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We propose a novel common phase error estimation method based on projection histogram (PH). Experimental results show that the proposed method can effectively compensate the common phase error. Compared to BPS, similar performances are obtained with much lower complexity.
A surface-plasmon PCF-based sensor placed into hollow-core photonic crystal fiber is modeled and analyzed in this work. We analyze the surface-plasmon sensor within Kagome hollow-core photonic crystal fiber by the finite element method, and evaluate the propagation air-guided mode and surface-plasmon modes.
We proposed an extended OpenFlow-based control mechanism for multiple connections in the OpenScale architecture to achieve Coflow-aware bandwidth scheduling. Experimental demonstration verifies its overall feasibility.
Adaptive DD-OFDM transmission is proposed for low-cost deployment of homogenous MCF links where ICXT can cause outage probabilities. Experimental demonstration shows a throughput gain relative to the static modulation of 13% and high ICXT tolerance with a reduction of the average throughput of only 9% relative to the situation measured without ICXT.
We demonstrate in-line nonlinearity compensation (NLC) of a 5-channel dual-polarization 16-QAM signal using opto-electronic sub-systems called total intensity-directed phase modulators (TID-PMs). NLC using a TID-PM placed before each span in an 800 km link improves the signal quality, Q, of the center channel by 0.4 dB at the optimum launch power.
We investigate the influence of FWM effect in O-band multi-wavelength NG-EPON system with chirped DML. Simulation results indicate that DML chirp can reduce FWM impairment to a great extent, and almost no sensitivity penalty is observed for 20km SMF transmission.
We propose a new two-stage energy-saving scheme allocating the idle time of one ONU's transceiver to other ONUs based on downstream and upstream matching and dividing ONUs into two categories which adopt different energy-saving modes according to their traffic. The simulation results show that proposed scheme can reduce the power consumption and delay of ONUs.
We propose a novel demodulation method for fiber acoustic sensor based on ripple spectrum, which comes from wavelength sweeping while spectrum varying with acoustic wave. Acoustic signal is recovered from the ripple spectrum and transformed to time domain by sweeping speed. Feasibility is demonstrated by both LPG and FPI sensor head.
A single-line bidirectional optical add-drop multiplexer is proposed to provide ring-based passive optical network with a self-healing functionality to eliminate the effect of any one fiber failure.
A CPE aiming at the low SNR region and targeting PSK formats encoded with a low-rate FEC is evaluated for the first time. Via numerical simulation of a 53.6 Gbaud DP-QSPK signal with a coding rate of 0.48, we confirm that pilot-aided CPE achieves a 0.3 dB SNR improvement over a typical blind CPE at a low-rate FEC Q-limit of 1.2 dB.
In this paper, we improve the pseudo pilot-aided orthogonal basis expansion based (PS-OBE) phase noise suppression method proposed in our recent work by linearly interpolation (LI). The LI-PS-OBE method provides a more accurate detection of the pseudo pilots and hence the system performance can be improved significantly.
A tunable single passband microwave photonic filter (MPF) with compensation for fiber dispersion induced radio frequency (RF) power fading is realized. When the central frequency of the MPF changes the passband amplitude can be kept invariant. The proposed MPF has a tunable range of 0–30 GHz and the rejection ratio exceeds 30 dB.
A novel kind of bend resistant large mode area fiber is proposed. With the introduce of a multi-layer core, this kind of fiber breaks the mode field area limitation for multi-trench fiber, and achieves a mode filed area of 1300 μm2 at a bend radius of 15cm.
Pump phase-locking method dependence of non-degenerate phase-sensitive optical amplifier (ND-PSA) repeaters on phase-conjugated twin waves transmission is investigated. Simulation results show ND-PSAs with an optical phase-locked loop method can extend a transmission distance compared to the case of an optical injection locking method in dispersion compensated links.
The presence of significantly high thermally induced reversible effect and the impact of temperature ramping rate are analyzed in FBGs during characterization of grating decay and prediction of grating lifetime in the demarcation energy domain.
We propose an optical diffuser as a holographic lens exploiting the speckle-correlation scattering matrix with the spatially random property of diffused light. Using the proposed concept, we experimentally demonstrate a holographic camera by simply placing a commercial diffuser in front of an image sensor. We also perform numerical refocusing based upon a single captured hologram of a real object...
We review the capabilities of optical parametric amplifiers based on periodically poled LiNbO3 (PPLN) waveguides for optical communication. Specifically, we discuss phase and amplitude regeneration using a phase sensitive amplifier and nonlinearity mitigation using an optical phase conjugator in multi-span transmissions.
A photonic microwave down-conversion scheme using period-one dynamics of semiconductor lasers is proposed. Microwave down-conversion from 35 GHz to 5 GHz with a 19-dB conversion efficiency is experimentally demonstrated for the proof of concept.
A 14-mode polarization-maintaining ring-core fiber (PM-RCF) is designed for spatial division multiplexing optical networks, which is compatible with single-mode fibers. All the modes are separated from their adjacent modes with effective refractive index differences larger than 10−4 whatever the PM-RCF is straight or bent at C-band.
We characterize the nonlinear optical properties of GeSbS chalcogenide glasses with fiber-based experiments. A waveguide nonlinear parameter of 7 W−1/m and nonlinear refractive index of 3.71 × 10−18 m2/W are estimated by self-phase modulation. A GeSbS waveguide could also generate a supercontinuum from 1280 to 2120 nm at the −30 dB level for maximum coupled power of 340 W, showing a 14 fold spectral...
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