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We propose and demonstrate an optical flat datacenter network based on scalable optical switch system with optical flow control. Experimental evaluation of the system at data rate of 40 Gb/s includes a 4×4 optical switch with highly distributed control for port-count independent nanosecond reconfiguration time for low latency operation. The hardware flow control at the optical level allows fast retransmission...
In this study, we provide an experimental assessment of a quantum dash Fabry–Pérot mode-locked laser for all-optical clock recovery using data streams at 40, 80, 160, and 320 Gb/s. The data streams at 80, 160, and 320 Gb/s are phase coherent signals featuring no spectral component at 40 GHz. The 40 GHz recovered optical clock signal is characterized in terms of phase noise, timing jitter, dynamic...
Applications running inside data centers are enabled through the cooperation of thousands of servers arranged in racks and interconnected together through the data center network. Current DCN architectures based on electronic devices are neither scalable to face the massive growth of DCs, nor flexible enough to efficiently and cost-effectively support highly dynamic application traffic profiles. The...
All-optical logic NOT gate based on cross phase modulation in fiber using a negatively pre-chirped pulse probe is demonstrated with improved extinction ratio (ER) at 10 Gb/s. The output ER is improved by 3 dB using pre-chirped probe compared with the chirp free probe.
We propose a novel technique to achieve optical frequency up-conversion in millimeter wave band without any local microwave oscillator. By utilizing injection locking of Febry-Perot Laser diode, a suitable negative dispersion device and polarization interferometer, a 2.5 Gb/s baseband signal is frequency up-conversion to a subcarrier modulation signal at 30.8 GHz.
40 Gb/s optical demultiplexing with amplitude regeneration is demonstrated based on data pump fiber-optical parametric amplification while a 10 GHz short pulse is used as the probe. Four 10 Gb/s output channels with at least 14 dB extinction ratio enhancement and an average 5.5 Q factor is obtained after demultiplexing.
the optical pulses at a multiplied repetition frequency is generated by Fractional Talbot effect in optical fiber. The optical pulses at 20GHz, 40GHz and 50GHz repetition frequency are obtained from the original pulse with 2.8ps width at 10GHz and the optical pulses at 5GHz is octupled to 40GHz.
A simultaneous optical signal extracting and erasing scheme is presented by utilizing four-wave mixing in optical fiber. Two synchronized gate and negation gate pulses, coupled with data stream, produce FWM effect to implement extracting and erasing functions. Experimental results are successfully demonstrated with NRZ data at 10 Gb/s.
Based on 40Gbit/s Return-to-zero differential phase-shift keying (RZ-DPSK) DWDM system, the four dispersion management programs are proposed to suppress optical pulse phase jitter induced by kerr nonlinear effect including the self-phase modulation (SPM) and cross- phase modulation (XPM). The tolerance against the kerr nonlinear effect is studied through detailed numerical simulation by Split-Step...
A novel approach is proposed to reduce the cross phase modulation between multiple clock pump in the multi-wavelength optical decision based optical fiber parametric amplifier. The dispersive media is used to preprocess the pump clock, and then the clock pump is changed from intensity modulation into phase modulation.
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