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With the recent trend of employing spectrally efficient multi-level modulation formats in optical communication systems, it is highly desirable to exploit the all-optical wavelength conversion (AOWC) schemes for formats, such as 16- or 64- quadrature amplitude modulation (QAM) signals. Since the linear and nonlinear phase noise is transferred with the data to the converted wavelength in AOWC subsystem,...
We experimentally demonstrate a 50-Gbps 16QAM wavelength conversion with <0.2dB penalty, based on FWM in HNLF using coherent pumps. The coherent pumping makes it independent of the phase noise from pumps and enables the use of cost-effective pump laser.
We propose and experimentally demonstrate optical data exchange scheme between 16QAM and QPSK with narrow spacing of 50GHz. The use of coherent pump makes it free of phase noise from pumps, and enables the use of low-cost DFB as pump source.
We propose a pump-linewidth-tolerant wavelength conversion scheme with coherent two-tone pump, and demonstrate high quality wavelength conversion of 64QAM signals with <0.3-dB penalty at BER of 10−3 even using 3.5MHz-linewidth DFB pump source.
We experimentally demonstrate wavelength conversions of 50-Gbps 36QAM and 60-Gbps 64QAM through four-wave mixing in highly-nonlinear fiber. Error free operations are successfully achieved for converted high-order QAMs with negligible power penalty at BER of 10−3.
Bandwidth defragmentation, i.e., the operation to reconfigure existing connections for making the spectrum usage less fragmented and less misaligned, has recently been recognized as one of the most important features for elastic optical networks (EONs). In this paper, we propose a novel comprehensive bandwidth defragmentation algorithm that considers the problems of 1) When to defragment? 2) What...
We experimentally demonstrate wavelength conversion of a 50-Gbps 36QAM using four-wave mixing effect in highly-nonlinear fiber. Error free is experimentally achieved with a 0.3-dB power penalty at BER of 10−3 with respect to the input.
To enable the quick applications and services of new-born innovative optical network service (INS) in large-scale high-end grid computing, we propose an overlay approach to integrate grid and emerging INS resources establishing the value-added optical grid network flexibly cross over multi-domain WSONs. In particular, we introduce an edge-mode approach which flexibly leverages new multi-function wavelength...
We experimentally demonstrate a 160-Gb/s tunable and phase-transparent wavelength conversion using cSFG-DFG in a linear-chirped PPLN. Thanks to the enhanced conversion bandwidth, no any optical equalizer was required to compensate the spectrum distortion.
Error-free all-optical amplitude and phase multiplexing is experimentally demonstrated based on nonlinearities in HNLF and EAM to simultaneously generate two 30-Gb/s RZ-8-APSK signals from input 10-Gb/s OOK and 20-Gb/s RZ-DQPSK in an all-optical manner.
We propose and experimentally demonstrate an optical phase ldquoadd/droprdquo scheme to enable the format conversion between a 20-Gb/s DQPSK and a 10-Gb/s DPSK. Meanwhile, the incoming DQPSK could be directly forwarded to another wavelength.
We propose and experimentally demonstrate a compact all-optical DPSK wavelength multicasting scheme using dual-pump FWM in a Bi-HNLF with only 2-m long. Less than 0.6-dB power penalty is obtained for the converted signals.
We propose and experimentally demonstrate a compact 1-to-5 DPSK wavelength multicasting scheme using FWM with three unequally-spaced pumps in a 2-m-long Bi-HNLF. Power penalties are within 1.9-dB for all the converted signals.
In this letter, we propose and experimentally demonstrate an optical amplitude and phase multiplexing scheme to generate a multilevel modulation format signal, return-to-zero eight-amplitude and phase-shifted keying (RZ-8-APSK). The proposed optical amplitude and phase multiplexing is mainly based on four-wave mixing (FWM) in highly nonlinear fiber. Cross-absorption modulation in an electroabsorption...
We have demonstrated an all-optical wavelength conversion and multicasting for a 10 Gb/s NRZ system with 100GHz channel spacing by using a single-stage two-pump fiber optical parametric amplifier (OPA) with the conversion gain of at least 15dB.
We have demonstrated, for the first time to our knowledge, simultaneous all-optical inverted and non-inverted wavelength conversion by using a single-stage two-pump fiber optical parametric amplifier with extinction ratio between 7 and 14 dB over 24 nm
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