Double secu rity level in optical commun ication systems usin g combin ed modulation formats

D. Sadot, P. Szilagyi, A. Shkiler

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


A new optical communication system exhibiting a double security level is presented. Information coding is based on combined modulation formats of two data streams over the same optical carrier. Incoherent and coherent optical encryption algorithms are presented and are theoretically analyzed. The optical encryption method is transparent to data bit rates. Furthermore, it requires ``on-line’ ’ data decoding with no possibility of recording and further processing. The incoherent scheme is very practical and can be implemented in existing optical communications systems, using currently available technology. Computer experiments of the in coherent method indicate less than 25 dB of signal to noise ratio required for 10 y 9 bit error rate and ineligible information decoding time of more than 10 8 years.

Original languageEnglish
Pages (from-to)199-209
Number of pages11
JournalFiber and Integrated Optics
Issue number4
StatePublished - 1 Jan 1999
Externally publishedYes


  • Cohe rent encription
  • Combined modulation
  • Incohe rent encription
  • Optical encription
  • Optical ke ying

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Double secu rity level in optical commun ication systems usin g combin ed modulation formats'. Together they form a unique fingerprint.

Cite this