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We fabricate a nonlinear optical device based on a fiber pigtail cross-section coated with a single-layer graphene grown by chemical vapor deposition (CVD) method. We demonstrate 10-Gbaud three-input quaternary hybrid addition and subtraction (A+B−C, A+C−B, B+C−A) in the experiment.
By exploiting multiple non-degenerate four-wave mixing (FWM) and quadrature phase-shift keying (QPSK) signals, we experimentally demonstrate three-input (A, B, C) simultaneous multicasted quaternary addition/subtraction (A+C-B, A+B-C, B+C-A) at 20 Gbit/s based on a silicon waveguide. Alignment tolerance of three input signals is also evaluated in the experiment.
By exploiting microring with interleaved tailored angular gratings, we present a simple design of integrated circularly polarized orbital angular momentum (OAM) beam emitter. The Stokes parameter S3 is above 0.97 with high OAM purity of 99.84%.
By exploiting two degenerate four-wave mixing in a silicon waveguide and quadrature phase-shift keying (QPSK) signals, we experimentally demonstrate two-input (A, B) simultaneous optical quaternary hybrid doubling/subtraction (2A-B, 2B-A).
We experimentally demonstrate FWM based wavelength conversion of a 10 Gbaud/s QPSK signal with graphene grown by CVD method. The observed OSNR penalty is around 1 dB for QPSK wavelength conversion.
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