More than 1000 optical frequency channels are generated with 12.5 GHz spacing from a single supercontinuum source. 600–700 for the wavelength range 1512–1580 nm confirmed to offer SNRs and Q factors sufficient multi-span 2.5 Gbit/s DWDM transmission.

We have developed an NxN cyclic-frequency router with improved performance by employing two types of modified configuration; a uniform-loss and (ULCF) arrayed-waveguide grating (AWG) interconnected multiple AWG. demonstrated compact 50-GHz-spacing 64x64 ULCF-AWG low uniform insertion losses 5.4-6.8 dB frequency deviations from the grid less than plusmn8 GHz. also 100-GHz-spacing 8x8 multiple-AWG practical configuration, very 2.3-3.4 dB, plusmn6 discuss suitable or realizable scale N routers...

A low-loss flat-top interleave filter with 200 GHz channel spacing is fabricated using planar lightwave circuit (PLC) technology. The interleaver has a two-stage lattice structure and demonstrates an insertion loss of 0.9 dB 1 bandwidth 140 GHz.

The local structure of cerium in two systematic compositional series glasses, nominally CeP3O9–AlP3O9 and CeP3O9–SiP2O7, was interrogated using X-ray photoelectron spectroscopy (XPS) absorption fine (XAFS) spectroscopy. XPS revealed that, for glasses melted air, ≥95% ions are Ce3+. This independently confirmed near edge (XANES). Ce K-edge extended (EXAFS) has been used to determine the Near metaphosphate composition, found have an average coordination number ~7.0 cerium-oxygen bond length...

This paper describes a compact and practical interleave filter with uniform multi/demultiplexing properties wide operational wavelength range realized by using lattice-form structure silica-based waveguide. In the design, we optimized bandwidth controlling lattice stage number loss ripple in spectrum. Moreover, propose novel coupler large fabrication tolerance, new tandem configuration that provides characteristics low dispersion, polarization dependence compensation method, folded...

We present a full description of the design and fabrication compact laterally tapered spotsize converter (SSC) that provides both low-loss coupling large tolerances. The SSC is based on waveguide with narrow core width can be fabricated simply by using usual process. discuss concept in detail provide simple procedure which to obtain optimum parameters. also investigate fiber misalignment tolerance mode field diameter confirm it suitable for integration large-scale optical devices....

We describe a compact 1.5%-/spl Delta/ athermal silica-based 100-GHz-spacing 16-channel arrayed-waveguide grating (AWG) multi/demultiplexer with modified groove design for very low excess loss. propose new approaches modifying the shape of grooves and arrayed waveguides optimize modifications waveguides. By employing this design, we greatly reduced loss from 1.9 to 0.4 dB in AWG.

Cd1–xZnxS (CdZnS) is a promising replacement for the CdS buffer layers in copper indium gallium (di)selenide (CIGS) solar cells because wider band gap of CdZnS offers improved optical transmittance blue light. Chemical bath deposition (CBD) state-of-the-art method and CdZnS. However, CBD poorly understood, relationships between composition stoichiometry, microstructure, optoelectronic properties deposited film are lacking. We introduce using continuous flow microreactor as new technique to...

A large-scale arrayed-waveguide grating with a 400-channel and 25 GHz spacing using 1.5%-Δ silica-based waveguides on 6-inch Si wafer has been realised. Good demultiplexing properties have obtained over the full C- L-band range an on-chip loss of 3.8 to 6.4 dB far-end crosstalk –30 dB.

We investigate the correlation between atomic structures of amorphous zinc-tin-oxide (a-ZTO) thin films grown by layer deposition (ALD) and their electronic transport properties. perform synchrotron-based X-ray absorption spectroscopy at K-edges Zn Sn with varying [Zn]/[Sn] compositions in a-ZTO films. In extended fine structure (EXAFS) measurements, signal attenuation from higher-order shells confirms Both quantitative EXAFS modeling near edge (XANES) reveal that structural disorder around...

Defective VFe₂O_x aerogels are synthesized to maximize cation vacancies that increase Li⁺- and Na⁺-insertion capacity.

The first transmission experiment employing a high SNR supercontinuum multi-carrier source is presented. A 106 × 10 Gbit/s, 25 GHz spaced DWDM signal has been transmitted over 640 km (8 80 km).

A compact arrayed-waveguide grating based 64×64 router module with uniform loss and cyclic-frequency performance has been developed using a silica-based planar lightwave circuit. The circuit was miniaturised sufficiently for integration on 4-inch substrate high-contrast 1.5%-Δ waveguides. low insertion of 5.4 to 6.8 dB achieved as result reducing the at intersecting waveguides by employing horizontally enlarged core.

The local atomic environment of lead (Pb) adsorbed to a CH3(CH2)19COOH Langmuir monolayer was investigated in situ using grazing-incidence X-ray absorption fine structure (GI-XAFS) spectroscopy at the Pb LIII edge. Measurements were performed pH 6.5 10-5 M PbCl2 solution subphase, condition under which grazing incidence diffraction (GID) revealed large-area commensurate superstructure underneath close-packed organic monolayer. XAFS results indicate covalent binding cations carboxyl...

Si surface cleaning prior to growth and successive epitaxial of on were carried out at low temperatures by ECR plasma‐excited MBE. The oxide was removed quite effectively hydrogen plasma exposure even as 400°C. epitaxially grown 400°C using metallic Ga. At 500°C above, single‐domain double‐domain without a two‐step method. A SIMS profile revealed that no pile‐up either carbon or oxygen the hetero‐interface treated 630°C, which indicates much cleaner interface in comparison with typical...

We demonstrate a high-speed optical switch based on generalized Mach-Zehnder interferometer with hybrid configuration consisting of silica-based planar lightwave circuit and lithium niobate phase shifters. The novel demonstrated here has one input four output ports switching time less than 0.1 mus, thanks to the fast response electrooptic shifters LN chip. insertion loss extinction ratio are 4.2 dB more 17 dB, respectively

Abstract Structure of metallic glasses fascinates as the generic amorphous structural template for ubiquitous systems. Its specification necessitates determination complete hierarchical structure, starting from short-range-order (SRO) → medium-range-order (MRO) bulk structure and free volume (FV) distribution. This link has largely remained elusive since previous investigations adopted one-technique-at-a-time approach, focusing on limited aspects any one domain. Reconstruction experimental...

A low coupling loss of 0.5 dB/point between 1.5%-Δ silica-based waveguides and a singlemode fibre has been achieved by employing simple laterally tapered waveguide with narrow core width. By applying this structure to an arrayed grating multiplexer, the insertion was decreased from 4.9 2.6 dB.

A planar lightwave circuit-based encoder/decoder for time-spreading/wavelength-hopping optical code division multiple access (CDMA) that consists of an arrayed-waveguide grating and variable delay lines is proposed. Its flexible assignment operation auto-/cross-correlations at 10 Gbit/s confirmed.

This paper presents a 43-Gb/s clock and data recovery (CDR) optoelectronic integrated circuit (OEIC) that consists of 43-GHz heterojunction phototransistor (HPT) oscillator as an 40-Gb/s-class bipolar transistor (HBT) decision circuit. The layer fabrication process the HPT HBT are fully compatible, has photocoupling window in emitter electrode for optical access from top. When is directly illuminated, successfully extracts electrical signal stream by itself. OEIC regenerates input into using...

We report the observation of an alloy phase with fluorite-type structure containing Ni, Fe, Cu, and Si, found as precipitates in multicrystalline silicon. The analysis extended x-ray absorption fine-structure microspectroscopy ($\ensuremath{\mu}$-EXAFS) measurements on $K$ edges transition metals a synthetic reference material composition ${\mathrm{Ni}}_{0.82}{\mathrm{Fe}}_{0.21}{\mathrm{Cu}}_{0.02}{\mathrm{Si}}_{1.94}$ support model similar to $\mathrm{Ni}{\mathrm{Si}}_{2}$ but mixed...

We realized a 400-channel 25-GHz spacing arrayed-waveguide (AWG) on 6-inch Si wafer using 1.5%-/spl Delta/ silica-based waveguides. This AWG covers the full C- and L-bands exhibits an on-chip loss of 3.8-6.4 dB.

This paper proposes a cascade-connected arrayed-waveguide grating (AWG) as solution to the problem of crosstalk accumulation in large-scale AWG multiplexer/demultiplexer (MUX/DEMUX) and demonstrates 64-channel cascaded module with very low background less than -80 dB total about -34 dB. In this paper, authors densely integrate 64 additional compactly designed crosstalk-suppressing AWGs whose bandwidths were carefully optimized directly attach them conventional AWG. Consequently, addition...

We study the magnetic transition in ${\text{SrRuO}}_{3}$, only itinerant $4d$ ferromagnet, employing x-ray absorption fine structure and state-of-the-art band-structure calculations. Both experimental theoretical results reveal an unusual evolution of local structural parameters around spectator element, Sr, across transition. Interestingly, such Sr-related bonds nucleate at a temperature, ${T}^{\ensuremath{\star}}$, higher than indicating presence precursor effect. Contrary to common...