Electronic Postcompensation of Fiber Nonlinearity for 40 Gbit∕s WDM Systems

Nisar Ahmed; M. I. Hayee; Q. Zhang

doi:10.1364/JOCN.2.000456

Journal of Optical Communications and Networking
Vol. 2,
Issue 7,
pp. 456-462
(2010)
•https://doi.org/10.1364/JOCN.2.000456

Electronic Postcompensation of Fiber Nonlinearity for $40 Gbit ∕ s$ WDM Systems

Nisar Ahmed, M. I. Hayee, and Q. Zhang

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Nisar Ahmed, M. I. Hayee, and Q. Zhang, "Electronic Postcompensation of Fiber Nonlinearity for 40 Gbit∕s WDM Systems," J. Opt. Commun. Netw. 2, 456-462 (2010)

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About this Article
History
- Original Manuscript: January 19, 2010
- Revised Manuscript: May 18, 2010
- Manuscript Accepted: May 19, 2010
- Published: June 30, 2010

Abstract

We propose a technique to electronically postcompensate fiber nonlinearity in $⩾ 40 Gbit ∕ s$ long-haul WDM transmission systems. We have analyzed this technique for return-to-zero and carrier-suppressed return-to-zero modulation formats using two different dispersion maps. Our analysis shows that the proposed technique can increase the overall system margin by more than $1.0 dB$ in $40 Gbit ∕ s$ long-haul WDM transmission systems.

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No. of DCs Required	DC 1	DC 2	DC 3	DC 4	DC 5
Neighboring bits	$11 \times 00$	$10 \times 00$	$01 \times 01$	$01 \times 11$	$00 \times 11$
	—	$11 \times 01$	$10 \times 10$	$00 \times 01$	—
	—	$11 \times 10$	$01 \times 10$	$10 \times 11$	—
	—	$01 \times 00$	$00 \times 00$	$00 \times 10$	—
	—	—	$10 \times 01$	—	—
	—	—	$11 \times 11$	—	—

Dispersion Map	Fiber	Loss (dB/km)	Dispersion (ps/nm km)	$A_{eff}$ $(μ m^{2})$	Length (km)
$DSF + SSMF$	DSF	0.25	$- 4.5$	50	80
$DSF + SSMF$	SSMF	0.25	$+ 18$	80	20
$SSMF + DCF$	SSMF	0.25	$+ 18$	80	100
$SSMF + DCF$	DCF	0.50	$- 90$	25	20

No. of DCs Required	DC 1	DC 2	DC 3	DC 4	DC 5
Neighboring bits	$11 \times 00$	$10 \times 00$	$01 \times 01$	$01 \times 11$	$00 \times 11$
	—	$11 \times 01$	$10 \times 10$	$00 \times 01$	—
	—	$11 \times 10$	$01 \times 10$	$10 \times 11$	—
	—	$01 \times 00$	$00 \times 00$	$00 \times 10$	—
	—	—	$10 \times 01$	—	—
	—	—	$11 \times 11$	—	—

Dispersion Map	Fiber	Loss (dB/km)	Dispersion (ps/nm km)	$A_{eff}$ $(μ m^{2})$	Length (km)
$DSF + SSMF$	DSF	0.25	$- 4.5$	50	80
$DSF + SSMF$	SSMF	0.25	$+ 18$	80	20
$SSMF + DCF$	SSMF	0.25	$+ 18$	80	100
$SSMF + DCF$	DCF	0.50	$- 90$	25	20

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