Constant envelope OFDM transmission over metro-regional optical links

Caio M. Santos; Caio M. Santos; Pablo R. N. Marciano; Maria J. Pontes; Marcello E. V. Segatto; Jair A. Lima Silva; Jair A. Lima Silva

doi:10.1364/JOSAB.482523

Journal of the Optical Society of America B
Vol. 40,
Issue 5,
pp. 1331-1339
(2023)
•https://doi.org/10.1364/JOSAB.482523

Constant envelope OFDM transmission over metro-regional optical links

Caio M. Santos, Pablo R. N. Marciano, Maria J. Pontes, Marcello E. V. Segatto, and Jair A. Lima Silva

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Caio M. Santos, Pablo R. N. Marciano, Maria J. Pontes, Marcello E. V. Segatto, and Jair A. Lima Silva, "Constant envelope OFDM transmission over metro-regional optical links," J. Opt. Soc. Am. B 40, 1331-1339 (2023)

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Abstract

The transmission of constant envelope orthogonal frequency division multiplexing (CE-OFDM) signals is experimentally demonstrated in this paper to increase the reach of metro-regional optical links. A recirculating fiber loop was implemented for this aim. A reach extension of 100 km of standard single-mode fiber was achieved with the CE-OFDM-based system, considering 16 quadrature amplitude modulation (16-QAM) as subcarrier mapping and links without optical dispersion compensation. Link lengths as long as 700 km, with spectral efficiency of 1.89 b/s/Hz, were accomplished with performances below the forward error correction limit.

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Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Type	Specified	Measured
Attenuation (dB/km)	$\leq 0.20$	0.18
Dispersion ([ $p s / [n m \cdot k m]$ ])	$\leq 18.0$	-
PMD ( $p s / \sqrt k m$ )	$\leq 0.06$	-
Numerical aperture	0.14	-
Cladding diameter ( $µ m$ )	125.0	-
Core diameter ( $µ m$ )	8.2	-

Parameter	Symbol	Designed
Modulation		16-QAM
Bandwidth (GHz)	$B_{w}$	1.5
FFT size	$N_{F F T}$	512
Useful subcarriers	$N_{c}$	255
Subcarrier spacing (MHz)	$Δ f$	2.93
Symbol sample size	$N_{u}$	512
Cyclic prefix sample size	$N_{g}$	4
Symbol duration (ns)	$T_{u}$	170.7
Guard time (ns)	$T_{g}$	1.3
Preamble duration ( $µ s$ )	$τ_{p r}$	1.70
Signal duration ( $µ s$ )	$τ_{d a t a}$	36.1

Type	Specified	Measured
Attenuation (dB/km)	$\leq 0.20$	0.18
Dispersion ([ $p s / [n m \cdot k m]$ ])	$\leq 18.0$	-
PMD ( $p s / \sqrt k m$ )	$\leq 0.06$	-
Numerical aperture	0.14	-
Cladding diameter ( $µ m$ )	125.0	-
Core diameter ( $µ m$ )	8.2	-

Parameter	Symbol	Designed
Modulation		16-QAM
Bandwidth (GHz)	$B_{w}$	1.5
FFT size	$N_{F F T}$	512
Useful subcarriers	$N_{c}$	255
Subcarrier spacing (MHz)	$Δ f$	2.93
Symbol sample size	$N_{u}$	512
Cyclic prefix sample size	$N_{g}$	4
Symbol duration (ns)	$T_{u}$	170.7
Guard time (ns)	$T_{g}$	1.3
Preamble duration ( $µ s$ )	$τ_{p r}$	1.70
Signal duration ( $µ s$ )	$τ_{d a t a}$	36.1

Pablo R. N. Marciano	https://orcid.org/0000-0001-8333-8012
Maria J. Pontes	https://orcid.org/0000-0002-9009-2425
Marcello E. V. Segatto	https://orcid.org/0000-0003-4083-992X

Abstract

Data availability

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Figures (13)

Tables (2)

Equations (7)

Journal of the Optical Society of America B