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Relative impact of channel symbol rate on transmission capacity

Journal of Optical Communications and Networking | Gerard T, Semrau D, Sillekens E, Edwards A, Pelouch W, et al | Through C+L band transmission experiments and theoretical modeling, we investigat...

1 April 2020

Relative impact of channel symbol rate on transmission capacity

Abstract


Through C+L band transmission experiments and theoretical modeling, we investigate the impact of channel symbol rate (30, 40, 60, and 85 GBd) on the performance of data center interconnection, metropolitan, and core network distances. Two different transponder architectures are investigated: (a) single-carrier receiver and (b) multi-carrier receiver, where multiple subcarriers are received together in a single wideband receiver. The architectures of both receivers experience a reduction in the achievable information rate as the channel symbol rate increases due to dominating transceiver noise; this holds over all tested transmission distances. However, the multi-carrier receiver shows a weaker performance dependency on symbol rate, as receiver-related impairments dominate. When testing the single-carrier receiver after 630 km, we find that by increasing the channel symbol rate from 40 to 85 GBd, gross capacity decreases by 16%; however, the required number of transceivers to fill the transmission window decreases by 52%. Using the multi-carrier receiver reduces receiver count further. This potentially impacts the cost and complexity of deploying fully loaded transmission systems.

Publication Type:Journal Article
Publication Sub Type:Article
Authors:Gerard T, Semrau D, Sillekens E, Edwards A, Pelouch W, Barnes S, Killey RI, Lavery D, Bayvel P, Galdino L
Publisher:The Optical Society
Publication date:01/04/2020
Pagination:B1 - B8
Journal:Journal of Optical Communications and Networking
Volume:12
Issue:14
Status:Published Online
Print ISSN:1943-0620
DOI:http://dx.doi.org/10.1364/jocn.12.0000b1
Full Text URL:https://discovery.ucl.ac.uk/id/eprint/10092001/

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