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Journals and Conferences
We discuss the use of a coherent digital receiver for the compensation of linear transmission impairments and polarization demultiplexing in a transmission system compatible with a future 100-Gb/s… (More)
We present simulations and measurements on the effect of PDL on a POLMUX-NRZ- DQPSK signal. We show that the orientation between the POLMUX signal and PDL element has a major impact on the OSNR… (More)
We demonstrate joint polarization carrier phase estimation for XPM-limited channels with significant improvements over standard methods, demonstrated on measurements of 43 Gb/s NRZ-CP-QPSK with 10.7… (More)
A novel clock recovery architecture is presented that includes a feed-forward variable delay element. The architecture is resilient to channel distortion and achieves good performance with Nyquist… (More)
In DWDM field experiments over 1047 km of standard fiber and in simulations we analyze the impact of crosstalk on a 43 Gb/s RZ-DQPSK channel both by 10.7 Gb/s OOK and 43 Gb/s RZ-DQPSK neighbors at 50… (More)
We review performance monitoring using data of the digital equalizer of coherent receivers and show simulation and measurement results from 43 Gb/s transmission data.
We present channel spacing measurements on a 28Gbaud CP-QPSK transmitter applying Nyquist-like signal shaping without using optical filters. This is enabled by a single sample per symbol… (More)
Coherent pluggable modules will separate the DSP chip from optics. Challenges of such architecture are exemplarily discussed for the transmitter side based on simulations. Measurements show… (More)
We review real-time and off-line processing techniques for the proto-typing of a digital coherent receiver.
We present a robust and precise optical performance monitoring technique from FIR filter coefficients in coherent receivers with digital equalization. Residual chromatic dispersion, DGD and OSNR are… (More)