Fabrication of low-loss, small-core exposed core microstructured optical fibers

Schartner, Erik P.; Dowler, Alastair; Ebendorff‐Heidepriem, Heike

doi:10.1364/ome.7.001496

Cited by 19 publications

(16 citation statements)

References 21 publications

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“…The exposed-core fibers used here are microstructured optical fibers that confine light through three longitudinal air holes [15][16][17], as seen in the scanning electron microscopy (SEM) image in Fig.1a. The air holes introduce a large refractive index mismatch so that the light can be guided in a micrometre sized core of the same material as the cladding (see Fig.1b).…”

Section: Exposed-core Fibersmentioning

confidence: 99%

Quantum noise limited nanoparticle detection with exposed-core fiber

Mauranyapin¹,

Madsen²,

Booth³

et al. 2019

Opt. Express

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Label-free biosensors are important tools for clinical diagnostics and for studying biology at the single molecule level. The development of optical label-free sensors has allowed extreme sensitivity, but can expose the biological sample to photodamage. Moreover, the fragility and complexity of these sensors can be prohibitive to applications. To overcome these problems, we develop a quantum noise limited exposed-core fiber sensor providing robust platform for label-free biosensing with a natural path toward microfluidic integration. We demonstrate the detection of single nanoparticles down to 25 nm in radius with optical intensities beneath known biophysical damage thresholds.

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Section: Exposed-core Fibersmentioning

confidence: 99%

Quantum noise limited nanoparticle detection with exposed-core fiber

Mauranyapin¹,

Madsen²,

Booth³

et al. 2019

Opt. Express

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“…Such sensitivity is comparable with that of two-arm interferometers [13,14], twomode one-fibre interferometers based on elliptical core fibres [15], mismatched-core fibres [16], liquid-crystal-clad fibres [17], and photonic crystal fibres [18]. [ [9][10][11]19,20]. Two of these holes are fully enclosed by silica, but the third hole is open such that the top surface of the Y-shaped core can be accessed from the outer space across the fibre length.…”

Section: Introductionmentioning

confidence: 77%

Modal interferometric refractive index sensing in microstructured exposed core fibres

2019

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Optical fibre-based sensors measuring refractive index shift in bodily fluids and tissues are versatile and accurate probes of physiological processes. Here, we suggest a refractive index sensor based on a microstructured exposed-core fibre (ECF). By considering a high refractive index coating of the exposed core, our modelling demonstrates the splitting of the guided mode into a surface sensing mode and a mode that is isolated from the surface. With the isolated mode acting as a reference arm, this two-mode one-fibre solution provides for robust interferometric sensing with a sensitivity of up to 60, 000 rad/RIU-cm, which is suitable for sensing subtle physiological processes within hard-to-reach places inside living organisms, such as the spinal cord, ovarian tract and blood vessels. © 20192. Two-mode microstructured exposed core fibreWe consider a standard ECF structure [19] (Fig. 1) that consists of a Y-shaped silica core (the refractive index n co = 1.4607, 2.2 µm size) formed by three elliptical air holes (n air = 1)

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“…Active pressurization was used during the draw on the central cane piece, to stabilize the structure. [15] The fiber has an outer diameter of 220 µm (see Figure S2a, Supporting Information) and an effective core diameter of 2 µm.…”

Section: Methodsmentioning

confidence: 99%

Scalable Functionalization of Optical Fibers Using Atomically Thin Semiconductors

et al. 2020

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The light-matter interaction length in monolayer transition metal dichalcogenides (TMD) [1,2] on planar substrates is restricted to sub-nanometers due to their miniscule thickness. Atomically thin transition metal dichalcogenides are highly promising for integrated optoelectronic and photonic systems due to their exciton-driven linear and nonlinear interactions with light. Integrating them into optical fibers yields novel opportunities in optical communication, remote sensing, and all-fiber optoelectronics. However, the scalable and reproducible deposition of high-quality monolayers on optical fibers is a challenge. Here, the chemical vapor deposition of monolayer MoS 2 and WS 2 crystals on the core of microstructured exposed-core optical fibers and their interaction with the fibers' guided modes are reported. Two distinct application possibilities of 2D-functionalized waveguides to exemplify their potential are demonstrated. First, the excitonic 2D material photoluminescence is simultaneously excited and collected with the fiber modes, opening a novel route to remote sensing. Then it is shown that third-harmonic generation is modified by the highly localized nonlinear polarization of the monolayers, yielding a new avenue to tailor nonlinear optical processes in fibers. It is anticipated that the results may lead to significant advances in optical-fiber-based technologies.

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Fabrication of low-loss, small-core exposed core microstructured optical fibers

Cited by 19 publications

References 21 publications

Quantum noise limited nanoparticle detection with exposed-core fiber

Quantum noise limited nanoparticle detection with exposed-core fiber

Modal interferometric refractive index sensing in microstructured exposed core fibres

Scalable Functionalization of Optical Fibers Using Atomically Thin Semiconductors

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