Duobinary transmission using coherent detection

Gilad Goldfarb; Cheolhwan Kim; Guifang Li

doi:10.1117/12.669734

12 May 2006 Duobinary transmission using coherent detection

Gilad Goldfarb, Cheolhwan Kim, Guifang Li

Proceedings Volume 6243, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications II; 62430C (2006) https://doi.org/10.1117/12.669734
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

The impact of chromatic dispersion on the complex electric field of an optical phase-coded duobinary signal is investigated through numerical simulation. The evolution of the optical field is most clearly represented by the optical constellation diagram at varying transmission distances. Dispersion causes distortion and rotation of the optical constellation, leading to eye closure of the received signal. When direct detection is employed rapid eye closure starts after approximately 213km. In this letter, the use of coherent detection is suggested to extend this transmission distance. A decision directed phase locked loop is suggested to establish the feasibility of use of coherent detection for this modulation format. Employing coherent detection increases this dispersion limit by 70km.

Citation Download Citation

Gilad Goldfarb, Cheolhwan Kim, and Guifang Li "Duobinary transmission using coherent detection", Proc. SPIE 6243, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications II, 62430C (12 May 2006); https://doi.org/10.1117/12.669734

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