Tag

Optical Fiber

All articles tagged with #optical fiber

science21 days ago•7 min saved

Quantum Memory Link Stretches 420 Kilometers, Setting an Entanglement Distance Record

Physicists in China entangled two quantum memories separated by 420 kilometers of optical fiber, using rubidium atom clouds (Alice and Bob) and a middle node (Charlie). By converting photons to telecom wavelengths, stabilizing phases, and employing a single-photon interference scheme, they achieved matter-to-matter entanglement beyond the direct-transmission limit (PLOB bound), demonstrating a memory-based quantum network can outperform direct fiber links and marking a milestone toward long-range quantum networking, even as practical quantum internet remains a future goal.

via ScienceAlert|

#optical-fiber #plob-bound #quantum-entanglement

science1 month ago•55 min saved

Lab-made black hole made of light reveals Hawking radiation in a lab

Physicists created a tabletop black hole analogue by sending a strong pump pulse and a weaker probe through a photonic-crystal fiber, producing a moving horizon where Hawking radiation appears as ultraviolet photons and, for the first time, a measurable back-reaction on the source light. The observed glow matches Hawking’s thermal spectrum even in regimes where standard physics breaks down, providing a direct look at the Hawking mechanism and addressing the trans-Planckian issue. The team plans to push into the quantum regime to explore features like entanglement between Hawking partners and their missing counterparts.

via Yahoo|

#black-hole-analogue #hawking-radiation #optical-fiber

science1 month ago•135 min saved

Lab-made black hole from light tests Hawking radiation and its recoil

Physicists built a laboratory black hole analogue by launching a strong pump pulse through a photonic-crystal fiber, creating a moving optical front that forms an event horizon for a probe pulse. They detected Hawking-like ultraviolet radiation and, for the first time, observed the backreaction—a spectral shift indicating the analogue black hole paid a small energetic price for emitting the glow. The results align with Hawking’s predictions and suggest a direct one-step mechanism for Hawking radiation in this setup, with future work planned to explore quantum features such as entanglement.

via Live Science|

#black-hole-analogue #hawking-radiation #nonlinear-optics

science1 month ago•7 min saved

Lab Light Reveals Direct Hawking Backreaction in Black-Hole Analog

Physicists used ultrafast laser pulses in a patterned optical fiber to create a black-hole analog that emits Hawking radiation and, for the first time, observed backreaction: a tiny energy shift in the initiating pulse caused by the radiation. The study suggests a direct, biquadratic interaction mechanism, helping explain how Hawking radiation could arise in gravity, though real black holes remain unobservable. If the same mechanism appears in other analogs, it could inform the black hole information paradox.

via ScienceAlert|

#analog-experiments #backreaction #black-holes

technology1 year ago•4 min saved

Japan Sets New Internet Speed Record at 125,000 GBps, Outpacing US Tech

Japanese researchers set a new world record for internet speed at 125,000 GBps using a revolutionary optical fiber capable of transmitting data equivalent to 19 standard fibers, over a distance of 1,120 miles, potentially transforming global data infrastructure and high-speed communication.

via Rude Baguette|

#data-transmission #global-infrastructure #internet-speed-record

technology1 year ago•2 min saved

Japan Sets New Internet Speed Record with 1.02 Pbps

Researchers in Japan have set a new world record for internet speed, transmitting over 125,000 gigabytes per second over 1,120 miles using a novel optical fiber that significantly enhances long-distance data transmission, surpassing previous records and promising advancements in global communication infrastructure.

via Live Science|

#data-transmission #internet-speed-record #japan

technology2 years ago•2 min saved

Researchers Set New Data Transmission Speed Record at 402 Tbps

Researchers from Aston Institute of Photonic Research have set a new world record for data transmission speed at 402 terabits per second using standard optical fiber. This breakthrough, achieved by operating across six wavelength bands, could stabilize broadband costs amid rising demand and significantly enhance global communication infrastructure.

via SciTechDaily|

#broadband #data-transmission #optical-fiber

technology2 years ago•3 min saved

"Advancements in In-Space Glass Fabrication and Fiber Optic Research"

Flawless Photonics has successfully produced over 5 kilometers of ZBLAN optical fiber on the International Space Station, a feat that has eluded other companies attempting to manufacture fluoride glass in microgravity. This achievement has significant implications for energy savings and national security, as ZBLAN's improved transparency could revolutionize undersea communications cables. The European Space Agency and Luxembourg Space Agency funded Flawless Photonics' machine for drawing optical fiber in space, and NASA plans to study the quality and composition of the fibers upon their return to Earth in April. The company's next step is to manufacture preforms in space, leveraging microgravity to continue improving their products.

via SpaceNews|

#flawless-photonics #nasa #optical-fiber

technology3 years ago•3 min saved

"Thin Air Fiber: A Breakthrough in Optical Technology"

Researchers at the University of Maryland have demonstrated a continuously operating optical fiber made of thin air using auxiliary ultrashort laser pulses to sculpt fiber optic waveguides in the air itself. The air waveguide can be arbitrarily "unspooled" and directed at the speed of light in any direction, making it an exceptional candidate for directed energy. The waveguide method is straightforwardly scalable to 1 kilometer and longer, and the air waveguide is continuously maintained by heating and deepening the waveguide faster than the surrounding air can cool it, making continuous air waveguiding over kilometer and longer ranges easily achievable with existing laser technology and modest power levels.

via Phys.org|

#air-waveguides #continuous-wave #laser-beams