High-Dimensional Quantum Encryption Performed in Real-World City Conditions for First Time

http://www.osa.org/en-us/about_osa/newsroom/news_releases/2017/high-dimensional_quantum_encryption_performed_in_r/ For the first time, researchers have sent a quantum-secured message containing more than one bit of information per photon through the air above a city. The demonstration showed that it could one day be practical to use high-capacity, free-space quantum communication to create a highly secure link between ground-based networks and satellites, a requirement

Fiber optic testing updates

Few days ago I read The remarkable evolution of modern fiber-optic connector inspection probes article tells about the current state of fiber inspection. Especially with multifiber connectors such as MPO, MT, and MXC microscopic connector endface dirt and debris cause light reflections and attenuation – the enemies of optimal optical signal transmission. Thankfully there now

A Photon Has Been Sent To Space Using Quantum Teleportation | IFLScience

http://www.iflscience.com/physics/a-photon-has-been-sent-to-space-using-quantum-teleportation/ Last month, Chinese researchers showed that quantum communication between Earth and space is possible, and now they have used the tech to send a photon to space using quantum teleportation. As this research shows, to create a truly global network for quantum communication, we will need quantum satellites.

Under the Hood of Luminar’s Long-Reach Lidar – IEEE Spectrum

http://spectrum.ieee.org/cars-that-think/transportation/self-driving/under-the-hood-of-luminars-long-reach-lidar Current automotive lidars scan their surroundings by firing pulses from semiconductor diode lasers emitting at 905 nanometers in the near infrared and recording reflected light to build up a point cloud mapping the car’s surroundings.  But laser-safety rules in the U.S. and other countries restrict the power in the laser pulse, limiting the lidar’s

World’s Brightest Laser Is Literally Changing How We See Things | IFLScience

http://www.iflscience.com/space/worlds-brightest-laser-is-literally-changing-how-we-see-things/ This is interesting news: Researchers have used the brightest light source in the world and it’s changing the way we see things. “When we have this unimaginably bright light, it turns out that the scattering – this fundamental thing that makes everything visible – fundamentally changes in nature,” senior author Donald Umstadter, the Leland

Fiber optics power meter

An optical power meter (OPM) is a device used to measure the power in an optical signal. The term usually refers to a device for testing average power in fiber optic systems. Power meters are part of the toolbox essentials for all technicians installing or maintaining any type of fiber networks. They are used to

Superfast camera captures cone-shaped wakes of light

Pulses of light can leave behind cone-shaped wakes of light, somewhat similar tocone-shaped sonic booms created byaircraft flying at supersonic speeds. Now, a superfast camera has captured the first-ever video of these events. To capture video of these elusive light-scattering events, the researchers developed a “streak camera” that could capture images at speeds of 100