Results 101 to 110 of about 8,550,579 (301)

Optimisation of DSF and SOA based phase conjugators by incorporating noise-suppressing fibre gratings

, 1997
We compare the performance of dispersion-shifted-fibre (DSF) and semiconductor-optical-amplifier (SOA) based phase conjugators for a 10 Gb/s non-return-to-zero system with respect to conversion efficiency, noise figure and distortion.
Laming, R.I., Reekie, L., Cole, M.J., Geiger, H., Set, S.Y., S.Y. Set, H. Geiger, R.I. Laming, L. Reekie, M.J. Cole   +9 more
core   +1 more source

Oxygen Evolution Electrocatalysts with Trinuclear, Mixed‐Valence Iron Motifs on Electronically Aligned Carbon Dots

Advanced Functional Materials, EarlyView.
Trinuclear iron oxo‐bridged catalytic ensembles stabilized by aspartic‐acid‐derived carbon dots provide an effective platform for alkaline oxygen evolution. Mixed‐valence charge balancing, inner‐sphere charge transport, and work‐function alignment within the N/O‐rich carbon framework promote cooperative Fe‐site chemistry and efficient OER ...
Megha A. Deshmukh, Giorgio Zoppellaro, Emiliano Fonda, Lukáš Zdražil, Shounik Paul, David Panáček, Hanuman Thorat, Zdeněk Badura, Michele Melchionna, Manuela Bevilacqua, Paolo Fornasiero, Klaus Müllen, Radek Zbořil, Aristides Bakandritsos   +13 more
wiley   +1 more source

Phase sensitive amplification enabled by coherent population trapping

New Journal of Physics, 2018
We isolate a novel four-wave mixing process, enabled by coherent population trapping (CPT), leading to efficient phase sensitive amplification. This process is permitted by the exploitation of two transitions starting from the same twofold degenerate ...
P Neveu, C Banerjee, J Lugani, F Bretenaker, E Brion, F Goldfarb   +5 more
doaj   +1 more source

Widely Tunable Fiber Optical Parametric Oscillators With Idler Removal Filter

IEEE Photonics Journal, 2017
The properties of the singly resonant and double-pass pump fiber optical parametric oscillators (FOPO) are experimentally investigated. An idler removal filter is utilized to eliminate the idler component in a Fabry–Pérot cavity to minimize
Kwok Shien Yeo, Muhammad Hafiz Abu Bakar, Faisal Rafiq Mahamd Adikan, Mohd Adzir Mahdi   +3 more
doaj   +1 more source

Eight-wave mixing parametrical amplification

, 2017
We investigate parametrically amplified eight-wave mixing (PA-EWM). The double dressed PA-four-wave mixing (PA-FWM) is the superposition of one PA-FWM process, two different PA-six-wave mixing (PA-SWM) processes (PA-SWM1 and PA-SWM2 with external ...
Liu, Yize, Li, Kangkang, Gaoguo Yang, Zhang, Yanpeng, Yize Liu, Yanpeng Zhang, Liu, Yang, Yang Liu, Kangkang Li, Wang, Kun, Kun Wang, Yang, Gaoguo   +11 more
core   +1 more source

Unexpected Asymmetric Mn‐Sb Site Mixing and Reentrant Spin‐Glass State of MnSb2Te4

Advanced Functional Materials, EarlyView.
MnSb2Te4 is an intrinsic magnetic topological insulator. Its properties are extraordinarily sensitive to tiny defects, making structural studies essential for understanding how magnetism and topology work together. This work shows that Mn can be unevenly distributed within the crystal and how that disorder is linked to a newly reported spin‐glass state
Gustavo Chavez Ponce de Leon, Ahmad Dibajeh, Gert ten Brink, Majid Ahmadi, Suyang Sun, Wei Zhang, Bart Jan Kooi, George Palasantzas   +7 more
wiley   +1 more source

Electromagnetically induced transparency and four-wave mixing in a cold atomic ensemble with large optical depth

New Journal of Physics, 2014
We report on the delay of optical pulses using electromagnetically induced transparency (EIT) in an ensemble of cold atoms with an optical depth exceeding 500.
J Geng, G T Campbell, J Bernu, D B Higginbottom, B M Sparkes, S M Assad, W P Zhang, N P Robins, P K Lam, B C Buchler   +9 more
doaj   +1 more source

Emergence of a Hexagonal Fe2S2 Single Layer Without a Bulk Counterpart via Phase Transformation

Advanced Functional Materials, EarlyView.
Upon annealing, single‐layer Mackinawite iron sulfide transforms into a previously unknown hexagonal Fe2S2${\rm Fe}_2{\rm S}_2$ phase with β$\beta$‐CuI structure. STM, LEED, and first‐principles calculations identify the structure and show that electronic correlations and magnetic order are important for its stability.
Affan Safeer, Wejdan Beida, Felix Oberbauer, Nicolae Atodiresei, Gustav Bihlmayer, Max Wolfertz, Chiara Schlichte, Wouter Jolie, Stefan Blügel, Jeison Fischer, Thomas Michely   +10 more
wiley   +1 more source

A solid one-dimensional microstructured optical fiber with high nonlinearity and low dispersion at 1.55 microns

, 2009
We report on the fabrication of a solid one-dimensional microstructured fiber with high nonlinearity and low dispersion at 1.55µm. A four-wave-mixing based tunable wavelength-conversion scheme was experimentally demonstrated in just 1.5m of this ...
Camerlingo, A., Horak, P., Petropoulos, P., Parmigiani, F., Richardson, D.J., Poletti, F., Loh, W.H., Feng, X.   +7 more
core   +1 more source

Cascaded four-wave mixing in liquid-core optical fibers

APL Photonics
Ultrafast nonlinear interactions in optical fibers are commonly employed for generating light with tailored properties, with four-wave mixing (FWM) being a widely used mechanism.
Saher Junaid, Johannes Hofmann, Mario Chemnitz, Markus Blothe, Frank Setzpfandt, Stefan Nolte, Markus A. Schmidt   +6 more
doaj   +1 more source