Multi-band OFDM transmission at 100 Gbps with sub-band optical switching

Erwan Pincemin (1) , Mengdi Song (1) , Julie Karaki (2) , Omid Zia-Chahabi (1) , Thierry Guillossou (1) , Didier Grot (1) , Gilles Thouenon (1) , Christophe Betoule (1) , Rémi Clavier (1) , A. Poudoulec (3) , Michiel van Der Keur (3) , Yves Jaouën (4, 5, 6) , Raphaël Le Bidan (7, 2) , Thierry Le Gall (2) , Philippe Gravey (8) , Michel Morvan (8) , Barbara Pilar Dumas Feris (8) , Marie-Laure Moulinard (8) , Gwillerm Froc (9)

1 Orange Labs [Lannion]
2 SC - Département Signal et Communications
3 Yenista Optics (Entreprise)
4 Télécom ParisTech
5 LTCI - Laboratoire Traitement et Communication de l'Information
6 COMELEC - Département Communications & Electronique
7 Lab-STICC_TB_CACS_COM
8 OPT - Département Optique
9 MERCE - Mitsubishi Electric R&D Centre Europe

In this paper, we present an original work on sub- wavelength optical switching performed over a coherent multi- band orthogonal frequency-division multiplexing (MB-OFDM) super-channel operating at 100 Gbps. After having demonstrated that dual-polarization MB-OFDM (DP-MB-OFDM) is as efficient as single-carrier dual-polarization quaternary phase shift keying (DP-QPSK) technology to transport 100 Gbps data-rate over a 10 × 100-km G.652 fiber-based transmission line, we show that opti- cal add-drop of OFDM sub-bands as narrow as 8 GHz inside a 100 Gbps DP-MB-OFDM signal constituted of four sub-bands is fea- sible in the middle of this 1000-km transmission line. The flexible optical add-drop multiplexer (FOADM) implemented here is con- stituted by the association of an ultra-narrow pass-band and stop- band optical filter. The design and realization of such ultra-selective optical filters is presented, while the impact of their physical fea- tures over the quality of transmission is discussed. To prove that several add-drop multiplexers can be cascaded, our FOADM is in- troduced into a G.652 fiber-based recirculating loop and the impact of the cumulated filtering transfer function as well as the crosstalk inside the OADM are investigated. A typical use case for the in- troduction of such FOADM into long-haul transport networks is given, and the capital expenditure (CAPEX) cost advantage for the multi-layer transport networks is highlighted. By the proof of concept delivered here, combination of super-channel and sub- wavelength optical switching pushes network flexibility far away of what is today proposed by system vendors, opening new horizons for an optimized use of multi-layer transport networks.

Mots clés: band-pass filters; light polarisation; OFDM modulation; optical crosstalk; optical filters; quadrature phase shift keying; telecommunication transmission lines

Domaines: Optique / photonique; Traitement du signal et de l'image [eess.SP]

Erwan Pincemin, Mengdi Song, Julie Karaki, Omid Zia-Chahabi, Thierry Guillossou, et al.. Multi-band OFDM transmission at 100 Gbps with sub-band optical switching. Journal of Lightwave Technology, 2014, 32 (12), pp.2202-2219. ⟨10.1109/JLT.2014.2322517⟩. ⟨hal-01190705⟩