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We demonstrate an optical transmission system based on a 6-level PSK modulation format and differential detection with a partial symbol delay. The 6-level PSK signal is simply generated by using a chirp-free Mach-Zehnder modulator followed by a phase modulator. In order to convert the phase information of the 6-level PSK signal into the intensity, we utilize a pair of two Mach-Zehnder delay-line interferometers...
We demonstrate error-free, no power penalty, all-optical XOR operation for 40 Gbit/s phase-encoded signals in a highly-nonlinear photonic chip. This scheme exploits the Kerr nonlinearity in a dispersion-engineered chalcogenide (As2S3) planar waveguide.
We report optical phase conjugation of wavelength multiplexed signals using a chalcogenide planar waveguide inserted along a transmission link. Distortion compensation of 3 ?? 40 Gb/s RZ-DPSK signals propagating through 225 km of standard single mode fiber is achieved.
We demonstrate broadband wavelength conversion of amplitude and phase-shift keyed signals at 40-160 Gb/s using the optical Kerr-effect in a photonic chip for the first time. This is enabled by a dispersion-shifted, highly nonlinear As2S3 waveguide.
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