THz porous fibers: design, fabrication and experimental characterization

Atakaramians, Shaghik; Afshar, V Shahraam; Ebendorff-Heidepriem, Heike; Nagel, M.; Fischer, Bernd; Abbott, Derek; Monro, Tanya M.

doi:10.1364/oe.17.014053

Cited by 243 publications

(116 citation statements)

References 20 publications

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“…To achieve such structures numerous techniques have been developed such as capillary stacking [6], drilling [7,8], and extrusion [9,10]. Each technique has its own advantages, for example, capillary stacking can be used to create highly regular periodic structures, drilling can be used to form arbitrarily located circular features, while extrusion has the capacity to form non-circular features [11,12]. Of particular interest here is the sensing ability of MOFs.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2014

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Femtosecond laser written Bragg gratings have been written in exposed-core microstructured optical fibers with core diameters ranging from 2.7 µm to 12.5 µm and can be spliced to conventional single mode fiber. Writing a Bragg grating on an open core fiber allows for real-time refractive index based sensing, with a view to multiplexed biosensing. Smaller core fibers are shown both experimentally and theoretically to provide a higher sensitivity. A 7.5 µm core diameter fiber is shown to provide a good compromise between sensitivity and practicality and was used for monitoring the deposition of polyelectrolyte layers, an important first step in developing a biosensor.

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Section: Introductionmentioning

confidence: 99%

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

et al. 2014

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“…By the suitable selection of glass or polymer material and geometry the dispersion, nonlinearity, birefringence, polarization, evanescent field and mode area of the propagating light can be optimized to specific applications. This has led to innovations in supercontinuum generation [4], fiber lasers [5], terahertz wave guiding [6], fibers with high numerical apertures [7,8], sensors [9][10][11][12], and makes MOFs an excellent candidate for new high-capacity transmission multicore and endlessly single mode telecommunications fibers [13].…”

Section: Introductionmentioning

confidence: 99%

Predicting the drawing conditions for Microstructured Optical Fiber fabrication

Kostecki¹,

Ebendorff-Heidepriem²,

Warren‐Smith³

et al. 2013

Opt. Mater. Express

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The efficient and accurate fabrication of Microstructured optical fibers (MOFs) requires a practical understanding of the 'draw process' beyond what is achievable by trial and error, which requires the ability to predict the experimental drawing parameters needed to produce the desired final geometry. Our results show that the Fitt et al. fluid-mechanics model for describing the draw process of a single axisymmetric capillary fiber provides practical insights when applied to more complex multi-hole symmetric and asymmetric MOF geometries. By establishing a method to relate the multi-hole MOF geometry to a capillary and understanding how material temperature varies with the draw tower temperature profile, it was found that analytical equations given by the Fitt model could be used to predict the parameters necessary for the chosen structure. We show how this model provides a practical framework that contributes to the efficient and accurate fabrication of the desired MOF geometries by predicting suitable fiber draw conditions.

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“…One strategy first demonstrated by Chen et al is to use a subwavelength core surrounded by an air cladding [7,8]. In order to further reduce the loss, a porous structure of sub-wavelength holes can be introduced into the already sub-wavelength solid core of the fiber [10][11][12][13][14][28][29][30], as first predicted numerically by Hassani et al [10,28] and then demonstrated by Dupuis et al [29] and later Atakaramians et al [13]. Due to the boundary conditions in the electric flux density the refractive index step between material and air in the sub-wavelength holes pushes the field into the lower index holes, thereby increasing the fraction of power in air and reducing the absorption losses [30].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of porous-core honeycomb bandgap THz fibers

Bao

Nielsen²,

Rasmussen³

et al. 2012

Opt. Express

138

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We present a numerical and experimental investigation of a lowloss porous-core honeycomb fiber for terahertz wave guiding. The introduction of a porous core with hole size of the same dimension as the holes in the surrounding honeycomb cladding results in a fiber that can be drawn with much higher precision and reproducibility than a corresponding air-core fiber. The high-precision hole structure provides very clear bandgap guidance and the location of the two measured bandgaps agree well with simulations based on finite-element modeling. Fiber loss measurements reveal the frequency-dependent coupling loss and propagation loss, and we find that the fiber propagation loss is much lower than the bulk material loss within the first band gap between 0.75 and 1.05 THz.

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THz porous fibers: design, fabrication and experimental characterization

Cited by 243 publications

References 20 publications

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

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

Predicting the drawing conditions for Microstructured Optical Fiber fabrication

Fabrication and characterization of porous-core honeycomb bandgap THz fibers

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