Home
 » ISP News » 
Sponsored Links

Bell Labs Boost Fibre Optic Speeds to 400Gbps Using Phase Conjugation

Thursday, May 30th, 2013 (2:31 pm) - Score 963

Bell Labs, the New Jersey (USA) based research and development subsidiary of telecoms giant Alcatel-Lucent, has found a way of boosting data speeds down fibre optic cables by using two light beams in opposing phases to cancel out interference that would ordinarily slow the transfer.

The method, which is in principal vaguely similar to the noise cancellation technology used in some headphones (or vectoring on copper VDSL2 (FTTC) lines), allowed the researchers to transmit information at a speed of 400Gbps (Gigabits per second) down a 12,800km long super-channel fibre optic cable.

Extract from Nature Photonics

Kerr nonlinearity imposes a limit on the achievable transmission performance and capacity of optical fibre communication links. We show that the nonlinear distortions of a pair of phase-conjugated twin waves are essentially anti-correlated, so cancellation of signal-to-signal nonlinear interactions can be achieved by coherently superimposing the twin waves at the end of the transmission line.

We demonstrate that by applying this approach to fibre communication, nonlinear distortions can be reduced by >8.5 dB.

The idea of using Optical Phase Conjugation to tackle interference has actually been around for quite a while (I can recall reading about it 15 years ago) but as ever it can take time to turn such concepts into engineered reality.

Never the less this development, if it can be turned into a commercially viable upgrade, could one day join many other recent improvements (hollow fibres etc.) in helping to boost the global data capacity of fibre optic connections (especially the international undersea links).

After all it’s often better to upgrade an existing link than to deploy another expensive cable across the ocean.

Mark-Jackson
By Mark Jackson
Mark is a professional technology writer, IT consultant and computer engineer from Dorset (England), he also founded ISPreview in 1999 and enjoys analysing the latest telecoms and broadband developments. Find me on X (Twitter), Mastodon, Facebook and .
Search ISP News
Search ISP Listings
Search ISP Reviews

Comments are closed

Cheap BIG ISPs for 100Mbps+
Community Fibre UK ISP Logo
150Mbps
Gift: None
Virgin Media UK ISP Logo
Virgin Media £26.00
132Mbps
Gift: None
Shell Energy UK ISP Logo
Shell Energy £26.99
109Mbps
Gift: None
Sky Broadband UK ISP Logo
100Mbps
Gift: None
Plusnet UK ISP Logo
Plusnet £27.99
145Mbps
Gift: None
Large Availability | View All
Cheapest ISPs for 100Mbps+
Gigaclear UK ISP Logo
Gigaclear £17.00
200Mbps
Gift: None
YouFibre UK ISP Logo
YouFibre £19.99
150Mbps
Gift: None
Community Fibre UK ISP Logo
150Mbps
Gift: None
BeFibre UK ISP Logo
BeFibre £21.00
150Mbps
Gift: £25 Love2Shop Card
Hey! Broadband UK ISP Logo
150Mbps
Gift: None
Large Availability | View All
The Top 15 Category Tags
  1. FTTP (5526)
  2. BT (3518)
  3. Politics (2541)
  4. Openreach (2298)
  5. Business (2264)
  6. Building Digital UK (2246)
  7. FTTC (2044)
  8. Mobile Broadband (1975)
  9. Statistics (1789)
  10. 4G (1666)
  11. Virgin Media (1621)
  12. Ofcom Regulation (1463)
  13. Fibre Optic (1395)
  14. Wireless Internet (1390)
  15. FTTH (1382)

Helpful ISP Guides and Tips

Promotion
Sponsored

Copyright © 1999 to Present - ISPreview.co.uk - All Rights Reserved - Terms , Privacy and Cookie Policy , Links , Website Rules , Contact
Mastodon