Terabit-class data pipes movies in an instant

With super-fast internet connections looming, more of us will be watching new movies at home.

When it comes to internet speeds, we've long-since consigned the humble kilobit-class connection to the dustbin, so a mathematics-based breakthrough has us wondering if megabit- and even gigabit-level connections will one day sound as quaintly archaic.

Researchers at Japan's Tohoku University have tweaked existing protocols to enable standard fibre-optic cables to carry data at hundreds of terabits per second [Subscription link]. At that speed, full movies could be downloaded almost instantaneously in their hundreds.

QAM made stable

At the heart of the development is a technique already used in some digital TV tuners and wireless data connections called quadrature amplitude modulation (QAM). One glance at the Wikipedia explanation shows that it's no easy science, but the basics of QAM in this scenario require a stable wavelength for data transmission.

As the radio spectrum provides this, QAM-based methods work fine for some wireless protocols, however the nature of the optical spectrum means this has not been the case for fibre-optic cables ... until now.

The university team has solved the stability problem using a special laser that makes it feasible to pipe data down a glass fibre using the QAM method at blistering speeds. Although we shouldn't expect to be choosing from internet connections rated in Tbit/s anytime soon, the development could one day make us look back on ADSL as fondly as we now do our 56K modems.

J Mark Lytle was an International Editor for TechRadar, based out of Tokyo, who now works as a Script Editor, Consultant at NHK, the Japan Broadcasting Corporation. Writer, multi-platform journalist, all-round editorial and PR consultant with many years' experience as a professional writer, their bylines include CNN, Snap Media and IDG.

Latest in Websites & Apps
Google Maps on a phone being held in someone's hand
Google Maps is getting two key upgrades, for easier route planning and quicker access to Gemini AI
Quordle on a smartphone held in a hand
Quordle hints and answers for Thursday, March 27 (game #1158)
NYT Strands homescreen on a mobile phone screen, on a light blue background
NYT Strands hints and answers for Thursday, March 27 (game #389)
Quordle on a smartphone held in a hand
Quordle hints and answers for Wednesday, March 26 (game #1157)
NYT Strands homescreen on a mobile phone screen, on a light blue background
NYT Strands hints and answers for Wednesday, March 26 (game #388)
Quordle on a smartphone held in a hand
Quordle hints and answers for Tuesday, March 25 (game #1156)
Latest in News
EA Sports F1 25 promotional image featuring drivers Oscar Piastri, Carlos Sainz and Oliver Bearman.
F1 25 has been officially announced, with this year's entry marking a return for Braking Point and a 'significant overhaul' for My Team mode
Garmin clippd integration
Garmin's golf watches just got a big software integration upgrade to help you improve your game
Robert Downey Jr reveals himself as Doctor Doom to a delighted crowd at San Diego Comic-Con 2024
Marvel is currently making a major announcement about Avengers: Doomsday's cast on YouTube, and I think it's going to be a long-winded reveal
Samsung QN90F on yellow background
Samsung announces US prices for its 2025 mini-LED TV lineup, and it’s good and bad news
Nintendo Switch Lite
Forget the Nintendo Switch 2, the original Switch is getting one last hurrah in a surprise Nintendo Direct tomorrow
The Samsung Galaxy S25 Edge on display the January 22, 2025 Galaxy Unpacked event.
Samsung Galaxy S25 Edge colors seemingly revealed in new video, and there’s another sign of an imminent launch