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We experimentally demonstrate 25-Gb/s downstream transmission over 20-km SSMF in a Faster-than-Nyquist PON with 10G-class optics based on pre-distorted NRZ, achieving −26 dBm receiver sensitivity and over 31 dB loss budget without any optical amplification.
Compared with other kinds of electronic instrument transformers, the All Fiber-Optic Current Transformer (FOCT) have the advantages of high accuracy, wide dynamic range, strong ability to resist electromagnetic interference environment, simple and flexible of installation. But because of the short-time application, the operation reliability of FOCT can't be assessed base on the operational log we...
We demonstrate that a subwavelength plasmonic metamolecule consisting of four nanoparticles supports a magnetic response spectrally overlapped with the electric dipole resonance. Small structural asymmetries lead to interference and thus a Fano resonance in scattering.
We discuss the use of plasmonic nanoantennas to drastically enhance and tailor the linear and nonlinear response of optical materials to realize novel optical nanodevices for optical communications and computing, energy harvesting and sensing applications. By translating some of the familiar concepts of radio-frequency antennas to the visible spectrum, we propose a variety of exciting designs to tailor...
We review high sensitivity modulation formats and in particular, review the principle, implementation, and performance of formats based on the combined use of polarization-division-multiplexed quadrature phase-shift keying (PDM-QPSK, or PQ) and mary pulse-position modulation (m-PPM).
We propose a power-efficient modulation/detection scheme that combines PDM-QPSK and 16-ary-pulse-position-modulation. A record sensitivity of 3.5 photons per bit at BER=10-3 is experimentally demonstrated at 2.5 Gb/s with digital coherent-detection, outperforming PDM-QPSK by >;3 dB.
We review current technologies that enable mixed 10 G/40 G transmission in a single DWDM system to achieve capacity upgrade, and discuss promising technologies and challenges for transmitting 100-Gb/s channels in the same system for further upgrade.
We present a data-aided multi-symbol phase estimation scheme that improves the receiver sensitivities of direct-detection optical DQPSK and DQPSK/ASK. Sensitivity improvements of 1.7dB and 1.4dB are respectively obtained for DQPSK and DQPSK/ASK in the linear-regime.
We demonstrate a novel receiver concept for duobinary signals that allows for data recovery with a sensitivity of -39.5 dBm (88 Photons/bit, BER=1.10/sup -9/, 2/sup 31/ -1 PRBS). Oversampling together with maximum likelihood sampling phase estimation results in superior back-to-back performance without lowering the large chromatic dispersion tolerance of duobinary signaling.
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