Results 51 to 60 of about 14,944 (303)

Nanoindentation Criteria for Combinatorial Thin Film Libraries

Advanced Engineering Materials, EarlyView.
Thin‐film material libraries are compositional spreads used for screening composition‐structure‐property relationships. Nanoindentation is often used to characterize mechanical behavior across these systems, however variations in methodology are widespread.
Andre Bohn, Adie Alwen, Andrea M. Hodge
wiley   +1 more source

Broadband Monolithic GaN Balanced Amplifier Composed of Mixed Cascade-Tandem Directional Couplers and Cascode Stages

IEEE Access, 2023
In this paper we present a broadband monolithic balanced amplifier reaching 30 dBm output power over a range from 5.7 GHz up to 35.1 GHz. To the best of our knowledge, such broad operational bandwidth has never been reported in literature for balanced ...
Robert Smolarz, Kamil Staszek, Slawomir Gruszczynski, Krzysztof Wincza   +3 more
doaj   +1 more source

Theory of cw Raman oscillation in optical fibers [PDF]

, 1979
A theory for Raman fiber laser oscillators is presented. The Stokes output and the residual pump power are shown to be calculable from a knowledge of the input pump power and the fiber characteristics. The evolution of the pump and the Stokes waves along
AuYeung, John, Yariv, Amnon
core   +1 more source

Compact High-Directivity Contra-Directional Coupler

Electronics, 2022
This paper presents a novel design of a compact contra-directional coupler with high directivity for high-power monitoring in high frequency. Microstrip parallel coupled lines are widely used for directional couplers; however, they show poor directivity inherently. Their directivity has been improved by many works.
Won Il Chang, Mahn Jea Chung, Chul Soon Park   +2 more
openaire   +1 more source

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

Design of GaSb-based monolithic passive photonic devices at wavelengths above 2 µm

JPhys Photonics, 2023
In this paper, we report, for the first time, a theoretical study on passive photonic devices including optical power splitters/combiners and grating couplers (GCs) operating at non-telecom wavelengths above 2 µ m in a monolithic GaSb platform.
Md Saiful Islam Sumon, Shrivatch Sankar, Weicheng You, Imad I Faruque, Sarvagya Dwivedi, Shamsul Arafin   +5 more
doaj   +1 more source

4-by-4 Integrated Waveguide Coupler Based on Bi-Directional Propagation in Two Single-Mode Waveguides

IEEE Photonics Journal, 2021
We propose and investigate theoretically the use of bi-directional propagation of light in silica integrated coupled waveguide structures for linear optical processing of fiber-coupled photons.
Mathias J. Weisen, James C. Gates, Corin B. E. Gawith, Peter G. R. Smith, Peter Horak   +4 more
doaj   +1 more source

Near-infrared Hong-Ou-Mandel interference on a silicon quantum photonic circuit [PDF]

, 2012
Near-infrared Hong-Ou-Mandel quantum interference is observed in silicon nanophotonic directional couplers with raw visibilities on-chip at 90.5%. Spectrally-bright 1557-nm two-photon states are generated in a periodically-poled KTiOPO4 waveguide chip ...
Englund, Dirk R., Kocaman, Serdar, Kwong, Dim-Lee, Liang, Junlin, Lo, Guo-Qiang, Wong, Chee Wei, Wong, Franco N. C., Xie, Zhenda, Xu, Xinan, Yu, Mingbin, Zheng, Jiangjun, Zhong, Tian   +11 more
core   +2 more sources

Rafting of Ni‐Based Superalloys Under Multiaxial Load as Understood by Phase‐Field Simulations and Critical Experiments

Advanced Engineering Materials, EarlyView.
Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan, David Bürger, Gunther Eggeler, Oleg Shchyglo, Ingo Steinbach, Muhammad Adil Ali   +5 more
wiley   +1 more source

A photonic integrated chip for distinguishing the optical wave packets based on a neural-network

Results in Physics
In this work, we use an optical-neural network to recognize a series of optical triangular and square wave packets. This chip is designed based on the reservoir computing, consisting of the directional couplers, phase shifters, Mach-Zehnder modulators ...
Chu-En Lin, Ya-Fan Chen, Ching-Pao Sun, Chii-Chang Chen   +3 more
doaj   +1 more source