8 × 8 SOA-based optical switch with zero fiber-to-fiber insertion loss.

The design, fabrication, and characterization of an 8×8 lossless optical switch, based on semiconductor optical amplifier (SOA) gates, is reported. It comprises three stages of 2×2 switches into an 8×8 Banyan switch, for a total of 48 SOAs. Three SOAs on each optical path provide gain to compensate for on-chip and fiber coupling loss, thereby making the optical switch lossless.

Design optimization and tolerance analysis of a spot-size converter for the taper-assisted vertical integration platform in InP.

We report on the design optimization and tolerance analysis of a multistep lateral-taper spot-size converter based on indium phosphide (InP), performed using the Monte Carlo method. Being a natural fit to (and a key building block of) the regrowth-free taper-assisted vertical integration platform, such a spot-size converter enables efficient and displacement-tolerant fiber coupling to InP-based photonic integrated circuits at a wavelength of 1.31 μm.

[Multicentre observational study of Phlebodia 600 in treatment of patients with CEAP class C0-C3 chronic venous diseases].

The purpose of the study was to evaluate efficacy of Diosmin (Phlebodia 600, Innothera, France) in treatment of patients presenting with class C0s-C3 chronic venous diseases (CVD) according to the CEAP classification. Presented herein are the results of a prospective observational study aimed at assessing the outcomes of two-month administration of Phlebodia 600 (600 mg diosmin) in patients suffering from class C0s-C3 CVD according to the CEAP classification. The study comprised a total of 868 patients, including 175 (20.

Vertically integrated spot-size converter in AlGaAs-GaAs.

We report on the demonstration of a spot size converter (SSC) for monolithic photonic integration at a wavelength of 850 nm on a GaAs substrate. We designed and fabricated a dual-waveguide AlGaAs chip. The design consists of a lower waveguide layer for efficient end-fire coupling to a single-mode fiber, an upper waveguide layer for high refractive index contrast waveguides, and a vertical SSC to connect the two waveguide layers.

[Duration of anticoagulant therapy in venous thromboembolic complications].

Adequate anticoagulant therapy is a general approach to treatment of deep vein thrombosis. However, the duration of anticoagulant therapy is not strictly specified in everyday clinical practice. The present article deals with various approaches to selecting the duration of therapy with anticoagulants based on the findings of studies, national and foreign clinical guidelines.