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Synchronous Demodulation of Optical Phase Shift Keying in Coherent Systems with DFB Lasers

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An I&Q digital coherent receiver with feedforward carrier recovery and clock recovery has been realized. QPSK data, currently 1.6 Gb/s over 63 km, is transmitted in real-time with FEC-compatible BER using standard commercial DFB lasers.

© 2006 Optical Society of America

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