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Flipping optical wavefront eliminates distortions in multimode fibers

E-Mail IMAGE: When a well-defined image propagates from the right-hand side to the left-hand side through a 1-km-long multimode fiber, its spatial profile and polarization will be strongly distorted. By flipping the. view more Credit: Illustration by Yiyu Zhou The use of multimode optical fibers to boost the information capacity of the Internet is severely hampered by distortions that occur during the transmission of images because of a phenomenon called modal crosstalk. However, University of Rochester researchers at the Institute of Optics have devised a novel technique, described in a paper in Nature Communications, to flip the optical wavefront of an image for both polarizations simultaneously, so that it can be transmitted through a multimode fiber without distortion. Researchers at the University of South Florida and at the University of Southern California collaborated on the project.

Alan willnerRunzhou zhangAlexander fyffeBoris bravermanLos angelesRobert boydBoyd rochesterZhimin shiJiapeng zhaoYiyu zhouNature communicationsUniversity of south floridaResearch office of theEngineering research council of canadaUniversity of southern californiaNatural sciences

Tulane part of Navy/Army-funded research on improving communication

A team of Louisiana researchers, including a group from the Tulane University School of Science and Engineering, has developed a smart quantum technology that could have real-world applications to quantum networks and future quantum communications systems used in the military. Ryan Glasser, an associate professor of physics at Tulane, and his team in the Department of Physics, collaborated on the study with researchers from Louisiana State University. The study was featured on the cover of the March 2021 issue of “Recent developments in optical technologies have resulted in extremely high information transfer rates using the spatial properties of light i.e. images (and more complex structured beams),” Glasser said. “However, a difficulty in such communications using light through free-space is that turbulence can severely distort the beams, resulting in errors in the communication.”

United statesCheng longErinm knutsonJoshua fabrePengcheng zhaoNarayan bhusalMingyuan hongSanjaya lohaniOmars magana loaizaRyan glasserSantanu dasQingdao university of scienceSanta clara universityTulane school of scienceLouisiana quantum initiativeLouisiana state university

Dangerous Heat Bombs Have Been Entering The Arctic Ocean, Expedition Reveals

Dangerous Heat Bombs Have Been Entering The Arctic Ocean, Expedition Reveals 30 APRIL 2021 For decades, warmer waters seeping into the Arctic Ocean have increasingly threatened Arctic sea ice, with scientists predicting the ice pack could disappear entirely in summers from the middle of the next decade. Researchers have now uncovered one of the mechanisms driving this catastrophe, identifying how heat bombs of warm, salty water from the Pacific Ocean flow into the frigid Arctic Ocean, heating the ice above from underneath for months or even years. The rate of accelerating sea ice melt in the Arctic has been hard to predict accurately, in part because of all of the complex local feedbacks between ice, ocean, and atmosphere, says physical oceanographer Jennifer MacKinnon from the Scripps Institution of Oceanography at UC San Diego.

United statesBering straitJennifer mackinnonArctic oceanPacific oceanNature communicationsScripps institution of oceanographyUs office of naval researchScripps institutionStratified ocean dynamicsBeaufort gyreSusan nguyenPacific summer waterஒன்றுபட்டது மாநிலங்களில்பெரிங் சங்கடமானஜெனிபர் மெக்கின்னான்

Defence Technology Intelligence Summary

Defence Technology Intelligence Summary
janes.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from janes.com Daily Mail and Mail on Sunday newspapers.

United kingdomUnited statesMax winkelmannJustin nerodaJeffrey trusslerArmy research laboratorySoldier technologyIndia ministry of defence moIndia defence researchUs army research officeUniversity hydrogen properties for energy research hyBooz allen hamiltonUs armyNational people congressUs navyFrance naval group

A safer way to deploy bacteria as environmental sensors

A safer way to deploy bacteria as environmental sensors
scienceblog.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from scienceblog.com Daily Mail and Mail on Sunday newspapers.

Farren isaacsAbdul latif jameelHyunwoo yukTzu chieh tangXinyue liuTimothy luXuanhe zhaoAlexis rovnerKevin yehlYale school of medicineNational institutes of healthHarvard medical schoolNational science foundationInstitute for soldier nanotechnologiesDefense advanced research projects agencyUniversity of pennsylvania