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1.	Iglesias Olmedo, Miguel, et al. (author) Impact of carrier induced frequency noise from the transmitter laser on 28 and 56 gbaud DP-QPSK metro links 2014 In: Asia Communications and Photonics Conference, ACP. - Washington, D.C. : OSA - The Optical Society. - 9781557528520 Conference paper (peer-reviewed)abstract We experimentally evaluate the robustness of 28/56 Gbaud DP-QPSK against semiconductor laser frequency noise for cost-efficient 200 Gbps metropolitan links and derive the laser specification guidelines for successful transmission over 500 km SSMF.
2.	Udalcovs, Aleksejs, et al. (author) Power efficiency of WDM networks using various modulation formats with spectral efficiency limited by linear crosstalk 2014 In: Optics Communications. - : Elsevier BV. - 0030-4018 .- 1873-0310. ; 318, s. 31-36 Journal article (peer-reviewed)abstract Small channel spacing in WDM systems offers very good spectral efficiency, but may reduce the transparent optical reach because of interchannel crosstalk. In turn, an increase in the network power consumption can be expected, due to the need for signal regeneration. This paper explores the trade-off between spectral efficiency, transparent optical reach, and power consumption. The results confirm that using the most energy efficient transponder (i.e., in terms of W/bps) does not always guarantee the lowest overall network power consumption. This is especially true over long point-to-point distances (i.e., multiple transmission fiber spans) where, in order to ensure stringent quality of transmission levels together with high spectral efficiency, the optical signal needs to be regenerated many times.

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Type of publication: conference paper (1); journal article (1)

Type of content: peer-reviewed (2)

Author/Editor: Udalcovs, Aleksejs (2); Wosinska, Lena (1); Monti, Paolo (1); Schatz, Richard, 196 ... (1); Schatz, Richard (1); Popov, Sergei (1); show more...; Zibar, D. (1); Monroy, I. T. (1); Bobrovs, V (1); Jacobsen, Gunnar, Pr ... (1); Pang, Xiaodan (1); Iglesias Olmedo, Mig ... (1); show less...

University: Royal Institute of Technology (2); RISE (1)

Language: English (2)

Research subject (UKÄ/SCB): Engineering and Technology (2); Natural sciences (1)

Year: 2014 (2)Undo refine

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