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We will review the transmissions of a high-speed (> 100Gb/s) direct-detection superchannel using optical OFDM over an all-EDFA-based standard-single-mode-fiber (SSMF) link.
A novel method for improving phase coherence of optical pulse train with wavelength conversion based on cross-phase modulation and four-wave mixing effects in the high nonlinear fiber is proposed. The approach is experimentally demonstrated and shows good performation to the MLFL pulse train.
This paper aims to provide a concise yet comprehensive insights in dimensioning header processing FDLs. We study the effect of header processing on the packet drop probability, by taking into account different FDL size and packet arriving parameters. Our results show that header processing may incur un-negligible packet loss even before the packets are routed, especially when traffic load and burstiness...
We plan for the optical channel layer to minimize the required numbers of lit fibers and turned-on optical amplifiers through a Mixed Integer Linear Programming (MILP) model and an efficient heuristic. Simulation studies indicate that the green communication-oriented effort can not only reduce the number of turned-on optical amplifiers but also the lit fibers.
This paper describes the crosstalk calculation technique to enhance the simulator that enable future wavelength routing networks design including power budgget, fiber dispersion, and ASE noise.
We review recent work on all-optical wavelength multicasting based on various techniques. We introduce two four-wave mixing based multicasting schemes; one is in highly nonlinear fiber loop mirror, the other is of reduced polarization sensitivity.
We provide a comprehensive investigation of all-optical modulation format conversion from OOK-to-DPSK at 10 Gb/s using cross-phase modulation. We also present results on OOK-to-DPSK modulation format conversion with wavelength multicasting.
Flexible wavelength division multiplexing improves resource utilization in optical networks. In this paper, we review the recent progresses in FWDM research on both the physical layer and the control plane aspects.
We propose subband-based optical networking on optical OFDM or SCFDM superchannels. We experimentally demonstrate the feasibilities of switching and add-drop functionalities on individual subbands with a frequency spacing of 10-GHz.
We show that using lightpath data interchange (LPI) is a practical way to provide optical burst switching (OBS) services in networks with slow optical switches such as wave-length-routed (WR) networks.
A bend-resistant single-mode photonic crystal fiber (PCF) is presented based on the existence of a triangular core, and two cladding layers. Simulations show that it has a great ability against the bend-induced mode distortion and loss.
We proposed to use Raman amplifiers to extend the amplifier span of phase sensitive FOPAs. We numerically demonstrated two proposed schemes that can extend the amplifier span by about 25 km as well as reduce power consumption by 37%.
In this paper we propose a method of laser ranging by combining phase method and multi-cycle pulse method. We use the multi-cycle time to determine the distance, and use phase-shift to improve the measurement precision.
We discuss the recent progress in the research of hybrid WDM-TDM access networks. Different system design issues of the long-reach (LR) passive-optical-network (PON) and the short-reach (SR) wireless fiber-to-the-antenna (FTTA) system will be discussed.
A photonic-crystal-fiber surface-plasma-resonance sensor is investigated theoretically. Simulation indicates the resonance peak is extremely sensitive to fiber structure and golden film thickness, thus its shape and position can be tuned and optimized.
A two-dimensional photonic crystal (PC) four wavelength division multiplexing(WDM) based on multimode interference(MMI) theory is proposed, which realizes four wavelength divisions by cascading. The device is more compact and its performance parameters is improved.
Different output forms of mode-locked pulses, a single vector soliton pulse, unbound vector soliton bunches and soliton molecules are observed in fiber laser. The physical mechanisms of different forms of vector solitons owe to the different polarization filtering effects of polarization-dependent isolator.
By using optical duo-binary (ODB) modulation format, we have demonstrated 4×25-Gbps WDM transmission over 40-km SMFs at 1550nm without dispersion compensation and optical amplification, which could be a cost-effective candidate for 100GE applications.
We present results from theoretical analysis of the ultra-fast phase dynamics in semiconductor optical amplifiers in a numerical model. Furthermore, we explain the reason why a delay occurs between gain response and phase response.
An iterative Wiener deconvolution approach is proposed to monitor optical power from broadened spectrum. Experimental results show that it can accurately monitor the power in a mixed line rate network with 50-GHz spacing.
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