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We propose a novel technique that can compensate patterning effect by optimizing the modulation current of RSOAs, and successfully demonstrate 10.5-Gbit/s 8-PSK signal generation by directly-modulated RSOA having modulation bandwidth of only 0.9-GHz.
This paper evaluates multi-layer switching architecture vs. all-optical and all-digital switching architectures. Further, the value of incorporating super-channels is evaluated to determine benefit. A real world network model is utilized to quantify and compare results.
We discuss the evolution of carrier network infrastructure in view of the growth in packet-based services and current progress in transport network technologies, and outline key issues driving network evolution today.
Bandwidth efficiency for 100Gb/s WDM and switch architectures are compared in a North American long-haul network. Results show that OTN grooming utilizes fewest WDM wavelengths, and integrated WDM/switch architecture utilizes fewest client service interfaces.
In this paper we address scenarios of coexistence between NGPON2 and legacy technologies. Different PON dimensioning paths to be potentially followed are presented based on the enabled wavelength flexibility brought in by NGPON2.
We improved 448-Gb/s dual-carrier PDM-16QAM spectral efficiency by using optical pre-filtering and RZ pulse-shaping, allowing it to operate in a 75-GHz WDM grid transmission system at 5.6-b/s/Hz without the use of Nyquist filtering or OFDM.
World's first demonstration of WDM transmission in a HC-PBGF at the predicted low loss region of 2μm is presented. A total capacity of 16 Gbit/s is achieved using 1×8.5 Gbit/s and 3×2.5 Gbit/s channels modulated using NRZ OOK over 290 meters of hollow core fiber.
We propose a simple carrier phase estimation technique for the phase-modulated signal generated by using bandwidth-limited RSOA. By using this technique, we demonstrate 25.78-Gb/s QPSK upstream transmission in 60-km reach coherent RSOA-based WDM PON.
WDM-based next-generation access systems have been compared to G-PON/XG-PON1 for high per-user bandwidths and access-node consolidation. Only with increasing sustained user bandwidth and decreasing node number, WDM-PON gets increasingly efficient.
We experimentally demonstrate a superior performance of 20-Gbps OFDM/SC-FDE transmission over 20-km WDM-PONs, using a channelized weak-resonant-cavity FPLD with a modulation bandwidth of only 1.25 GHz by using injection-locking, direct detection and adopting the power-loading algorithm.
We experimentally demonstrate a flexible signal generator that can simultaneously generate arbitrary mixes of variable-bandwidth OFDM superchannels, and gridless WDM and OTDM channels. The device is based on reconfigurable multi-input pulse-shaping of data-modulated pulses.
We propose and experimentally investigate digital nonlinear compensation and inter-channel cross talk suppression for 4×160.8Gb/s DWDM PDM-QPSK transmission with simplified heterodyne coherent detection. The BER has been improved from 5.7×10-3 to 3.5×10-4 after 1300km SMF-28.
Tunable temperature-independent triple-idler broadcasting of a signal into selective WDM channels to cover whole C and L bands is demonstrated utilizing cascaded second-order interactions in a 20-mm-long step-chirped PPLN with an engineered ∼28-nm-wide type-0 second-harmonic bandwidth.
We experimentally demonstrate ultra-compact (<0.008mm2), 4-channel CWDM demultiplexers using silicon photonic contra-directional couplers. Flat-top passbands of 10nm, insertion loss of lower than 1dB, and crosstalk of −20dB have been obtained.
Using a temporal Fourier processor, we demonstrate full error-free demultiplexing of a 160-Gb/s OTDM signal with a single nonlinear interaction. Choice of the time-lens aperture is crucial to maximizing the overall system BER performance.
In this paper, we propose a novel optical notch filtering scheme, which can be used for optical signal to noise ratio (OSNR) monitoring. OSNR monitoring for 10-Gb/s and 40-Gb/s NRZ-OOK, NRZ-DPSK and Duo-binary signals are demonstrated in VPI transmission maker 7.6. Low bandwidth photo detector adopted in the monitoring scheme would provide immunity to chromatic dispersion (CD) and low cost solution.
In order to support future bandwidth demand from access network, a novel architecture of dynamic Multi-wavelength Time Wavelength Division Multiplexing Passive Optical Network (TWDM PON) system using multicasting Cross Gain Multiplexing (XGM) and all optical packet routing (AOPR) module in optical line terminal (OLT) is presented. The multicasting XGM technique was implemented b y using Semiconductor...
Currently, the need for “greener” telecommunication networks is stimulating research efforts to find new solutions to cope with power consumption and sustainability issues. Exploiting the potential of optical Wavelength Division Multiplexed (WDM) networks for this purpose has been identified as an attractive approach. However, the traditional WDM fixed-grid, where 50 GHz-spaced optical carriers are...
We propose to apply dicode encoding with electrical equalization in 40-Gb/s REAM-based WDM-PON. Rayleigh-backscattering tolerance and receiver sensitivity at BER of 2×10−4 are improved by 6 dB and 1.5 dB, respectively, compared with non-coded NRZ.
We investigated the WDM-PON with low-cost, mass-production C-/ L-band SFP transceivers based on injection-locked FP-LDs, and designed video transfer player systems to perform the network traffic stress test.
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