Abstract We report on the fabrication and electro-optical performance of ridge waveguide (RW) lasers emitting near 905 nm based a vertical layer structure consisting three single quantum wells (SQWs) as active regions separated by two tunnel junctions (TJs). The core is designed in such way that third mode lasing. width varied between 3 µ m 200 m. Deep- shallow-etched ridges were fabricated. sh...

A new concept for an infrared waveguide detector based on silicon is introduced. It is fabricated using silicon-on-insulator material, and consists of an erbium-doped p–n junction located in the core of a silicon ridge waveguide. The detection scheme relies on the optical absorption of 1.5m light by Er ions in the waveguide core, followed by electron–hole pair generation by the excited Er and s...

In this study, we demonstrate the influence of operating temperature variation and stress-induced effects on a silicon-on-insulator (SOI)-based multi-mode interference coupler (MMI). Here, SiGe is introduced as cladding layer to analyze its effect optical performance MMI coupler. thickness varied from 5 nm 40 nm. Characterization for ridge waveguides with both rectangular trapezoidal sidewall s...

A polarization-insensitive graphene-assisted electro-optic modulator is proposed. The orthogonal T-shaped metal slot hybrid plasmonic waveguide allows the polarization-independent propagation of transverse electric field mode and complex mode. By introduction dual-layer graphene on ridge waveguide, modulation depths TE are 0.511 dB/µm 0.502 dB/µm, respectively. 3 dB bandwidth we have proposed a...

sequencing in 2013 Single-cell sequencing is no small feat. The amount of DNA or RNA in a single cell starts at a few picograms—not even close to the quantity that today’s sequencing machines demand. So scientists must amplify these molecules and do so in ways that minimize technical errors while surveying sequences as broadly and evenly as possible. Until recently, many researchers doubted tha...

We present a new planarized waveguide geometry for THz quantum cascade laser frequency combs with improved losses, RF and thermal dissipation properties. Ridge devices display broadband free-running comb states, the emission can be further broadened by injection. Tapered feature strong field-enhancement effect, which results in an performance. This includes states single beatnotes up to nearly ...

This paper deals with ridge estimation of fuzzy nonparametric regression models using triangular fuzzy numbers. This estimation method is obtained by implementing ridge regression learning algorithm in the La- grangian dual space. The distance measure for fuzzy numbers that suggested by Diamond is used and the local linear smoothing technique with the cross- validation procedure for selecting t...