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We report the first measurements of spontaneous Raman scattering from a gas sample confined in a Kagome lattice hollow core photonic crystal fibre. We compare the signal strength recorded in this fibre, with that from a similar length of hollow core photonic bandgap fibre and find that, even though the loss of the Kagome fibre is lower, the signal strength in the hollow core photonic bandgap fibre...
We report an effectively singlemode tubular antiresonant hollow core fiber with >1000nm bandwidth and record-low loss of 25dB/km, fully connectorizable with SMF28. We demonstrate penalty-free data transmission at wavelengths of 1065, 1565 and 1963nm.
We discuss our recent progress in hollow core-photonic bandgap fiber fabrication for high capacity transmission, focusing on two key areas: longitudinal uniformity and length upscaling as well as reviewing highlight results in data transmission.
A microstrip dual-band bandpass filter based on mixed electronic and magnetic coupling is proposed in this letter. The proposed circuit consists of a second-order bandpass filter and a grounded couple-line, which can generate four transmission zeros at stopband to enhance the selectivity. A prototype operating at 1.5/1.85GHz has been designed, fabricated and measured. The measured results show the...
We demonstrate a longitudinally resolved Optical Side Scattering Radiometry (OSSR) technique to measure discrete and distributed scattering loss with >60dB dynamic range and 5cm spatial resolution. We apply it to a record-length 11km hollow core photonic band-gap fibre.
We review progress in the design, fabrication and characterisation of hollow core photonic band gap fibres that have led to the production of low-latency data transmission fibres of >10 km length with 200nm bandwidth and losses at the 5dB/km level.
We report the fabrication of a record 11km length of photonic bandgap fiber supporting >200nm bandwidth with longitudinally uniform loss of ≈5dB/km at 1560nm and demonstrate error-free, low-latency, direct-detection 10Gbit/s transmission across the entire C-Band.
Power losses are an important phenomenon in type-2 superconductors. Precise evaluation of power losses in superconducting coils is crucial for designing novel machines such as superconducting motors or generators. Although ac losses are relatively easy to measure with electrical methods, it is more difficult to measure power losses in the dc mode, which is induced by varying external magnetic fields,...
A dual-polarized ceiling-mounted antenna, based on previous ceiling-mounted antennas is proposed in this letter. It consists of one vertical polarization unit and one horizontal polarization unit. The vertical polarization unit is a transformation of a monopole, looking like a tundish. And the horizontal polarization unit comprises of four dipoles on a substrate ring. The two units compose a nesting...
A simple compact dual-band dipole (48 mm × 12 mm × 0.8 mm) with shorting pins and slots is presented in this paper. The shorting pins helps to realize a compact dipole. The slots are composed of H-shape slots and comb-shape slots. The former is of help to expansion of the impedance band, and the latter to further compactness of the dipole. Its operating bandwidth is 600 MHz in the lower band and 270...
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