1,721,399 research outputs found
Dataset for: Composite Material Hollow Antiresonant fibres
No full textData for the paper Belardi, Walter, De Lucia, Francesco, Poletti, Francesco and Sazio, Pier J. (2017) Composite material hollow antiresonant fibers Optics Letters, 42, (13), pp. 2535-2538. doi:10.1364/OL.42.002535</span
Dataset for Temperature insensitive fiber interferometry
No full textData supporting the paper Zhu, Wenwu ; Numkam Fokoua, Eric ; Chen, Yong ; Bradley, Thomas ; Petrovich, Marco ; Poletti, Francesco ; Zhao, Mingshan ; Richardson, David ; Slavík, Radan. / Temperature insensitive fiber interferometry. In: Optics Letters. 2019</span
Data for Compact micro-optic based components for hollow core fibers
No full textData for the paper Jung, Yongmin ; Kim, Hyuntai ; Chen, Yong ; Bradley, Thomas ; Davidson, Ian ; Hayes, John ; Jasion, Gregory ; Sakr, Hesham ; Rikimi, Shuichiro ; Poletti, Francesco ; Richardson, David, 'Compact micro-optic based components for hollow core fibers', accepted for publication in Optics Express, November 2019</span
Nested antiresonant nodeless hollow core fiber
No full textWe propose a novel hollow core fiber design based on nested and non-touching antiresonant tube elements arranged around a central core. We demonstrate through numerical simulations that such a design can achieve considerably lower loss than other state-of-the-art hollow fibers. By adding additional pairs of coherently reflecting surfaces without introducing nodes, the Hollow Core Nested Antiresonant Nodeless Fiber (HC-NANF) can achieve values of confinement loss similar or lower than that of its already low surface scattering loss, while maintaining multiple and octave-wide antiresonant windows of operation. As a result, the HC-NANF can in principle reach a total value of loss – including leakage, surface scattering and bend contributions – that is lower than that of conventional solid fibers. Besides, through resonant out-coupling of high order modes they can be made to behave as effectively single mode fibers
Direct and inverse design of microstructured optical fibres
Full text linkMicrostructured optical fibres, where an arrangement of air holes running longitudinally along the fibre guides light in either a solid or a hollow core, have created new opportunities in diverse areas of science and technology. Applications range from the generation of supercontinuum light to optical sensing, nonlinear telecom devices and the generation and delivery of extremely high optical powers. Photonic bandgap fibres, allowing light guidance in a hollow core, are also extensively studied. The main issues preventing accurate simulations of the properties of fabricated fibres are identified and addressed. An ideal, accurate representation of a realistic fibre is then proposed and employed to obtain fundamental scaling rules and to study the interactions between air guided and surface guided modes. Anticrossings between these modes in slightly asymmetric structures are identified as the cause for the unusual polarisation effects experimentally observed in these fibres. And finally, guidelines for fabricating fibres with the widest possible operational bandwidth possible are developed and presented
Advances in hollow optical fiber technologies and applications
No full textA vibrant field, ~20 years old, Big potential, big challenges. Enormous progress from first fibre; lots more still to be done (and according to modelling, possible) Main Highlights:. Data transmitting HCFs with ~1dB/km, broad bandwidth and excellent modal properties now available. Potential to outperform conventional fibres indicated by modelling Main challenges:. Very small production volumes; untested in large scale manufacturing. Many practical issues still to be investigated.</p
Hollow core fiber with an octave spanning bandgap
Full text linkWe thoroughly compare the out-of-plane bandgaps generated by three realistic two-dimensional lattices: a triangular and a square arrangement of holes and a triangular arrangement of rods. We demonstrate that, for any given hole diameter-to-pitch ratio d/Λ, the triangular arrangement of interconnected resonators generates the widest possible bandgap along the air line, and we propose a physical interpretation explaining these results. The design of a hollow core photonic bandgap fiber based on such a lattice and able to transmit light with sub-decibel-per-meter losses over an octave of frequencies is presented for the first time, to the best of our knowledge
Description of ultrashort pulse propagation in multimode optical fibers
No full textThe guided, single-mode propagation of ultrashort optical pulses is commonly described by a well studied and understood generalized nonlinear Schrödinger equation. Here we present and discuss an extended version for multimode optical fibers and waveguides including polarization effects, high-order dispersion, Kerr and Raman nonlinearities, self-steepening effects, as well as wavelength-dependent mode coupling and nonlinear coefficients. We then investigate the symmetry properties of the nonlinear coupling coefficients for the cases of step-index and circularly symmetric conventional fibers and for microstructured fibers with hexagonal symmetry. Finally, we study the computational complexity of the proposed algorithm
Dynamics of femtosecond supercontinuum generation in multimode fibers
No full textWe solve a system of generalized nonlinear Schrödinger equations to study the nonlinear dynamics of ultrashort pulse propagation in multimode fibers. Due to pulse walk-off, permanent intermodal power transfer between modes is observed even in absence of phase matching. The strength of intermodal effects is found to depend strongly on modal symmetries, which results in preferential coupling between the LP0n modes. The scaling of nonlinear multimode effects in large-core fibers for the generation of ultra-high power spectral density supercontinua is finally discussed
Ultra-Long-Haul WDM Transmission Using NANF Hollow-Core Fiber
No full textHollow-core fiber NANF prototypes have recently achieved lower loss and wider bandwidth than SMF. Theory predicts further progress may be possible. We investigate the potential impact of future high-performance NANFs on long-haul optical communication systems
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