Home
 » ISP News » 
Sponsored

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

Thursday, May 30th, 2013 (2:31 pm) - Score 934
fibre optic cable 4 fiberevolution.com

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.

Leave a Comment
0 Responses

Comments are closed.

Comments RSS Feed

Javascript must be enabled to post (most browsers do this automatically)

Privacy Notice: Please note that news comments are anonymous, which means that we do NOT require you to enter any real personal details to post a message. By clicking to submit a post you agree to storing your comment content, display name, IP, email and / or website details in our database, for as long as the post remains live.

Only the submitted name and comment will be displayed in public, while the rest will be kept private (we will never share this outside of ISPreview, regardless of whether the data is real or fake). This comment system uses submitted IP, email and website address data to spot abuse and spammers. All data is transferred via an encrypted (https secure) session.

NOTE 1: Sometimes your comment might not appear immediately due to site cache (this is cleared every few hours) or it may be caught by automated moderation / anti-spam.

NOTE 2: Comments that break our rules, spam, troll or post via known fake IP/proxy servers may be blocked or removed.
Cheapest Superfast ISPs
  • Hyperoptic £19.95 (*22.00)
    Avg. Speed 50Mbps, Unlimited
    Gift: £50 Gift Card
  • Post Office £20.90 (*37.00)
    Avg. Speed 38Mbps, Unlimited
    Gift: None
  • SSE £22.00
    Avg. Speed 35Mbps, Unlimited (FUP)
    Gift: None
  • xln telecom £22.74 (*47.94)
    Avg. Speed 66Mbps, Unlimited (FUP)
    Gift: None
  • Vodafone £22.95
    Avg. Speed 35Mbps, Unlimited
    Gift: None
Prices inc. Line Rental | View All
The Top 20 Category Tags
  1. BT (2649)
  2. FTTP (2456)
  3. FTTC (1722)
  4. Building Digital UK (1662)
  5. Politics (1539)
  6. Openreach (1510)
  7. Business (1322)
  8. FTTH (1230)
  9. Statistics (1151)
  10. Mobile Broadband (1127)
  11. Fibre Optic (1019)
  12. Ofcom Regulation (972)
  13. 4G (972)
  14. Wireless Internet (970)
  15. Virgin Media (932)
  16. EE (647)
  17. Sky Broadband (638)
  18. TalkTalk (617)
  19. Vodafone (598)
  20. 3G (437)
Promotion
Helpful ISP Guides and Tips
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
Sponsored

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