Abstract

Discrete multitone (DMT) modulation, due to its water-filling nature, is proposed to enable flexibility in passive optical networks (PONs), optimizing the PON resource usage. The use of DMT signals to directly modulate long-wavelength vertical-cavity surface-emitting lasers (VCSELs) can provide energy-efficient transmitters for 50G PONs. First, we present preliminary experimental measures employing both single-sideband and dual-sideband DMT modulation with already available short-cavity VCSELs operating in the third window to study the PON performance as a function of the accumulated chromatic dispersion and of the received power. The experimental results are then compared with simulations, demonstrating the effectiveness of the developed simulation tool. Then we study the performance of DMT-modulated transmitters based on next-generation short-cavity VCSELs with higher bandwidth (up to 20 GHz) operating in the O-band, evaluating their chromatic dispersion resilience. Finally, considering the statistics of a commercially deployed PON, we demonstrate that DMT modulation, providing link adaptation, offers a significant increase in the total aggregated capacity compared to a single-carrier-based fixed-rate PON, optimizing the PON resource usage with respect to the available power budget and the dispersion impairments.

© 2020 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Strategies for economical next-generation 50G and 100G passive optical networks [Invited]

Doutje van Veen and Vincent Houtsma
J. Opt. Commun. Netw. 12(1) A95-A103 (2020)

DSP enabled next generation 50G TDM-PON

Borui Li, Kuo Zhang, Dechao Zhang, Jiale He, Xiaolong Dong, Qian Liu, and Shengping Li
J. Opt. Commun. Netw. 12(9) D1-D8 (2020)

Flexible coherent UDWDM-PON with dynamic user allocation based on limited-tunability lasers

Josep Segarra, Vicent Sales, Víctor Polo, Jeison Tabares, and Josep Prat
J. Opt. Commun. Netw. 12(9) D27-D35 (2020)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription