Femtosecond optical pulses have applications in optical communication, astronomical frequency combs, and laser spectroscopy. Here, a hybrid mode-locked erbium-doped fiber (EDF) laser with topological insulator (TI) is proposed, for the first time to our best knowledge. The pulsed laser deposition (PLD) method is employed to fabricate the fiber-taper TI saturable absorber (TISA). By virtue of th...

We demonstrate for the first time a multi-wavelength laser based on a bismuth-based erbium-doped fiber (Bi-EDF) assisted by a four-wave mixing (FWM) process. Using a simple linear cavity resonator scheme containing a 49 cm long highly nonlinear Bi-EDF, we obtained about 8 lines of optical comb with a line spacing of approximately 0.52 nm at the maximum 1480 nm pump power of 160mW.

Remi A. Carmigniani1,†, Michel Benoit2, Damien Violeau3 and Morteza Gharib4 1Saint-Venant Hydraulics Laboratory, Joint Research Unit EDF – Cerema – Ecole des Ponts, 78401 Chatou, France 2Institut de Recherche sur les Phénomènes Hors-Equilibre (IRPHE, UMR 7342), Aix-Marseille Université, CNRS, Centrale Marseille, 13013 Marseille, France 3EDF and Saint-Venant Hydraulics Laboratory, Joint Research...

Earliest-deadline-first (EDF) is good for scheduling real-time tasks in order to meet timing constraint. However, it is not good enough for scheduling real-time disk tasks to achieve high disk throughput. In contrast, although SCAN can maximize disk throughput, its schedule results may violate real-time requirements. Thus, during the past few years, various approaches were proposed to combine E...

The theorem of Hohenberg and Kohn 1 concerning the existence of a universal Energy Density Functional (EDF), and its subsequent implementation as a Local Density Approximation (LDA), lead to a new qualitative approach to the study of electron systems, from atoms, to molecules, to condensed matter systems and macromolecules in particular and other fermionic systems in general. Even though neithe...

This paper presents a heavy-traffic analysis of the behavior of a single-server queue under an Earliest-Deadline-First (EDF) scheduling policy, in which customers have deadlines and are served only until their deadlines elapse. The performance of the system is measured by the fraction of reneged work (the residual work lost due to elapsed deadlines), which is shown to be minimized by the EDF po...

With the growing complexity of modern embedded real-time systems, scheduling and managing of resources has become a daunting task. While scheduling and resource management for internal events can be simplified by adopting a commonplace real-time operating system (RTOS), scheduling and resource management for external events are left in the hands of the programmer, not to mention managing resour...

Spore formation in the Gram-positive bacterium Bacillus subtilis has been classically viewed as an example of unicellular differentiation that occurs in response to nutritional starvation. We present evidence that B. subtilis produces an extracellular factor(s) that is required, in addition to starvation conditions, for efficient sporulation. This factor is secreted and accumulates in a cell de...

The OS scheduler’s memory and runtime overheads form crucial design constraints for embedded systems implemented on low-cost hardware platforms. Table-driven scheduling can provide a high level of schedulability; however, it also consumes significant amounts of memory. By contrast, effective non-preemptive scheduling policies, such as the non-workconserving Critical-Window EDF (CW-EDF), have lo...