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Generation and Detection of a 56 Gb/s Signal Using a DML and Half-Cycle 16-QAM Nyquist-SCM

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2 Author(s)
Karar, A.S. ; Department of Electrical and Computer Engineering, Queen''s University, Kingston, Canada ; Cartledge, J.C.

A 16-QAM signal is generated using subcarrier modulation with a subcarrier frequency of half the symbol rate, Nyquist pulse shaping, and a directly modulated passive feedback laser at bit rates of 14, 28, and 56 Gb/s. Using polarization multiplexing emulation, a pre-amplified direct detection receiver and digital signal processing, loss margins of 12.6 and 8 dB are achieved for a 112 Gb/s dual polarization signal at back-to-back and after 4 km transmission, respectively.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 8 )