Browsing by subject "0205 Optical Physics"
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Deformable wire array: fiber drawn tunable metamaterials
Published 2017By fiber drawing we fabricate a wire array metamaterial, the structure of which can be actively modified. The plasma frequency can be tuned by 50% by compressing the metamaterial; recovers when released and the process can ...Open AccessConference paper -
Experimental evaluation of the dosimetric impact of intrafraction prostate rotation using film measurement with a 6DoF robotic arm
Published 2020Purpose: Tumor motion during radiotherapy can cause a reduction in target dose coverage and an increase in healthy tissue exposure. Tumor motion is not strictly translational and often exhibits complex six degree-of-freedom ...Open AccessArticle -
Flexible optical fiber sensor based on polyurethane
Published 2017Polyurethane (PU) based hollow core fibers are investigated as optical sensors. The flexibility of PU fibers makes it suitable for sensing mechanical perturbations. We fabricated a PU fiber using the fiber drawing method, ...Open AccessConference paper -
Generalized dispersion Kerr solitons
Published 2020We report a continuum of pulse-like soliton solutions to the generalized nonlinear Schr ̈odinger equation with both quadratic and quartic dispersion and a Kerr nonlinearity. We show that the well-known nonlinear Schr ...Open AccessArticle -
Generalized self-similar propagation and amplification of optical pulses in nonlinear media with high-order normal dispersion
Published 2021We investigate theoretically and numerically the self-similar propagation of optical pulses in the presence of gain, positive Kerr nonlinearity and positive (i.e. normal) dispersion of even order m. Starting from a modified ...Open AccessArticle -
Highly deformable optical fibers made of polyurethane: OAM generation, tunable metamaterials and sensors
Published 2017Polyurethane has a Young’s modulus three orders of magnitude lower than silica and can be stretched up to 600%. We report the fabrication of polyurethane optical fibers for applications from THz to the visible. We exploit ...Open AccessConference paper -
Measurement of weak low frequency pressure signal using stretchable polyurethane fiber sensor for application in wearables
Published 2017The practical realization of low Young’s modulus Polyurethane (PU) based optical fibers offers new possibilities for sensing on bodies due to its bio-compatibility and high material sensitivity. Here, we experimentally ...Open AccessConference paper -
Multimaterial and Flexible Devices Made by Fiber Drawing
Published 2020The ability to co-process different materials at the same time in a thermal process opens up the possibility of scalable fabrication of volumetric multimaterial and multifunctional devices with operation spanning from the ...Open AccessConference paper -
OAM generation, tunable metamaterials and sensors with highly deformable fibers
Published 2018A flexible fiber-drawn material, i.e. polyurethane, allows for novel applications from THz to the visible. We exploit its elastic properties to generate orbital angular momentum modes, to make pressure sensors and to ...Open AccessConference paper -
Orbital angular momentum modes by twisting of a hollow core antiresonant fiber
Published 2017Generation and use of orbital angular momentum (OAM) of light is finding more and more interest in a wide variety of fields of photonics: communications, optical trapping, quantum optics, and many more [1]. In the investigation ...Open AccessConference paper -
Pulse wave velocity measurement with soft-polymer optical fibers for wearable continuous blood pressure monitoring
Published 2020Soft-polymer fibers allow strong conformal contact with the skin and are extremely sensitive for deformation, despite high propagation loss. This enables pulse wave velocities measurements. Blood pressure can then be ...Open AccessConference paper -
Stationary and Dynamical Properties of Pure-Quartic Solitons
Published 2019We numerically solve a generalized nonlinear Schrödinger equation and find a family of pure-quartic solitons, existing through a balance of positive Kerr nonlinearity and negative quartic dispersion. These solitons have ...Open AccessArticle -
Tunable Metamaterials Fabricated by Fiber Drawing
Published 2017We demonstrate a practical scalable approach to the fabrication of tunable metamaterials. Designed for terahertz (THz) wavelengths, the metamaterial is comprised of polyurethane filled with an array of indium wires using ...Open AccessArticle -
Wearable polyurethane optical fiber based sensor for breathing monitoring
Published 2018We experimentally demonstrate a wearable breathing monitoring sensor based on a polyurethane (PU) optical fiber. The mechanical flexibility of the PU fiber allows for the simple measurement of inhalation and exhalation ...Open AccessConference paper