microstructured optical fibers 14,15 . This technique involves focusing 800 nm femtosecond laser (Hurricane Ti:sapphire) pulses onto the surface of the core using a 50X long working distance microscope objective.…”

Section: Sensor Fabrication and Operation Principlementioning

confidence: 99%

High temperature sensing with single material silica optical fibers

et al. 2017

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Authors, or their employers in the case of works made for hire, retain the following rights: 1. All proprietary rights other than copyright, including patent rights. 2. The right to make and distribute copies of the Paper for internal purposes. 3. The right to use the material for lecture or classroom purposes. 4. The right to prepare derivative publications based on the Paper, including books or book chapters, journal papers, and magazine articles, provided that publication of a derivative work occurs subsequent to the official date of publication by SPIE.5. The right to post an author-prepared version or an official version (preferred version) of the published paper on an internal or external server controlled exclusively by the author/employer, provided that (a) such posting is noncommercial in nature and the paper is made available to users without charge; (b) a copyright notice and full citation appear with the paper, and (c) a link to SPIE's official online version of the abstract is provided using the DOI (Document Object Identifier) link. Citation format:Author(s), "Paper Title," Publication Title, Editors, Volume (Issue) Number, Article (or Page) Number, (Year). Copyright notice format:Copyright XXXX (year) Society of Photo-Optical Instrumentation Engineers. 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 modification of the content of the paper are prohibited. DOI abstract link format:http://dx.doi.org/DOI# (Note: The DOI can be found on the title page or online abstract page of any SPIE article.) March 2018High temperature sensing with single material silica optical fibers ABSTRACTWe present recent developments in high temperature sensing using single material silica optical fibers. By using a single material fiber, in this case a suspended-core fiber, we avoid effects due to dopant diffusion at high temperature. This allows the measurement of temperatures up to the dilatometric softening temperature at approximately 1300 o C. We demonstrate and compare high temperature sensing in two configurations. The first exploits a small section of single material fiber spliced onto a length of conventional single mode fiber, which operates through multimode interference. The second utilizes a type II fiber Bragg grating written via femtosecond laser ablation.

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Fabrication, splicing, Bragg grating writing, and polyelectrolyte functionalization of exposed-core microstructured optical fibers

Cited by 54 publications

References 55 publications

Interferometric-type optical biosensor based on exposed core microstructured optical fiber

Interferometric-type optical biosensor based on exposed core microstructured optical fiber

Fiber optic approach for detecting corrosion

High temperature sensing with single material silica optical fibers

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