Results 51 to 60 of about 527,555 (282)

Nd:YVO₄ Random Laser with Preferential Emission at 1340 nm over 1064 nm

Photonics
Neodymium-doped yttrium vanadate random lasers have presented exceptional efficiency and output power at the 1064 nm emission wavelength. However, emission at 1340 nm has not yet been observed for these random lasers, even though regular bulk lasers have
Jessica Dipold, Luciana R. P. Kassab, Niklaus U. Wetter   +2 more
doaj   +1 more source

Threshold of a random laser based on Raman gain in cold atoms

, 2009
We address the problem of achieving a random laser with a cloud of cold atoms, in which gain and scattering are provided by the same atoms. In this system, the elastic scattering cross-section is related to the complex atomic polarizability.
Bali, Brzozowski, Burin, Cao, Cao, Cao, Chen, Conti, Davide Brivio, dePue, Drozdowicz, Fioretti, Froufe-Pérez, Gao, Gouedard, Grison, Grynberg, Guerin, Hilico, Jurczak, Ketterle, Labeyrie, Lagendijk, Letokhov, Martorell, Mollow, Mollow, Nicolas Mercadier, Noginov, Robin Kaiser, Strangi, Tabosa, Türeci, van Rossum, Vanneste, Westbrook, Wiersma, Wiersma, Wiersma, William Guerin   +39 more
core   +1 more source

Coherent instabilities in random lasers [PDF]

Physical Review A, 2011
A numerical study is presented of random lasers as a function of the pumping rate above the threshold for lasing. Depending on the leakiness of the system resonances, which is typically larger in random lasers compared to conventional lasers, we observe that the stationary lasing regime becomes unstable above a second threshold.
Andreasen, Jonathan, Sebbah, Patrick, Vanneste, Christian   +2 more
openaire   +2 more sources

Random Distributed Feedback Fiber Laser [PDF]

Optics and Photonics News, 2010
Peer ...
Turitsyn, S. K., Babin, S.A., El-Taher, A. E., Harper, Paul, Churkin, D. V., Kablukov, S. I., Ania Castañón, Juan Diego, Karalekas, Vasileios, Podivilov, E.V.   +8 more
openaire   +2 more sources

AAA+ protein unfoldases—the Moirai of the proteome

FEBS Letters, EarlyView.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source

Random Emission and Control of Whispering Gallery Mode Using Flexible Optical Fiber

Photonics
Axially uniform optical fibers provide a low-cost, scalable platform for the emission of whispering gallery mode (WGM) lasers. This paper proposes a method for generating and controlling WGM lasers based on the design of a flexible optical fiber array ...
Bingyang Cao, Zhen He, Weili Zhang
doaj   +1 more source

Experimental demonstration of 25 GHz wideband chaos in symmetric dual port EDFRL [PDF]

, 2017
We study dynamics of chaos in dual port erbium-doped fiber ring laser (EDFRL). The laser consists of two erbium-doped fibers, intracavity filters at 1549.30 nm, isolators, and couplers.
Jain, Ankita, Krishnamurthy, Pradeep Kumar, Landais, Pascal, Mirg, Shubham, Pandey, Akash   +4 more
core   +1 more source

Infrared laser sampling of low volumes combined with shotgun lipidomics reveals lipid markers in palatine tonsil carcinoma

Molecular Oncology, EarlyView.
Nanosecond infrared laser (NIRL) low‐volume sampling combined with shotgun lipidomics uncovers distinct lipidome alterations in oropharyngeal squamous cell carcinoma (OPSCC) of the palatine tonsil. Several lipid species consistently differentiate tumor from healthy tissue, highlighting their potential as diagnostic markers.
Leonard Kerkhoff, Manuela Moritz, Dennis Eggert, Anna Worthmann, Joerg Heeren, Henrike Zech, Till S. Clauditz, Waldemar Wilczak, Hartmut Schlüter, Christian S. Betz, Arne Böttcher, Jan Hahn   +11 more
wiley   +1 more source

Euclidean matrix theory of random lasing in a cloud of cold atoms

, 2011
We develop an ab initio analytic theory of random lasing in an ensemble of atoms that both scatter and amplify light. The theory applies all the way from low to high density of atoms.
A. Goetschy, Boyd R. W., Cao H., Cohen-Tannoudji C., Goetschy A. Skipetrov S. E., Guérin W., Haken H., Hakenbroich G., Letokhov V. S., S. E. Skipetrov, Savels T., Skipetrov S. E., Türeci H. E., Zaitsev O.   +13 more
core   +3 more sources

EDNRB‐dependent endothelin signaling reduces proliferation and promotes proneural‐to‐mesenchymal transition in gliomas

Molecular Oncology, EarlyView.
Glioma cells mainly express the endothelin receptor EDNRB, while EDNRA is restricted to a perivascular tumor subpopulation. Endothelin signaling reduces glioma cell proliferation while promoting migration and a proneural‐to‐mesenchymal transition associated with poor prognosis. This pathway activates Ca2+, K+, ERK, and STAT3 signalings and is regulated
Donovan Pineau, Leonor Garcia, Hugo Arnold, Antonija Hanžek, Maialen Arrieta, Laurent R Gauthier, Christine Granotier‐Beckers, François D Boussin, Amaury Herbet, Marie Hautière, Valentin Asei‐Ceschino, Clémentin Jacques, Laura Brard, Thomas Harnois, Valérie Coronas, Bruno Constantin, Aurélien Chatelier, Jean Chemin, Serge Urbach, Martial Seveno, Szimonetta Hideg, Chantal Ripoll, Kasandra Aguilar‐Cázarez, Min Zheng, Guo‐Hao Huang, Sheng‐Qing Lv, Lei Zhang, Philippe Rondard, Laurent Prezeau, Jean‐Philippe Pin, Hugues Duffau, Luc Bauchet, Valérie Rigau, Franck Denat, Charles Truillet, Didier Boquet, Jean‐Philippe Hugnot   +36 more
wiley   +1 more source