Secure key distribution over a 500 km long link using a Raman ultra-long fiber laser

Atalla El-Taher, Omer Kotlicki, Paul Harper, Sergei Turitsyn, Jacob Scheuer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

In traditional communication systems the transmission medium is considered as a given characteristic of the channel, which does not depend on the properties of the transmitter and the receiver. Recent experimental demonstrations of the feasibility of extending the laser cavity over the whole communication link connecting the two parties, forming an ultra-long fiber laser (UFL), have raised groundbreaking possibilities in communication and particularly in secure communications. Here, a 500 km long secure key distribution link based on Raman gain UFL is demonstrated. An error-free distribution of a random key with an average rate of 100 bps between the users is demonstrated and the key is shown to be unrecoverable to an eavesdropper employing either time or frequency domain passive attacks. In traditional communication systems the transmission medium is considered as a given characteristic of the channel, which does not depend on the properties of the transmitter and the receiver. Recent demonstrations of the feasibility of extending the laser cavity over the whole communication link connecting the two parties, forming an ultra-long fiber laser (UFL), have raised groundbreaking possibilities in communication. Here, a 500 km long secure key distribution link based on Raman gain UFL is demonstrated.

Original languageEnglish
Pages (from-to)436-442
Number of pages7
JournalLaser and Photonics Reviews
Volume8
Issue number3
DOIs
StatePublished - May 2014

Keywords

  • Fiber laser
  • Laser dynamics
  • Raman
  • Secure communications

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