1,721,346 research outputs found
Hollow core fiber with an octave spanning bandgap
No full textWe demonstrate that amongst all known lattices, a triangular arrangement of interconnected resonators generates the widest possible out-of-plane bandgap. A photonic bandgap fiber with an octave spanning transmission range is presented for the first time
Microstructured optical fibres for gas sensing: design fabrication and post-fab processing
No full textAir/silica Microstructured Optical Fibers (MOFs) offer new prospects for fiber based sensor devices. In this paper, two topics of particular significance for gas sensing using air guiding Photonic Bandgap Fibers (PBGFs) are discussed. First, we address the issue of controlling the modal properties of PBGFs and demonstrate a single mode, polarization maintaining air guiding PBGF. Secondly, we present recent improvements of a femtosecond laser machining technique for fabricating fluidic channels in PBGFs, which allowed us to achieve cells with multiple side access channels and low additional loss
Air core photonic bandgap fibers for high capacity data transmission: challenges, potential and state-of-the-art
No full textNonlinear mode coupling of ultra-short pulses in optical fibres
No full textA generalized nonlinear Schrodinger equation to model pulse propagation in multimode optical fibers is presented. Fiber symmetries are invoked to significantly reduce computation times. Finally, implications for multimode supercontinuum generation are discussed
Ultra-Long-Haul WDM Transmission Using NANF Hollow-Core Fiber
Full text linkHollow-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
Recensione a: S. SARTESCHI, Per la Commedia e non per essa soltanto, Roma, Bulzoni, 2002
No full textOpportunities and Challenges for Long-Distance Transmission in Hollow-Core Fibres
Full text linkAnti-resonant hollow-core fiber of the Nested Antiresonant Nodeless type (NANF) has been showing a steady decrease in loss over the last few years, gradually approaching that of standard Single-Mode Fiber (SMF). It already by far outperforms SMF as to non-linear effects, which are three to four orders of magnitude lower in NANF than in SMF. Theoretical predictions and experimental evidence also hint at a much wider usable bandwidth than SMF, potentially amounting to several tens of THz. Propagation speed is 50% faster, a key feature in certain contexts. In this paper we investigate the potential impact of possible future high-performance NANF on long-haul optical communication systems, assuming NANF continues on its current steady path towards better performance. We look at the system throughput in different long-haul scenarios, addressing links of various length, from 100~km to 4,000~km, and different NANF optical bandwidths, loss and total launch power. We compare such throughput with a benchmark state-of-the-art SMF Raman-amplified C+L system. We found that NANF might enable relative throughput gains vs.~the benchmark on the order of 1.5x to 5x, at reasonable NANF and system parameter values. We also study the problem of the impact of NANF Inter-Modal-Interference (IMI) on system performance and show that a value of -60~dB/km, close to the currently best reported values, is low enough to have no substantial harmful effect. We finally look at a more long-term scenario in which NANF loss gets below that of SMF and we show that in this context repeterless or even completely amplifierless systems might be possible, delivering 300-400 Tb/s per NANF, over 200 to 300~km distances. The system simplification and ease of wideband exploitation implied by these systems might prove quite attractive especially in densely populated regions where inter-node distances are modest. While several technological hurdles remain towards NANF systems becoming practical contenders, in our opinion NANF appears to have the potential to become an attractive and possibly disruptive alternative to conventional solid-core silica fibers
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