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Opt Express. 2012 Dec 10;20(26):B244-9. doi: 10.1364/OE.20.00B244.

Effects of phase noise of monolithic tunable laser on coherent communication systems.

Author information

  • 1Rince Institute, School of Electronics Engineering, Dublin City University, Dublin 9, Ireland. ngoc.huynh2@mail.dcu.ie


We investigate the effects of different phase noise processes of SGDBR laser on coherent systems. The SGDBR device operated well with QPSK modulation at 5 Gbaud, while the performance of 16-QAM was significantly degraded due to excess noise. The white FM noise mainly defines the ultimate performance of coherent reception, but the low frequency excess noise can potentially degrade the performance of systems that employ 16-QAM format at 5 Gbaud.

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