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High-sensitivity 40-gb/s RZ-DPSK with forward error correction

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4 Author(s)
N. W. Spellmeyer ; Lincoln Lab., Massachusetts Inst. of Technol., Lexington, MA, USA ; J. C. Gottschalk ; D. O. Caplan ; M. L. Stevens

A high-sensitivity 40-Gb/s differential-phase-shift-keyed (DPSK) system with coding is demonstrated with back-to-back sensitivity as good as 8.7 photons per bit at a 10-9 bit-error rate. Coding is done on the 40-Gb/s data using high-speed electrical multiplexers and demultiplexers combined with four 10-Gb/s forward error correction chips that operate with 7% overhead. The DPSK receiver uses a simple approach to DPSK balanced detection.

Published in:

IEEE Photonics Technology Letters  (Volume:16 ,  Issue: 6 )