Measurement of Constellation Diagrams for 40-Gb/s DQPSK and 60- Gb/s 8ary-DPSK Using Sampled Orthogonal Differential Direct-Detection
Conference: ECOC 2007 - 33rd European Conference and Exhibition of Optical Communication
09/16/2007 - 09/20/2007 at Berlin, Germany
Proceedings: ECOC 2007
Pages: 2Language: englishTyp: PDF
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Authors:
Liu, X.; Chandrasekhar, S. (Bell Laboratories, Alcatel-Lucent, Holmdel, NJ 07733, USA)
Abstract:
We demonstrate the reconstruction of constellation diagrams for 40-Gb/s DQPSK and 60-Gb/s 8ary- DPSK signals using orthogonal differential direct-detection and analog-to-digital conversion. The recovered differential-phase variance manifests various transmission impairments including noise and fiber nonlinearity.