We report simulations and experimental results of THz QCLs with quasi-periodic resonators based on a Fibonacci sequence. Terahertz quantum cascade lasers were first demonstrated in 2002 [1] and have since undergone rapid development. One of the most active areas of reasearch into these devices has been the development of devices emitting in a single longitudinal mode through the use of distribu...

To better understand Fe cycling in marine and freshwater systems, we have developed a biomolecular tool to track the perceived bioavailability of Fe to heterotrophic bacteria. Bioluminescent reporters, constructed by fusing the fepA–fes promoter of Escherichia coli (an Enterobactin biosynthesis gene regulated by the ferric uptake regulatory [Fur] system) to a luxCDABE cassette, were integrated ...

Gasification system performance generally depends on feed moisture content, activity of bed material, gasifier and combustor temperatures, scrubber media. The tar concentration gas composition product are two indicators the gasification performance. In this research, effects temperature material produced from a dual fluidized (DFB) power plant were investigated. DFB is located in Nong Bua distr...

A novel method to extract the grating coupling coefficient of distributed feedback (DFB) lasers by comparing theoretical and experimental values side mode spacing is demonstrated. Compared with traditional method, proposed in this paper transforms solution process lasing model multiple unknown parameters into that only coefficient, which significantly reduces computational workload. Furthermore...

Organic solid state lasers have attracted considerable attentions because they have the potential to be tunable, flexible, biocompatible, and easily integrated into plastic optoelectronics.[1–8] Optically pumped laser has been reported in a very broad range of conjugated polymers and oligomers. However, for the electrically pumped organic lasers, there still exist many challenging problems to b...

Injection locking of two DFB semiconductors opens new possibilities to generate effective signals for optical sensing, in order to reach better performances. Pure wave forms can be generated with qualities exceeding those obtained using external modulators. This is illustrated through the application to the distributed Brillouin sensing that shows significant progress with respect to establishe...

A Raman fibre laser based on phase shifted DFB structures is modelled for the first time. Using parameters of realistic devices, the model predicts low-threshold and highly-efficient laser output. The change of position and width of the phase shift were found to have a substantial impact on laser performance.

In this work, we experimentally and theoretically investigate the optical electrical optimization of an OLED associated to a mixed-order DFB cavity. We, firstly focus on design fabrication cavity with high quality factor. We particularly study impact deposition organic layers topology factor

Recent studies demonstrate that dissolved iron in seawater is bound to strong organic complexes that have stability constants comparable to those of microbial iron chelates. We examined iron acquisition by seven strains of heterotrophic marine bacteria from a number of siderophore–iron complexes, including desferrioxamine B (DFB) and marine siderophores partially purified from iron-limited cult...