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We first demonstrated a Raman-assisted phase sensitive amplifier, which has no optical fiber path separation between pump and signal to achieve negligible power fluctuation. Better noise performance of the proposed scheme was verified with BER measurements as comparing to EDFA.
We experimentally demonstrate a tunable homodyne receiver on polarization multiplexed QPSK signals. PPLN waveguides inside the polarization diversity loops are used to frequency/phase lock the signals with the LO. Open eye diagrams with BER measurements are shown.
We experimentally demonstrate a tunable homodyne receiver on multiple-wavelength QPSK and 16-QAM channels at 20/30 Gbaud. A single PPLN waveguide is used to frequency/phase lock the signals with their tones. Open eye diagrams with BER measurements are shown.
We experimentally investigate a polarization-diversity phase-sensitive amplifier (PSA) for phase regeneration of 25-Gbaud DP-BPSK and DP-QPSK signals and show effective reduction on phase noise in both polarizations. BER measurements and reduced phase noise are achieved for both polarizations.
We experimentally characterize the performance of 100-GHz electro-optical polymer Mach–Zehnder modulators in both dual-drive and single-drive versions using broadband modulation. For the dual-drive version, we measure bit-error rate (BER) at 80 Gbit/s for differential phase-shift keying (DPSK) and > 90 Gbit/s for on-off keying (OOK). The eye diagrams of 100 Gbit/s OOK and S21 measurement of up...
We present a 2.3-Tbit/s network switching element by exploiting double-pass LCoS technology and bidirectional nonlinear effects inside a single HNLF. We demonstrate 2.3-Tbit/s grooming switch with simultaneous functions of add/drop, data exchange, and power equalization, for 23-channel 100-Gbit/s RZ-DQPSK signals.
A first practical 4-stage compensator with ∼1-ms response time is demonstrated for mitigating first- and second-order PMD on 40-Gbit/s RZ-D(Q)PSK. BER and DOP degradations are significantly improved and a power penalty of <0.5-dB is achieved at 10−9 BER under 25-ps DGD and 400-ps2 SOPMD.
We experimentally demonstrate 8-fold multicasting of a 100 Gb/s polarization-multiplexed RZOOK data signal to 200 GHz spaced copies using a highly nonlinear fiber. Degenerate four-wave mixing in a bi-directional wavelength conversion scheme is employed. An average power penalty of ~4 dB at a bit error ratio of 10-9 is observed with over 45 nm of wavelength conversion bandwidth.
We demonstrate optical multiplexing of two 21.5 Gb/s DPSK signals into a single 43 Gb/s RZ-DQPSK channel with simultaneous 7-fold multicasting of the multiplexed 43 Gb/s RZ-DQPSK signal in a single periodically-poled lithium-niobate waveguide. We also demonstrate direct 7-fold multicasting of a single 43 Gb/s RZ-DQPSK signal and give a comparison of the two schemes. A bit error rate of 10-9 with power...
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