Optical encryption as a function of polarization in optical fiber communications

Syed H. Murshid; Hari Priya Muralikrishnan; Jayachandran Tamilarasan; Abhijit Chakravarty; H. John Caulfield

doi:10.1117/12.884426

4 May 2011 Optical encryption as a function of polarization in optical fiber communications

Syed H. Murshid, Hari Priya Muralikrishnan, Jayachandran Tamilarasan, Abhijit Chakravarty, H. John Caulfield

Proceedings Volume 8054, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications VII; 80540M (2011) https://doi.org/10.1117/12.884426
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

An optical encryption technique based on polarization property of light is proposed. Many techniques using polarization beam splitters to encrypt the signal have been proposed earlier. They are based on splitting and interference of two light signals, namely message and noise. Only by placing suitable mirrors and a second beam splitter in a suitable position, the two signals are reconstructed at the output. In this paper we report the fiber optic version of a polarization based encryption technique that also has the potential to double the data carrying capacity of the fiber. Using polarization dependent couplers in the fiber optic cables, we are able to achieve encryption of the light signal. Theoretical analysis and simulated results are also presented.

Citation Download Citation

Syed H. Murshid, Hari Priya Muralikrishnan, Jayachandran Tamilarasan, Abhijit Chakravarty, and H. John Caulfield "Optical encryption as a function of polarization in optical fiber communications", Proc. SPIE 8054, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications VII, 80540M (4 May 2011); https://doi.org/10.1117/12.884426

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