50-Gb/s silicon quadrature phase-shift keying modulator
- 31 August 2012
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 20 (19), 21181-21186
- https://doi.org/10.1364/oe.20.021181
Abstract
We report the first successful demonstration of quadrature phase-shift keying (QPSK) modulation using two nested silicon Mach-Zehnder modulators. 50-Gb/s QPSK signal is generated with only 2.7-dB optical signal-to-noise ratio penalties from the theoretical limit at a bit-error ratio of 10−3. This result validates that silicon photonics could be a viable and powerful platform of photonic integrated circuits in coherent optical communications.Keywords
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