Telecom

Optical links to connect air passengers securely

A laser communications terminal prototype to demonstrate this vision is currently being developed by satellite manufacturer Airbus, working in partnership with the Netherlands organization for applied scientific research ...

Electronics & Semiconductors

Renewable energy, new perspectives for photovoltaic cells

In the future, photovoltaic cells could be 'worn' over clothes, placed on cars or even on beach umbrellas. These are just some of the possible developments from a study published in Nature Communications by researchers at ...

Engineering

Less-wasteful laser-cutting

Laser-cutting is an essential part of many industries, from car manufacturing to construction. However, the process isn't always easy or efficient: Cutting huge sheets of metal requires time and expertise, and even the most ...

Robotics

Wielding a laser beam deep inside the body

Minimally invasive surgeries in which surgeons gain access to internal tissues through natural orifices or small external excisions are common practice in medicine. They are performed for problems as diverse as delivering ...

Robotics

Robot reminds Japan shoppers to wear masks

Asking someone to put on a mask is a touchy subject, so one shop in Japan has enlisted a robot to make sure its customers wear them during the pandemic.

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Laser

A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.

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