Journal
OPTICS LETTERS
Volume 37, Issue 7, Pages 1139-1141Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.37.001139
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Funding
- Program for New Century Excellent Talents in University [NCET-11-0182]
- National Natural Science Foundation of China (NSFC) [61077051]
- Natural Science Foundation of Hubei Province of China [2011CDB032]
- Defense Advanced Research Projects Agency (DARPA) [FA8650-08-1-7820]
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We propose an innovative approach to implementing multiple arithmetic functions of quaternary numbers using optical nonlinearities and differential quadrature phase-shift keying (DQPSK) signals. By adopting 100 Gbit/s DQPSK signals (A, B) and exploiting nondegenerate four-wave mixing (FWM) for addition/subtraction and degenerate FWM for complement and doubling in a single highly nonlinear fiber, we demonstrate 50 Gbaud/s simultaneous quaternary addition (A + B), dual-directional subtraction (A - B, B - A), complement (-A, -B), and doubling (2B). Power penalties less than 4 dB (addition), 3 dB (dual-directional subtraction), 2 dB (complement), and 3.1 dB (doubling) are observed at a bit-error rate of 10(-9). (C) 2012 Optical Society of America
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