Introduction to Optical Networks

Ramaswami, Rajiv; Sivarajan, Kumar N.; Sasaki, Galen H.

doi:10.1016/b978-0-12-374092-2.50009-6

Cited by 46 publications

(117 citation statements)

References 19 publications

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“…We use wavelength divisional multiplexing to combine the data and quantum signals on a single fibre pair, with all forward directed traffic in the first fibre and the backward directed traffic in the second. This follows the usual practice of using a pair of fibres for bi-directional communication 17 . As well as conforming to the standard approach, this helps reduce noise on the quantum channel for fibre distances greater than about 25 km as Raman scattering due to strong data signals in the forward direction weakens due to fibre attenuation 8 .…”

mentioning

confidence: 99%

Ultra-high bandwidth quantum secured data transmission

Dynes

Tam

Plews

et al. 2016

Sci Rep

110

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Quantum key distribution (QKD) provides an attractive means for securing communications in optical fibre networks. However, deployment of the technology has been hampered by the frequent need for dedicated dark fibres to segregate the very weak quantum signals from conventional traffic. Up until now the coexistence of QKD with data has been limited to bandwidths that are orders of magnitude below those commonly employed in fibre optic communication networks. Using an optimised wavelength divisional multiplexing scheme, we transport QKD and the prevalent 100 Gb/s data format in the forward direction over the same fibre for the first time. We show a full quantum encryption system operating with a bandwidth of 200 Gb/s over a 100 km fibre. Exploring the ultimate limits of the technology by experimental measurements of the Raman noise, we demonstrate it is feasible to combine QKD with 10 Tb/s of data over a 50 km link. These results suggest it will be possible to integrate QKD and other quantum photonic technologies into high bandwidth data communication infrastructures, thereby allowing their widespread deployment.

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mentioning

confidence: 99%

Ultra-high bandwidth quantum secured data transmission

Dynes

Tam

Plews

et al. 2016

Sci Rep

110

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“…Photonic Integrated Circuit (PIC) is essential for integrated optical systems, and thus plays a key role in broad applications. In a PIC, the control of waveguide’s chromatic dispersion is of central importance in most of applications, which significantly influences the propagation of light field and the generation of various nonlinearity effects [ 1 ]. Waveguides with agile shapes of dispersion profiles could potentially constitute various functional devices.…”

Section: Introductionmentioning

confidence: 99%

Efficient Design for Integrated Photonic Waveguides with Agile Dispersion

Wang

Shen

et al. 2021

Sensors

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Chromatic dispersion engineering of photonic waveguide is of great importance for Photonic Integrated Circuit in broad applications, including on-chip CD compensation, supercontinuum generation, Kerr-comb generation, micro resonator and mode-locked laser. Linear propagation behavior and nonlinear effects of the light wave can be manipulated by engineering CD, in order to manipulate the temporal shape and frequency spectrum. Therefore, agile shapes of dispersion profiles, including typically wideband flat dispersion, are highly desired among various applications. In this study, we demonstrate a novel method for agile dispersion engineering of integrated photonic waveguide. Based on a horizontal double-slot structure, we obtained agile dispersion shapes, including broadband low dispersion, constant dispersion and slope-maintained linear dispersion. The proposed inverse design method is objectively-motivated and automation-supported. Dispersion in the range of 0–1.5 ps/(nm·km) for 861-nm bandwidth has been achieved, which shows superior performance for broadband low dispersion. Numerical simulation of the Kerr frequency comb was carried out utilizing the obtained dispersion shapes and a comb spectrum for 1068-nm bandwidth with a 20-dB power variation was generated. Significant potential for integrated photonic design automation can be expected.

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“…In WDM optical networks, transparent optical cross-connects (OXCs) are used in order to provide efficient space and wavelength switching functions [2]. An OXC takes as input signals at multiple wavelengths and some of these wavelengths can be dropped locally, while others pass through by switching them to the appropriate output ports.…”

Section: Introductionmentioning

confidence: 99%

Multi-Period Attack-Aware Optical Network Planning under Demand Uncertainty

Manousakis¹,

Kolios²,

Ellinas³

2017

Optical Fiber and Wireless Communications

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In this chapter, novel attack-aware routing and wavelength assignment (Aa-RWA) algorithms for multiperiod network planning are proposed. The considered physical layer attacks addressed in this chapter are high-power jamming attacks. These attacks are modeled as interactions among lightpaths as a result of intra-channel and/or inter-channel crosstalk. The proposed Aa-RWA algorithm first solves the problem for given traffic demands, and subsequently, the algorithm is enhanced in order to deal with demands under uncertainties. The demand uncertainty is considered in order to provide a solution for several periods, where the knowledge of demands for future periods can only be estimated. The objective of the Aa-RWA algorithm is to minimize the impact of possible physical layer attacks and at the same time minimize the investment cost (in terms of switching equipment deployed) during the network planning phase.

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Introduction to Optical Networks

Cited by 46 publications

References 19 publications

Ultra-high bandwidth quantum secured data transmission

Ultra-high bandwidth quantum secured data transmission

Efficient Design for Integrated Photonic Waveguides with Agile Dispersion

Multi-Period Attack-Aware Optical Network Planning under Demand Uncertainty

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