Topic
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.
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01 Nov 1999
TL;DR: This book discusses the nature of light Interaction of Light with Matter, the Optical Waveguide, and digital transmission and coding techniques used in decoding optical information.
Abstract: Preface Acknowledgments Introduction FUNDAMENTALS OF LIGHT The Nature of Light Interaction of Light with Matter OPTICAL COMPONENTS The Optical Waveguide: The Fiber Optical Spectral Filters and Gratings Optical Demultiplexers Light Sources Photodetectors Light Amplifiers Other Optical Components Optical Cross-Connects Optical Add-Drop Multiplexers CODING OPTICAL INFORMATION Digital Transmission and Coding Techniques Decoding Optical Information DENSE WAVELENGTH DIVISION MULTIPLEXING DWDM Systems Engineering DWDM Systems DWDM Topologies DWDM CURRENT ISSUES AND RESEARCH State of the Art Acronyms and Abbreviations Answers Index About the Author.
130 citations
TL;DR: In this paper, the authors studied the gain dynamics in quantum-dot (QD) optical amplifiers and found that there are at least three nonlinear processes, which are attributed to carrier relaxation to the ground states, phonon scattering, and carrier capture from the wetting layers into the QDs.
Abstract: Ultrafast gain dynamics in quantum-dot (QD) optical amplifiers has been studied. It was found that there are at least three nonlinear processes, which are attributed to carrier relaxation to the ground states, phonon scattering, and carrier capture from the wetting layers into the QDs. The relevant time constants were evaluated to be /spl sim/90 fs, /spl sim/260 fs, and /spl sim/3 ps, respectively, under a 50-mA bias condition. The dephasing time was evaluated to be /spl sim/85 fs. The third-order optical susceptibility (/spl chi//sup (3)/) has been evaluated by means of both nonlinear transmission and four-wave mixing experiments. The results show that the nonlinearity expressed by /spl chi//sup (3)//g/sub 0/ is quite similar to that of bulk and quantum wells, which can be explained by similar relaxation times. Applications to optical communication devices are also discussed.
129 citations
17 Mar 2001
TL;DR: It is demonstrated the interest of multi-granularity optical networks to decrease the number of ports for the optical switching matrices by grouping some wavelengths into bands and some bands into fibers at some intermediate nodes.
Abstract: We demonstrate the interest of multi-granularity optical networks to decrease the number of ports for the optical switching matrices by grouping some wavelengths into bands and some bands into fibers at some intermediate nodes.
129 citations
06 Mar 2011
TL;DR: A general policy to allocate subcarriers to time-varying traffic in a flexible OFDM optical network is proposed and the OFDM network performance is compared to that of a fixed-grid WDM network using simulations.
Abstract: We propose a general policy to allocate subcarriers to time-varying traffic in a flexible OFDM optical network. We compare the OFDM network performance to that of a fixed-grid WDM network using simulations.
129 citations
TL;DR: This work demonstrates a 4-channel, coarse-WDM demultiplexer with flat passbands of up to 13 nm and an ultra-compact size of 1.2 × 10(-3) mm(2).
Abstract: Wavelength-division-multiplexing (WDM) networks with wide channel grids and bandwidths are promising for low-cost, low-power optical interconnects. Wide-bandwidth, single-band (i.e., no free-spectral range) add-drop filters have been developed on silicon using anti-reflection contra-directional couplers with out-of-phase Bragg gratings. Using such filter components, we demonstrate a 4-channel, coarse-WDM demultiplexer with flat passbands of up to 13 nm and an ultra-compact size of 1.2 × 10−3 mm2.
128 citations