Transmission and optical label swapping for 4/spl times/40 gb/s WDM signals deploying orthogonal ASK/DPSK labeling

In this letter, we report a novel amplitude shift keying/differential phase-shift keying (ASK/DPSK) optical packet encoding method that can significantly reduce the crosstalk between the ASK payload and the DPSK label through spectrum shaping. We demonstrate wavelength-division-multiplexing (WDM) transmission for 4/spl times/40 Gb/s labeled return-to-zero signals, including label swapping by Kerr switching of one of the channels, with an overall penalty of 3.3 dB for the payload and 0.3 dB for the label, clearly validating this orthogonal modulation scheme as a potential solution for future ultrahigh-speed Internet protocol-over-WDM networks.

[1]  Colja Schubert,et al.  160 Gbit/s optical 3R-regenerator in a fiber transmission experiment , 2003, OFC 2003 Optical Fiber Communications Conference, 2003..

[2]  B. Schmauss,et al.  All-optical DPSK signal regeneration based on cross-phase modulation , 2004, IEEE Photonics Technology Letters.

[3]  V. Kaman,et al.  All-optical label swapping networks and technologies , 2000, Journal of Lightwave Technology.

[4]  Leonid G. Kazovsky,et al.  Nonlinear cross-talk reduction by spectrum shaping in subcarrier signaling WDM networks , 1998, Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series, Vol.6 (IEEE Cat. No.98CH36178).

[5]  Nan Chi,et al.  Transmission performance of all-optically labelled packets using ASK/DPSK orthogonal modulation , 2002, The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society.

[6]  P. Jeppesen,et al.  Transmission and transparent wavelength conversion of an optically labeled signal using ASK/DPSK orthogonal modulation , 2003, IEEE Photonics Technology Letters.

[7]  Nan Chi,et al.  DC-balanced line encoding for optical labeling scheme using orthogonal modulation , 2004, Optical Fiber Communication Conference, 2004. OFC 2004.

[8]  H. de Waardt,et al.  Optical Labeling of Packets in IP-Over-WDM Networks , 2002, 2002 28TH European Conference on Optical Communication.