Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Articles Article Faculty Publications -Articles Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Spectral and power efficiency investigation in single- and multi-line-rate optical wavelength division multiplexed (WDM) networks Subject The topic of the resource Mixed-line rate; Power efficiency; Quality of transmission; Single-line rate; Spectral efficiency; Sub-band spacing Description An account of the resource In order to tackle the increasing heterogeneous global Internet traffic, mixed-line-rate (MLR) optical wavelength division multiplexed (WDM) networks have emerged as the cost- and power-efficient solution. In MLR WDM networks, channels are structured as sub-bands, each of which consists of wavelengths operating at a similar data rate. By reducing the (1) spacing within a sub-band, or (2) spacing between sub-bands operating at different data rates, spectral efficiency can be improved. However, owing to high physical layer impairment levels, decrease in sub-band spacing adversely affects transmission reach of the channels, which results in higher power consumption due to requirement of increased signal regeneration. In this work, we compare power efficiency of various MLR and single-line-rate (SLR) solutions, and also investigate the trade-off that exists between spectral and power efficiency in a WDM network. Simulation results indicate that (1) for high transmission capacities, a combination of 100Gbps transponders and 40Gbps regenerators will obtain the highest power efficiency; (2) for long connection distances, a point ofmerging occurs for various SLR and MLR designs, where power consumption is independent of the frequency band distribution; and (3) for MLR systems, both spectral and power efficiency can be improved by using either shorter links with higher bandwidth assignment to 100Gbps wavelengths, or longer links with higher bandwidth assignment to 40Gbps wavelengths. Finally, the results indicate that focusing on spectral efficiency alone results in extra power consumption, since high quality of transmission and spectral efficiency leads to increased regeneration. 2016, Springer Science+Business Media New York. Creator An entity primarily responsible for making the resource Iyer S.; Singh S.P. Source A related resource from which the described resource is derived Photonic Network Communications, Vol-33, No. 1, pp. 39-51. Publisher An entity responsible for making the resource available Springer New York LLC Date A point or period of time associated with an event in the lifecycle of the resource 2017-01-01 Identifier An unambiguous reference to the resource within a given context <a href="https://doi.org/10.1007/s11107-016-0618-3" target="_blank" rel="noreferrer noopener">https://doi.org/10.1007/s11107-016-0618-3</a> <br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960387828&amp;doi=10.1007%2Fs11107-016-0618-3&amp;partnerID=40&amp;md5=4de858d02bd8b2030551975f28562477" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960387828&amp;doi=10.1007%2fs11107-016-0618-3&amp;partnerID=40&amp;md5=4de858d02bd8b2030551975f28562477</a> Rights Information about rights held in and over the resource Restricted Access Relation A related resource ISSN: 1387974X Format The file format, physical medium, or dimensions of the resource Online Language A language of the resource English Type The nature or genre of the resource Article Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Iyer S., Department of Electronics and Communication Engineering, Christ University Faculty of Engineering, Mysore Road, Bangalore, 560060, India; Singh S.P., Division of ECE, Netaji Subhas Institute of Technology, Azad Hind Fauj Marg, Sector-3, Dwarka, New Delhi, 110078, India