Results 51 to 60 of about 631,512 (303)

Large mode area waveguide based high-energy passively Q-switched laser in silicon photonics [PDF]

EPJ Web of Conferences
We demonstrate high energy Q-switched pulse generation with the help of a large mode area gain waveguide in a silicon photonics device. Output pulse energy >150 nJ and laser slope efficiency of 40% is shown.
Singh Neetesh, Lorenzen Jan, Sinobad Milan, Wang Kai, Liapis Andreas C., Frankis Henry, Gaafar Mahmoud A., Haugg Stefanie, Francis Henry, Carreira Jose, Geiselmann Michael, Herr Tobias, Bradley Jonathan, Sun Zhipei, Garcia-Blanco Sonia M., Kartner Franz X.   +15 more
doaj   +1 more source

High average power, widely tunable femtosecond laser source from red to mid-infrared based on an Yb-fiber-laser-pumped optical parametric oscillator [PDF]

, 2013
We report on the highly efficient generation of widely tunable femtosecond pulses based on intracavity second harmonic generation (SHG) and sum frequency generation (SFG) in a MgO-doped periodically poled LiNbO3 optical parametric oscillator (OPO), which
Fan, Jintao, Gu, Chenglin, Hu, Minglie, Reid, Derryck Telford, Song, Youjian, Wang, Chingyue, Zhang, Limeng   +6 more
core   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

High-Order Modes Suppression in All-Glass Large-Mode Area Rare-Earth Doped Optical Fibers with Modified Cladding

Photonics, 2022
In the present work we have developed and realized a high core-to-cladding diameters ratio active optical fibers operated in a single-mode regime due to specially designed structure containing boron-doped and fluorine-doped rods.
Svetlana S. Aleshkina, Maxim M. Khudyakov, Tatiana A. Kashaykina, Mikhail V. Yashkov, Mikhail Yu. Salganskii, Vladimir V. Velmiskin, Mikhail M. Bubnov, Mikhail E. Likhachev   +7 more
doaj   +1 more source

Large-mode-area fibers operating near single-mode regime

Optics Express, 2016
Lower NA in large-mode-area fibers enables better single-mode operation and larger core diameters. Fiber NA has traditionally been limited to 0.06, mostly due to the control tolerance in the fabrication process. It has been recognized recently that transverse mode instability is a major limit to average power scaling in fiber lasers.
Fanting, Kong, Christopher, Dunn, Joshua, Parsons, Monica T, Kalichevsky-Dong, Thomas W, Hawkins, Maxwell, Jones, Liang, Dong   +6 more
openaire   +2 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Low-DMGD, Large-Effective-Area and Low-Bending-Loss 12-LP-Mode Fiber for Mode-Division-Multiplexing

IEEE Photonics Journal, 2019
We report the design of 12-LP-mode (21-spatial-mode) fiber with a low differential mode group delay (DMGD), a large effective area, and a low bending loss that is adapted to a mode-division-multiplexing system over the C+L band.
Huan Zhang, Jian Zhao, Zhiqun Yang, Guanju Peng, Zixiang Di   +4 more
doaj   +1 more source

Fabrication and Performance of a Heterogeneous-Helical-Cladding Fiber

IEEE Photonics Journal, 2021
Large mode area (LMA) fibers are widely used in high power fiber lasers to solve the nonlinear problems. In this work, a Nd3+-doped phosphate glass LMA fiber with heterogeneous helical claddings (HHC) is fabricated successfully by rod in tube ...
Xiao Shen, Zijun Yang, Sheng Chen, Guangli Yang, Liaolin Zhang, Wei Wei   +5 more
doaj   +1 more source

Hybrid Ytterbium-doped large-mode-area photonic crystal fiber amplifier for long wavelengths. [PDF]

, 2012
A large-mode-area Ytterbium-doped photonic crystal fiber amplifier with build-in gain shaping is presented. The fiber cladding consists of a hexagonal lattice of air holes, where three rows are replaced with circular high-index inclusions.
Alkeskjold, Argyros, Boyer, Cerqueira S, Cucinotta, Enrico Coscelli, Federica Poli, Goto, Jansen, Jes Broeng, Jesper Lægsgaard, Limpert, Marko Laurila, Mette M. Jørgensen, Nicholson, Saito, Shirakawa, Sidsel R. Petersen, Thomas T. Alkeskjold, Wielandy   +19 more
core   +2 more sources

Anisotropic tapered polarization-maintaining large mode area optical fibers

Optics Express, 2017
We demonstrate a novel type of tapered large mode area polarization-maintaining fiber. These birefringent fibers have an elliptical inner cladding and a core diameter that increases adiabatically from 8 µm to 70 µm. The polarization maintaining ability of the fiber samples was investigated by measuring the spatial distribution of polarization beat ...
Ustimchik, V. E., Rissanen, J., Popov, S. M., Chamorovskii, Y. K., Nikitov, S. A.   +4 more
openaire   +4 more sources