Enhanced key-establishing rates and efficiencies in fiber laser key distribution systems

Doron Bar-Lev, Jacob Scheuer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The secure key-establishing efficiency of an ultra-long fiber laser key distribution system (UFL-KDS) is limited by half a key bit per cycle. We purpose and analyze novel schemes and protocols for breaking this limit while retaining system security. These schemes increase the probability of a secure bit transition by expanding the variable and coding parameters of the UFL-KDS. Furthermore, a new wavelength division multiplexing UFL implementation, which enables an additional key-establishing rate enhancement, is proposed and analyzed. These schemes further emphasize the potential in the UFL concept, in particular its security and its practical implementation properties.

Original languageEnglish
Pages (from-to)4287-4296
Number of pages10
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number46
StatePublished - 9 Nov 2009


  • Increased coding UFL
  • Increased variables UFL
  • Quantum key distribution
  • Ultra-long fiber laser
  • Wave-length division multiplexing


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