We demonstrate a spectrally efficient digital subcarrier multiplexed (DSCM) coherent optical system for optical transport network. In the proposed system, mutually orthogonal subcarrier channels are digitally generated, which allows a high degree of flexibility in bandwidth allocation and scalability in data rate granularity. The receiver can also dynamically change the number of DSCM channels for detection without changing the system configuration. We experimentally investigate the transmission performance of a 22.2Gb/s DSCM system with 10 subcarrier channels using QPSK modulation. The impacts of channel spacing and time mismatch between subcarrier channels are also explored.

© 2011 OSA

1. S. J. B. Yoo, “Optical packet and burst switching technologies for the future photonic Internet,” J. Lightwave Technol.24(12), 4468–4492 (2006). [CrossRef]
2. M. Tomizawa, J. Yamawaku, Y. Takigawa, M. Koga, Y. Miyamoto, T. Morioka, and K. Hagimoto, “Terabit LAN with optical virtual concatenation for Grid applications with super-computers,” in Optical Fiber Communication Conference (OFC), 2005), OThG6.
3. X. J. Cao, V. Anand, and C. M. Qiao, “Waveband switching in optical networks,” IEEE Commun. Mag.41(4), 105–112 (2003). [CrossRef]
4. M. Jinno, H. Takara, B. Kozicki, Y. Tsukishima, Y. Sone, and S. Matsuoka, “Spectrum-Efficient and Scalable Elastic Optical Path Network: Architecture, Benefits, and Enabling Technologies,” IEEE Commun. Mag.47(11), 66–73 (2009). [CrossRef]
5. K. Christodoulopoulos, I. Tomkos, and E. A. Varvarigos, “Elastic Bandwidth Allocation in Flexible OFDM-Based Optical Networks,” J. Lightwave Technol.29(9), 1354–1366 (2011). [CrossRef]
6. A. J. Lowery and J. Armstrong, “Orthogonal-frequency-division multiplexing for dispersion compensation of long-haul optical systems,” Opt. Express14(6), 2079–2084 (2006). [CrossRef] [PubMed]
7. A. F. Molisch, Wireless Communications (Wiley, 2011).
8. T. Kobayashi, A. Sano, E. Yamada, E. Yoshida, and Y. Miyamoto, “Over 100 Gb/s Electro-Optically Multiplexed OFDM for High-Capacity Optical Transport Network,” J. Lightwave Technol.27(16), 3714–3720 (2009). [CrossRef]
9. B. Kozicki, H. Takara, Y. Tsukishima, T. Yoshimatsu, K. Yonenaga, and M. Jinno, “Experimental demonstration of spectrum-sliced elastic optical path network (SLICE),” Opt. Express18(21), 22105–22118 (2010). [CrossRef] [PubMed]
10. Y. Y. Zhang, M. O’Sullivan, and R. Q. Hui, “Theoretical and experimental investigation of compatible SSB modulation for single channel long-distance optical OFDM transmission,” Opt. Express18(16), 16751–16764 (2010). [CrossRef] [PubMed]
11. K. Roberts, C. Li, L. Strawczynski, M. O’Sullivan, and I. Hardcastle, “Electronic pre-compensation of optical nonlinearity,” IEEE Photon. Technol. Lett.18(2), 403–405 (2006). [CrossRef]
12. Y. R. Ma, Q. Yang, Y. Tang, S. M. Chen, and W. Shieh, “1-Tb/s single-channel coherent optical OFDM transmission over 600-km SSMF fiber with subwavelength bandwidth access,” Opt. Express17(11), 9421–9427 (2009). [CrossRef] [PubMed]
13. W. Shieh, H. Bao, and Y. Tang, “Coherent optical OFDM: theory and design,” Opt. Express16(2), 841–859 (2008). [CrossRef] [PubMed]
14. A. J. Viterbi and A. M. Viterbi, “Non-linear estimation of PSK-modulated carrier phase with application to burst digital transmission,” IEEE Trans. Inf. Theory29(4), 543–551 (1983). [CrossRef]
15. R. Q. Hui, B. Y. Zhu, R. X. Huang, C. T. Allen, K. R. Demarest, and D. Richards, “Subcarrier multiplexing for high-speed optical transmission,” J. Lightwave Technol.20(3), 417–427 (2002). [CrossRef]
16. G. Bosco, A. Carena, V. Curri, P. Poggiolini, and F. Forghieri, “Performance Limites of Nyquist-WDM and CO-OFDM in High-Speed PM-QPSK Systems,” IEEE Photon. Technol. Lett.22(15), 1129–1131 (2010). [CrossRef]
17. S. Chandrasekhar and X. Liu, “Experimental investigation on the performance of closely spaced multi-carrier PDM-QPSK with digital coherent detection,” Opt. Express17(24), 21350–21361 (2009). [CrossRef] [PubMed]
18. X. Liu, X. Wei, S. Chandrasekhar, and A. H. Gnauck, “Increased OSNR gains of forward-error correction in nonlinear optical transmissions,” IEEE Photon. Technol. Lett.15(7), 999–1001 (2003). [CrossRef]

IEEE Commun. Mag.

• X. J. Cao, V. Anand, and C. M. Qiao, “Waveband switching in optical networks,” IEEE Commun. Mag.41(4), 105–112 (2003). [CrossRef]
• M. Jinno, H. Takara, B. Kozicki, Y. Tsukishima, Y. Sone, and S. Matsuoka, “Spectrum-Efficient and Scalable Elastic Optical Path Network: Architecture, Benefits, and Enabling Technologies,” IEEE Commun. Mag.47(11), 66–73 (2009). [CrossRef]

IEEE Photon. Technol. Lett.

• K. Roberts, C. Li, L. Strawczynski, M. O’Sullivan, and I. Hardcastle, “Electronic pre-compensation of optical nonlinearity,” IEEE Photon. Technol. Lett.18(2), 403–405 (2006). [CrossRef]
• G. Bosco, A. Carena, V. Curri, P. Poggiolini, and F. Forghieri, “Performance Limites of Nyquist-WDM and CO-OFDM in High-Speed PM-QPSK Systems,” IEEE Photon. Technol. Lett.22(15), 1129–1131 (2010). [CrossRef]
• X. Liu, X. Wei, S. Chandrasekhar, and A. H. Gnauck, “Increased OSNR gains of forward-error correction in nonlinear optical transmissions,” IEEE Photon. Technol. Lett.15(7), 999–1001 (2003). [CrossRef]

IEEE Trans. Inf. Theory

• A. J. Viterbi and A. M. Viterbi, “Non-linear estimation of PSK-modulated carrier phase with application to burst digital transmission,” IEEE Trans. Inf. Theory29(4), 543–551 (1983). [CrossRef]

J. Lightwave Technol.

• R. Q. Hui, B. Y. Zhu, R. X. Huang, C. T. Allen, K. R. Demarest, and D. Richards, “Subcarrier multiplexing for high-speed optical transmission,” J. Lightwave Technol.20(3), 417–427 (2002). [CrossRef]
• K. Christodoulopoulos, I. Tomkos, and E. A. Varvarigos, “Elastic Bandwidth Allocation in Flexible OFDM-Based Optical Networks,” J. Lightwave Technol.29(9), 1354–1366 (2011). [CrossRef]
• S. J. B. Yoo, “Optical packet and burst switching technologies for the future photonic Internet,” J. Lightwave Technol.24(12), 4468–4492 (2006). [CrossRef]
• T. Kobayashi, A. Sano, E. Yamada, E. Yoshida, and Y. Miyamoto, “Over 100 Gb/s Electro-Optically Multiplexed OFDM for High-Capacity Optical Transport Network,” J. Lightwave Technol.27(16), 3714–3720 (2009). [CrossRef]

Opt. Express

• B. Kozicki, H. Takara, Y. Tsukishima, T. Yoshimatsu, K. Yonenaga, and M. Jinno, “Experimental demonstration of spectrum-sliced elastic optical path network (SLICE),” Opt. Express18(21), 22105–22118 (2010). [CrossRef] [PubMed]
• Y. Y. Zhang, M. O’Sullivan, and R. Q. Hui, “Theoretical and experimental investigation of compatible SSB modulation for single channel long-distance optical OFDM transmission,” Opt. Express18(16), 16751–16764 (2010). [CrossRef] [PubMed]
• A. J. Lowery and J. Armstrong, “Orthogonal-frequency-division multiplexing for dispersion compensation of long-haul optical systems,” Opt. Express14(6), 2079–2084 (2006). [CrossRef] [PubMed]
• Y. R. Ma, Q. Yang, Y. Tang, S. M. Chen, and W. Shieh, “1-Tb/s single-channel coherent optical OFDM transmission over 600-km SSMF fiber with subwavelength bandwidth access,” Opt. Express17(11), 9421–9427 (2009). [CrossRef] [PubMed]
• W. Shieh, H. Bao, and Y. Tang, “Coherent optical OFDM: theory and design,” Opt. Express16(2), 841–859 (2008). [CrossRef] [PubMed]
• S. Chandrasekhar and X. Liu, “Experimental investigation on the performance of closely spaced multi-carrier PDM-QPSK with digital coherent detection,” Opt. Express17(24), 21350–21361 (2009). [CrossRef] [PubMed]

Other

• A. F. Molisch, Wireless Communications (Wiley, 2011).
• M. Tomizawa, J. Yamawaku, Y. Takigawa, M. Koga, Y. Miyamoto, T. Morioka, and K. Hagimoto, “Terabit LAN with optical virtual concatenation for Grid applications with super-computers,” in Optical Fiber Communication Conference (OFC), 2005), OThG6.

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