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Octave-spanning supercontinuum is generated in chalcogenide, Ge23Sb7S70, waveguides pumped at 1550 nm. The 2μm side is subsequently amplified in a Thulium-doped fiber amplifier and utilized for second-harmonic generation (SHG). The generated signal has 55 dB of signal-to-noise ratio.
A heterogeneous platform i s demonstrated by integrating lithiumniobate and chalcogenide glass waveguides on silicon with optical transition through low-loss mode-converting tapers. The method provides an efficient utilization of second- and third-order nonlinearities on t he same chip for applications like stabilized octave-spanning optical combs.
Trifolium occidentale D.E. Coombe is a diploid, clonal perennial clover that is very closely related to white clover (T. repens L.). It has been previously reported to be self-pollinating and lacking in genetic diversity. However, new collections, especially in Spain and Portugal, have revealed that cross-pollinating populations with substantial genetic diversity do exist. This has led to...
Precursor films for Bi-Sr-Ca-Cu superconductors have been prepared by employing a reproducible electrochemical technique. Thick films (> 1 μm) were routinely electrodeposited, within a controlled environment, onto polished Ag substrates, from a non-aqueous solution containing the relevant dehydrated nitrate salts. The as-deposited films were analysed using energy dispersive spectroscopy (EDS)...
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