All-optical label swapping is a promising approach to ultra-high packet-rate routing and forwarding directly in the optical layer. In this paper, we review results of DARPA Next Generation Internet program all-optical at University California Santa Barbara (UCSB). We describe overall network encapsulate packets with labels process functions independent packer bit rate format. Various approaches coding using serial subcarrier multiplexing addressing associated techniques for erasure...

The numerical treatment of free surface problems in ferrohydrodynamics is considered. Starting from the general model, special attention paid to field–surface and flow–surface interactions. Since some situations these feedback interactions can be partly or even fully neglected, simpler models derived. application such simulation dissipative systems, rotary shaft seals, equilibrium shapes ferrofluid drops, pattern formation normal-field instability layers given. Our strategy able recover...

Abstract High-intensity low-background neutron diffraction and high-pressure anvil technique have been used in the studies of magnetic materials up to pressures 10 GPa (sapphire anvils) 24.5 (diamond temperature range 1.5–300 K. Results powder single-crystal experiments are reported. A new state with partial moment reorientation has detected hematite α-Fe2O3, at above 2.5–3 GPa. Incommensurate commensurate phases TbD2+x (x=0, 0.2), studied, stabilization incommensurate phase was found under...

A theoretical model suitable for both static and dynamic analysis of widely tunable multisection grating assisted codirectional coupler with rear sampled reflector (GCSR) lasers is described in this paper. For the first time wide tunability as well transient behavior such are simulated. The based on transfer matrix method (TMM) combination multimode rate equation takes into account a number physical processes laser cavity longitudinal mode spatial hole burning, nonlinear gain compression,...

Very low wavelength chirp (static < 0.07 GHz/mA and dynamic 0.09 GHz/mA) was measured for a directly-modulated fibre grating laser with an angled facet semiconductor chip short grating. Low-penalty transmission at 2.5 Gbit/s over 312 km of standard singlemode has been demonstrated using this low-chirp device.

Abstract A numerical solution strategy for calculating equilibrium free surfaces of a magnetic fluid under the action field is proposed and applied to determine shapes linear magnetisable ferrofluid drop in uniform field. Hysteresis phenomena deformation with ends, close conical, were observed numerically. (© 2004 WILEY‐VCH Verlag GmbH &amp; Co. KGaA, Weinheim)

Simultaneous wavelength conversion and high-speed switching has been demonstrated using a multisection grating-assisted coupler sampled reflector laser. A high-output extinction ratio (>20 dBm) over 30-nm range was observed. The 10-Gb/s data switched between different output wavelengths at 2.5-Gb/s rate transmitted 50 km of dispersion-shifted fiber with small measured power penalty (<2 dB).

A very noticeable increase in the beaver population (mainly Eurasian (Castor fiber L.)) East European Plain since end of 20th century through reintroduction contributed to emergence a large number dams and ponds, which resulted transformation channels hydrological regime small rivers. In this paper, for first time Middle Volga region, regularities distribution ponds on rivers were revealed based topographic survey river channel, regulated by activity recent decades. The materials paper...

The present study is devoted to the classical problem on stability of a magnetic fluid layer under influence gravity and uniform field. A periodical peak‐shaped stable structure formed surface when applied field exceeds critical value. mathematical model describes single peak in pattern assuming axial symmetry shape. configuration whole space, particle concentration inside free are unknown quantities this model. treated explicitly, using parametric representation with respect arc length....

A simple wet chemical etch which produces stable and oxide-free surfaces of ZnSe is described. The etchant, a low pH solution H2SO4:H2O2:H2O, reacts with producing an amorphous layer Se grows into the semiconductor. then dissolved in aqueous (NH4)2S resulting S-passivated surface. volatile can be desorbed by heating sample to 300 °C. efficacy this process demonstrated formation 20 nm wide quantum wires CdZnSe/ZnSe good optical properties.

Abstract A numerical solution strategy for calculating equilibrium free surfaces of a ferrofluid drop under the action uniform magnetic fields is proposed. Based on this strategy, shapes nonlinear magnetisable fluids are obtained numerically in wide range field intensities and compared with existing theoretical results. (© 2005 WILEY‐VCH Verlag GmbH &amp; Co. KGaA, Weinheim)

In this paper, we present the design and manufacturing of next-generation 850 nm 10 Gb/s vertical-cavity surface-emitting lasers (GenX VCSELs). They were developed to provide a solution that meets Class-1 eye safety limits, IEEE 802.3ae standards, 10G Fiber Channel corresponding multisource agreement requirements for emerging low-cost, high-volume, high-performance data communication applications in local storage area networks (LANs SANs). The paper covers GenX device designs, processes, DC...

In this paper we report the results from on-going performance enhancements of Emcore's comprehensive line data communication VCSEL products in cost effective hermetic TO packages. Data are presented on -20 to 100°C temperature range operational characteristics our offerings at 1.25, 2.5, 4, and 10 Gb/s. The discussion covers high-speed parameters, fiber coupling efficiency, other important features packaged devices.

The first accelerated aging study of wavelength tunable packaged sampled grating reflector (GCSR) lasers is reported. Stable power and SMSR were observed during the 5000 hours operation at elevated temperatures. Frequency shifts selected lasing channels characterized to access potential failures in an optical network. A longer burn-in was found significantly reduce amount shifts, hence increase reliability device. effective room-temperature lifetime GCSR estimated be 13.4 y. new end-of-life...

ZnCdSe/ZnSe quantum well wires (QWWs) of various lateral size down to 30 nm were fabricated using a combination reactive ion etching (RIE) and subsequent new type wet chemical treatment, followed by epitaxial overgrowth. The processing does not lead any additional inhomogeneous broadening the QWW photoluminescence (PL) lines, blue shifted due confinement, PL efficiency exhibits no dramatic reduction with decreasing wire width.

Multiple increase in the beaver population on East European Plain has led to appearance of a large number dams and ponds small rivers. At present, problem regulating rivers this region remains poorly studied due above circumstances. This study presents results comparison modern geodetic methods obtained using an electronic total station, GNSS equipment UAVs. The river Morkvashinka, flowing along northern tip Volga Upland, was chosen as object study. spatial coordinates altitudes measured by...

Shielding properties of a cylindrical thick-walled ferrofluid layer that protects against externally applied uniform magnetic fields are numerically investigated. We take into account the diffusion nanoparticles in with dipole-dipole, steric and hydrodynamic interactions between particles. Permeability is considered to be dependent on magnetic-field strength particle concentration. A combined method finite differences boundary elements solve nonlinear transmission problem magnetostatics...