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We investigate the performance of linear equalization combined with MLSE in long-haul transmission. In the nonlinear regime with high launch powers Q-factor improvement up to 1.4 dB is demonstrated wi...
We propose a straightforward algorithm to estimate second-order PMD from adaptive FIR-filter tap coefficients in a digital coherent optical receiver. The novel algorithm is verified with 100-Gbit/s du...
Single reconfigurable DSP coherent receiver is experimentally demonstrated for mixed-format and bit-rates including QPSK, OFDM, IR-UWB for wireline and wireless signal types. Successful transmission o...
A new compact coherent receiver module comprising a micro-optic polarization beam splitter and two InP-based 90 0 hybrids with integrated photodiodes is characterized at 112 Gbit/s DP-QPSK. A penalty ...
We developed a single-chip InP coherent receiver for detection of PDM-QPSK signals,which meets specifications for 100G between 1530 and 1570 nm. Integration includes a mode converter for efficient cou...
A novel frequency offset estimator is proposed and implemented in a 1Gbit/s real-time coherent receiver to demonstrate all-digital frequency offset compensation up to ±0.4 symbol rate.
The tolerance to PMD of 100Gb/s PDM-QPSK systems is investigated in linear and nonlinear regime.Experimental results show that nonlinear effects decrease the robustness of the system against PMD.
We demodulate a 480-Gbit/s 8PSK signal with a digital coherent receiver having time-division demultiplexing function. The receiver sensitivity is -20 dBm at BER of 10 -5 .

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