Abstract

We propose a new optical transmitter which is capable of changing flexibly the modulation format of the optical signal. By using this transmitter, we can handle and assign various modulation formats: binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), 8-ary quadrature amplitude modulation (8QAM), and 16QAM. The proposed transmitter is based on a combination of a dual-drive Mach-Zehnder modulator (DD-MZM) and a dual-parallel MZM (DP-MZM) with electrical binary drive signals. DD-MZM is a key element to produce the 8QAM and 16QAM formats where each arm of DD-MZM is driven by independent binary data. This is because we can modulate the amplitude and phase of the optical signal by using a frequency chirp of the modulator when we adjust properly the amplitudes of the electrical drive signals. In addition, we show an algorithm by which the proposed transmitter can intelligently select the modulation format in accordance with the signal quality.

© 2012 OSA

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References

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  1. 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]
  2. B. Kozicki, H. Takara, Y. Sone, A. Watanabe, and M. Jinno, “Distance-adaptive spectrum allocation in elastic optical path network (SLICE) with bit per symbol adjustment,” in Proceedings of OFC2010, paper OMU3 (2010).
  3. N. Amaya, M. Irfan, G. Zervas, K. Banias, M. Garrich, I. Henning, D. Simeonidou, Y. R. Zhou, A. Lord, K. Smith, V. J. F. Rancano, S. Liu, P. Petropoulos, and D. J. Richardson, “Gridless optical networking field trial: flexible spectrum switching, degragmentation and transport of 10G/40G/100G/555G over 620-km field fiber,” in Proceedings of ECOC2011, paper Th.13.K.1 (2011).
  4. M. Eiselt, “Flexible optical transport solutions,” in Proceedings of ECOC2010, workshop WS2 (2010).
  5. H. Takara, T. Goh, K. Shibahara, K. Yonenaga, S. Kawai, and M. Jinno, “Experimental demonstration of 400 Gb/s multi-flow, multi-rate, multi-reach optical transmitter for efficient elastic spectrum routing,” in Proceedings of ECOC2011, paper Th.5.A.4 (2011).
  6. R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
    [CrossRef]
  7. Y.-K. Huang, E. Ip, P. N. Ji, Y. Shao, T. Wang, Y. Aono, Y. Yano, and T. Tajima, “Terabit/s optical superchannel with flexble modulation format for dynamic distance/route transmission,” in Proceedings of OFC2012, paper OM3H.4 (2012).
  8. H. Y. Choi, T. Tsuritani, and I. Morita, “Method to generate 112-Gb/s polarization-multiplexed 8QAM signal,” Electron. Lett.48(9), 511–512 (2012).
    [CrossRef]
  9. H. Y. Choi, T. Tsuritani, and I. Morita, “A novel transmitter for 320-Gb/s PDM-RZ-16QAM generation using electrical binary drive signals,” in Proceedings of ECOC2012, paper Tu.4.A.2 (2012).
  10. H. Y. Choi, T. Tsuritani, and I. Morita, “Effects of LN modulator chirp on performance of digital coherent optical transmission system,” in Proceedings of COIN2012, paper TuF.2 (2012).
  11. J. G. Proakis, Digital Communications, 4th ed. (McGraw-Hill, New York, 2001).

2012

H. Y. Choi, T. Tsuritani, and I. Morita, “Method to generate 112-Gb/s polarization-multiplexed 8QAM signal,” Electron. Lett.48(9), 511–512 (2012).
[CrossRef]

2010

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

2009

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]

Becker, J.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Choi, H. Y.

H. Y. Choi, T. Tsuritani, and I. Morita, “Method to generate 112-Gb/s polarization-multiplexed 8QAM signal,” Electron. Lett.48(9), 511–512 (2012).
[CrossRef]

Dreschmann, M.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Freude, W.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Hillerkuss, D.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Huebner, M.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Jinno, M.

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]

Koos, C.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Kozicki, B.

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]

Leuthould, J.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Matsuoka, S.

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]

Meyer, J.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Morita, I.

H. Y. Choi, T. Tsuritani, and I. Morita, “Method to generate 112-Gb/s polarization-multiplexed 8QAM signal,” Electron. Lett.48(9), 511–512 (2012).
[CrossRef]

Nebendahl, B.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Schmogrow, R.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Sone, Y.

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]

Takara, H.

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]

Tsukishima, Y.

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]

Tsuritani, T.

H. Y. Choi, T. Tsuritani, and I. Morita, “Method to generate 112-Gb/s polarization-multiplexed 8QAM signal,” Electron. Lett.48(9), 511–512 (2012).
[CrossRef]

Winter, M.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Electron. Lett.

H. Y. Choi, T. Tsuritani, and I. Morita, “Method to generate 112-Gb/s polarization-multiplexed 8QAM signal,” Electron. Lett.48(9), 511–512 (2012).
[CrossRef]

IEEE Commun. Mag.

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.

R. Schmogrow, D. Hillerkuss, M. Dreschmann, M. Huebner, M. Winter, J. Meyer, B. Nebendahl, C. Koos, J. Becker, W. Freude, and J. Leuthould, “Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd,” IEEE Photon. Technol. Lett.22(21), 1601–1603 (2010).
[CrossRef]

Other

Y.-K. Huang, E. Ip, P. N. Ji, Y. Shao, T. Wang, Y. Aono, Y. Yano, and T. Tajima, “Terabit/s optical superchannel with flexble modulation format for dynamic distance/route transmission,” in Proceedings of OFC2012, paper OM3H.4 (2012).

B. Kozicki, H. Takara, Y. Sone, A. Watanabe, and M. Jinno, “Distance-adaptive spectrum allocation in elastic optical path network (SLICE) with bit per symbol adjustment,” in Proceedings of OFC2010, paper OMU3 (2010).

N. Amaya, M. Irfan, G. Zervas, K. Banias, M. Garrich, I. Henning, D. Simeonidou, Y. R. Zhou, A. Lord, K. Smith, V. J. F. Rancano, S. Liu, P. Petropoulos, and D. J. Richardson, “Gridless optical networking field trial: flexible spectrum switching, degragmentation and transport of 10G/40G/100G/555G over 620-km field fiber,” in Proceedings of ECOC2011, paper Th.13.K.1 (2011).

M. Eiselt, “Flexible optical transport solutions,” in Proceedings of ECOC2010, workshop WS2 (2010).

H. Takara, T. Goh, K. Shibahara, K. Yonenaga, S. Kawai, and M. Jinno, “Experimental demonstration of 400 Gb/s multi-flow, multi-rate, multi-reach optical transmitter for efficient elastic spectrum routing,” in Proceedings of ECOC2011, paper Th.5.A.4 (2011).

H. Y. Choi, T. Tsuritani, and I. Morita, “A novel transmitter for 320-Gb/s PDM-RZ-16QAM generation using electrical binary drive signals,” in Proceedings of ECOC2012, paper Tu.4.A.2 (2012).

H. Y. Choi, T. Tsuritani, and I. Morita, “Effects of LN modulator chirp on performance of digital coherent optical transmission system,” in Proceedings of COIN2012, paper TuF.2 (2012).

J. G. Proakis, Digital Communications, 4th ed. (McGraw-Hill, New York, 2001).

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Figures (7)

Fig. 1
Fig. 1

Configuration of the proposed transmitter.

Fig. 2
Fig. 2

Constellations for 8QAM generation. (a) operation of DD-MZM. (b) output of DD-MZM. (c) output of DP-MZM.

Fig. 3
Fig. 3

Constellations for 16QAM generation. (a) operation of DD-MZM. (b) output of DD-MZM. (c) output of DP-MZM.

Fig. 4
Fig. 4

Flow chart. UT: upper threshold, LT: lower threshold.

Fig. 5
Fig. 5

Experimental setup to evaluate the performance of the proposed transmitter.

Fig. 6
Fig. 6

Measured BER performances and recovered constellations of 12.5-Gbaud RZ-QPSK, RZ-8QAM, and RZ-16QAM. Dashed lines represent the theoretical BER performances for each modulation format.

Fig. 7
Fig. 7

Demonstration of the proposed flexible transmitter.

Tables (1)

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Table 1 Modulation conditions

Equations (1)

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H(t)= 1 2 { exp( jπ A 1 v 1 (t)+jπ v b V π )+exp( jπ A 2 v 2 (t) V π ) }

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