The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Within neodymium-doped laser crystals, the doping of fluorite-type single crystals reveal the unique possibility for high-energy laser amplification at 1µm, which makes these materials especially appealing to the field of nuclear physics, particularly inertial confinement fusion. In this work, a complete and detailed spectroscopic investigation of CaF2:Nd3+ single crystals co-doped with various concentrations...
We analyse transparent wavelength routed optical networks using three different fiber types: NZDSF, SMF PSCF, and verify the effectiveness of Hybrid Raman/EDFA Fiber Amplification (HFA) with different pumping levels, up to the moderate 60% pumping regime. Nodes operate on the basis of flexible-grid elastic NyWDM transponders able to adapt the modulation format to the quality-of-transmission of the...
We discuss quantum light emission from solid state single photon sources, either based on single InGaAs quantum dots or trapped excitonic complexes in monolayer WSe2. Embedding InGaAs quantum dots in micropillar cavities, we can simultaneously obtain high purity, bright (up to 75% extraction efficiency) and coherent emission of single photons. Single photon emission in monolayers of transition metal...
In this paper, a new bidirectional pumping scheme with dual order forward pumps is proposed. Performance is compared numerically with conventional bidirectional and backward only pumping schemes for a 70 nm bandwidth, 61.5 km distributed Raman amplifier. We demonstrate that it is possible to design a flat gain spectrum with improved noise figure and OSNR, as well as a low gain ripple (< 1 dB).
We numerically optimise the span length that gives the lowest signal power asymmetry between transmitted and conjugated channels in a DWDM transmission with fibre based mid-link optical phase conjugation.
Distributed Raman amplification has different roles to play in combination with of a range of potential solutions to deal with the nonlinear Shannon limit. Here, we will cover issues such as asymmetry optimisation for optical-phase conjugation nonlinear compensation, the combination of optimised distributed amplification with digital nonlinear compensation techniques and the challenges of adopting...
Infrared photoluminescence properties are investigated for Pr3+ containing fluoroindate glasses with formula (mol% compositions) (99-x)[40InF3−20SrF2−20BaF2−20ZnF2]:xPrF3 (x= 0.1, 0.2, 0.5, 1.0 and 2.0 mol%). Different mechanisms of population and quenching for Pr3+1D2 and 1G4 levels are shown from photoluminescence (PL), photoluminescence excitation (PLE) and decay time values. Cross relaxation...
Semiconductor organometallic halide perovskites (CH3NH3PbX3, X=Cl, Br, I) (HPVK) have emerged as a new promising material able to improve the optoelectronic technology performance. Although this material has mostly been applied to improve the efficiency of photovoltaic devices, it also shows amazing properties for photonic applications. In particular, HPVK exhibits high photoluminescence (PL) quantum...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.