Wavelength-division multiplexing

About: Wavelength-division multiplexing is a research topic. Over the lifetime, 25059 publications have been published within this topic receiving 332027 citations. The topic is also known as: WDM.

A novel centrally controlled protection scheme for traffic restoration in WDM passive optical networks

Abstract: We propose and experimentally demonstrate a novel centrally controlled protection scheme for arrayed waveguide grating-based bidirectional wavelength-division-multiplexing passive optical networks which can provide automatic traffic restoration against fiber cut between remote node and optical network unit. Compared with the previous structures, its requirements on the network resources are greatly reduced with negligible protection performance degradation.

Integrated optical router

Abstract: An optical router integrated in an InP-based substrate bonded to a single thermo-electric cooler for packet-based networks utilizing wavelength-division multiplexing (WDM) on silica fibers. Input and output arrayed waveguide gratings (AWGs) respectively demultiplex and multiplex the WDM signals to and from multiple transmission fibers. Input and output wavelength converters are connected between the input and outputs AWGs and a switching AWG. The output converts may include a tunable laser and interferometer formed in the same substrate. The header information is preferably carried out-of-channel from the WDM data signals, either in the same fiber band or a different one. Photodetectors and laser diodes are formed in the same substrate. Fast RF electronics are formed in GaAs chips and slower electronics formed in a silicon chip are bonded to the InP wafer

An all-optical wavelength-converter with semiconductor optical amplifiers monolithically integrated in an asymmetric passive Mach-Zehnder interferometer

Abstract: An all-optical wavelength-converter based on monolithic integration of a Mach-Zehnder interferometer and integrated semiconductor optical amplifiers was demonstrated. This device exhibited high stability, penalty-free conversion at 5 Gbit/s (at a BER of 10/sup 9/), no-excess penalty after a transmission over 60 km on standard fiber, and low signal-polarization dependency. The device operated in a 26-nm-wide optical window. >

Visible light communications: real time 10 Mb/s link with a low bandwidth polymer light-emitting diode

Abstract: This paper presents new experimental results on a polymer light-emitting diode based visible light communications system. For the first time we demonstrate a 10 Mb/s link based on the on-off keying data format with real time equalization on a field programmable gate array. The 10 Mb/s transmission speed is available at a bit error rate less than 4.6 × 10−3, which is the limit for forward error correction. At a BER of 10−6 a transmission speed of 7 Mb/s is readily achievable.

Space-Division Multiplexed High-Speed Superchannel Transmission Over Few-Mode Fiber

Abstract: Space-division multiplexed (SDM) transmission based on multi-core (MCF) or multi-mode fiber (MMF) emerges as one of the most promising solutions for overcoming the capacity limit of standard single mode fiber (SSMF). This paper places a focus on the MMF transmission for which a data rate of 100-Gb/s and beyond has been recently demonstrated through coherent-optical OFDM (CO-OFDM) and single-carrier (SC) superchannel transmission based on specially-designed few-mode fibers (FMF). However, to unleash the full potential of the high data rate SDM transmission requires brand-new research from device to system level. In this paper, we elucidate the overall system architecture, critical components and sub-system modules for SDM transmission and report the up-to-date demonstration of SDM superchannel transmission. We envisage that the combination of SDM and OFDM modulation could be a potential key route to the future Tb/s and beyond optical transports.