NASA receives laser-beamed message from 10 million miles away

SuchTV  |  Nov 25, 2023

NASA receives laser-beamed message from 10 million miles away
According to international media reports, the distance covered is approximately 40 times farther than the Moon's distance from Earth, and this achievement, known as 'first light,' demonstrates the first-ever optical communications link established across such an extensive space.

This milestone is part of NASA's Deep Space Optical Communications (DSOC) experiment, aiming to revolutionise communication across vast cosmic distances.

Traditional radio waves have limitations, and the utilisation of higher frequencies of light, particularly near-infrared, presents an opportunity to significantly enhance data speed and bandwidth.

The successful test opens avenues for future communication capable of transmitting high-definition video messages to and from distant celestial bodies, reducing delays in data transmission.

Trudy Kortes, Director of Technology Demonstrations at NASA Headquarters, highlights the importance of achieving 'first light' as a critical step toward higher-data-rate communications that can facilitate the exchange of scientific information, high-definition imagery, and streaming video, aligning with humanity's aspirations for space exploration.

The technology leverages infrared light, enabling the transmission of laser waves, which, while not increasing the speed of light, efficiently confines the beam to a narrow channel.

This adaptation of optical fibre technology for deep-space communication minimises power requirements and enhances security by narrowing the transmission channel.

The successful test involved encoding data bits in laser-emitted photons, a complex process requiring advanced instruments, including a superconducting high-efficiency detector array.

The laser transceiver, situated on the Psyche spacecraft, made the historic connection with the Hale Telescope at the Palomar Observatory in California while hurtling through space at high speeds.

As the Psyche spacecraft continues its mission, further tests will refine this near-infrared laser communication method, ensuring its speed and reliability for future deep space endeavours.

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