Results 111 to 120 of about 1,780,396 (352)

Static thermo-optic instability in double-pass fiber amplifiers.

Optics Express, 2016
A coupled-mode formalism, earlier used to describe transverse mode instabilities in single-pass optical fiber amplifiers is extended to the case of double-pass amplifiers.
J. Lægsgaard
semanticscholar   +1 more source

Unraveling the Electronic Structure of Silicon Vacancy Centers in 4H‐SiC

Advanced Functional Materials, EarlyView.
The electronic structure of the silicon vacancy in 4H‐SiC is probed via transient absorption spectroscopy, uncovering previously inaccessible excited states of the quartet and doublet spin channels, including the V2' transition. In combination with theoretical analysis, a comprehensive picture of the electronic structure is established.
Ali Tayefeh Younesi, Minh Tuan Luu, Christopher Linderälv, Vytautas Žalandauskas, Marianne Etzelmüller Bathen, Nguyen Tien Son, Takeshi Ohshima, Gergő Thiering, Lukas Razinkovas, Ronald Ulbricht   +9 more
wiley   +1 more source

A $1 \times N$ Lossless Adaptive Optical Power Splitter Employing an Opto-VLSI Processor

IEEE Photonics Journal, 2013
We propose and demonstrate the concept of a novel 1 × N lossless adaptive optical power splitter (OPS) structure integrating a software-driven Opto-VLSI processor, optical amplifiers, and an array of 4-f imaging systems.
Haithem A. B. Mustafa, Feng Xiao, Kamal Alameh   +2 more
doaj   +1 more source

Blood Biomarkers and Surface‐Enhanced Raman Spectroscopy for Gout: A Comprehensive Review

Advanced Functional Materials, EarlyView.
Schematic illustrating gout disease progression from asymptomatic hyperuricemia to chronic tophaceous disease, highlighting the limitations of conventional imaging and biochemical diagnostics and the potential of engineered SERS platforms for ultrasensitive blood‐based detection of urate‐related biomarkers across disease stages, with the color gradient
Isuri Perera, Chiranjeevi Kanike, Appurva Tiwari, Hongyan Wu, Larry D. Unsworth, Ben Bin Xu, Xuehua Zhang   +6 more
wiley   +1 more source

Multi-kilowatt diffractive coherent combining of pseudorandom-modulated fiber amplifiers

, 2016
. We report efficient coherent beam combining of five kW-class fiber amplifiers seeded with pseudorandom phase-modulated light, using a 1×5 diffractive optical element (DOE).
A. Flores, I. Dajani, R. Holten, T. Ehrenreich, B. Anderson   +4 more
semanticscholar   +1 more source

Comparison of phase modulation schemes for coherently combined fiber amplifiers.

Optics Express, 2015
Optical linewidth broadening through both white noise (WNS) and pseudo-random binary sequence (PBRS) phase modulation are effective techniques for suppressing stimulated Brillouin scattering (SBS) in high- power fiber amplifiers.
B. Anderson, A. Flores, R. Holten, I. Dajani   +3 more
semanticscholar   +1 more source

Field-trial of an all-optical PSK regenerator/multicaster in a 40 Gbit/s, 38 channel DWDM transmission experiment [PDF]

, 2012
The performance of future ultra-long haul communication systems exploiting phase-encoded signals is likely to be compromised by noise generated during signal transmission.
Joseph Kakande, Josef Vojtech, David J. Richardson, Bogris, Adonis, Slavík, Radan, Vojtěch, Josef, Phelan, Richard, Richardson, David J., Lars Gruner-Nielsen, Kakande, Joseph, Francesca Parmigiani, Richard Phelan, Dimitris Syvridis, Parmigiani, Francesca, Periklis Petropoulos, Grüner-Nielsen, Lars, Syvridis, Dimitris, Petropoulos, Periklis, Adonis Bogris, Radan Slavik   +19 more
core   +1 more source

A Dual‐Functional Electrolyte Additive for Highly Reversible Zinc‐Ion Batteries

Advanced Functional Materials, EarlyView.
This study introduces tetrabutylammonium bromide (TBAB) as a dual‐function additive for aqueous zinc‐ion batteries. TBAB disrupts the hydrogen‐bond network of water while TBA+ adsorbs on Zn to improve interfacial wettability and regulate Zn2+ flux, resulting in suppressed dendrite growth and parasitic reactions. This synergy extended the lifespan of Zn|
Shirui Zhang, Shixun Wang, Jianen Zhang, Jun Liu, Jinfeng Xie, Wentao Tang, Li Guan, He Huang, Qi Xue, Chunyi Zhi   +9 more
wiley   +1 more source

Trace Sulfur‐Doping Boosts NiCo Heterostructured Catalyst for Selective Glycerol‐to‐Formic Acid Electroreforming

Advanced Functional Materials, EarlyView.
A sulfur‐doped Ni–Co heterostructured catalyst is rationally designed to regulate interfacial electronic and adsorption properties for selective glycerol electrooxidation. The synergistic Ni–Co active sites promote hydroxide activation and glycerol adsorption, enabling efficient formic acid production and durable hydrogen generation under continuous ...
Lingqin Shen, Jianchuan Jin, Auttaphon Chachvalvutikul, Ouardia Akdim, Graham J. Hutchings   +4 more
wiley   +1 more source

High average power, high energy, femto-second fiber chirped pulse amplification system [PDF]

, 2007
We have demonstrated an Yb-fiber laser system incorporating a CFBG stretcher, bandwidth optimised amplifiers and dielectric grating compressor. The system produced 135 W average power with pulse energy of 13.5 µJ.
M. Ibsen, Dawson, J.W., Ibsen, M., Piper, A., Richardson, D.J., Malinowski, A., C. P. J. Barty, A. Piper, C. W. Siders, J. A. Britten, Siders, C.W., Barty, C.P.J., J. W. Dawson, Price, J.H.V., J. H. V. Price, D. J. Richardson, He, F., F. He, A. Malinowski, Britten, J.A.   +19 more
core   +1 more source