Abstract

We experimentally demonstrate all-fiber optical Manchester code generation at 10 Gbit/s using nonlinear polarization rotation in a single 1km highly-nonlinear fiber with the nonlinearity of 20.4 W-1km-1. 33-dB extinction ratio is achieved in a -4-dBm CW dummy channel by co-injecting orthogonally aligned two 8-dBm pumps into the Kerr medium. Our encoder functions with 10 Gbit/s NRZ data stream and 10 GHz optical clock as the pumps. We present the resultant waveform as well as the optical spectrum of the Manchester-coded output.

© 2006 Optical Society of America

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References

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  1. I. Kaminow, T Li, Optical fiber telecommunications Vol. IVB (Academic Press, 2002)
  2. Z. Li, Y. Dong, Y. Wang, C. Lu, "A novel PSK-Manchester modulation format in 10-b/s passive optical network system with high tolerance to beat interference noise," IEEE Photon. Technol. Lett. 17, 1118-1120 (2004).
  3. K. Pahlavan, "Wireless communications for office information networks," IEEE Communications Magazine 23, 19-27 (1985).
    [CrossRef]
  4. L. Sun, J. Takala, "Roles of pulse position modulation on intrachannel nonlinearities affected high-bit-rate optic fiber channel," IEEE International Conference on Communications 3, 1745-1749 (2004).
  5. A. Iwata, H. Sawagashira, T. Sonoda, K. Kamakura, I. Sasase, "Optical CDMA system using embedded transmission method with Manchester signaling," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, Canada, 2, 378-381 (2001).
  6. L. -L. Jau, Y. -H. Lee, "Optical code-division multiplexing systems using Manchester coded Walsh codes," Optoelectronics, IEEE Proceedings of Optoelectronics 151, 81-86 (2004).
  7. T. Ohtsuki, "Performance analysis of atmospheric optical PPM CDMA systems," J. Lightwave Technol. 21, 406-411 (2003).
    [CrossRef]
  8. A. S. Samra, H. A. Harb, "A new coded optical code division multiple access (OCDMA) systems," Proceedings of the 20th National Radio Science Conference, paper C21-1-10 (2003).
  9. K. Murata, T. Otsuji, T. Enoki, Y. Umeda, "Exclusive OR/NOR IC for >40Gbit/s optical transmission systems," Electron. Lett. 16, 764-765 (1998).
    [CrossRef]
  10. J. Zhang, N. Chi, P. V. Holm-Nielsen, C. Peucheret, P. Jeppesen, "Method for high-speed Manchester encoded optical signal generation," Optical Fiber Communication Conference, Los Angeles, United States, paper MF76 (2004).
  11. G. P. Agrawal, Nonlinear fiber optics, 2 (Academic Press, 1995).
  12. C. Yu, L. Christen, T. Luo, Y. Wang, Z. Pan, L. -S. Yan, A. W. Willner, "All-optical XOR gate using polarization rotation in single highly nonlinear fiber," IEEE Photon. Technol. Lett. 17, 1232-1234 (2005).
    [CrossRef]
  13. Z. Pan, Q. Yu, Y. Arieli, A. E. Willner, "The effect of XPM-Induced fast polarization-state fluctuations on PMD compensated WDM systems," IEEE Photon. Technol. Lett. 16, 1963-1965 (2004).
    [CrossRef]

20th Natl. Radio Science Conf., 2003

A. S. Samra, H. A. Harb, "A new coded optical code division multiple access (OCDMA) systems," Proceedings of the 20th National Radio Science Conference, paper C21-1-10 (2003).

Electron. Lett.

K. Murata, T. Otsuji, T. Enoki, Y. Umeda, "Exclusive OR/NOR IC for >40Gbit/s optical transmission systems," Electron. Lett. 16, 764-765 (1998).
[CrossRef]

IEEE Communications Magazine

K. Pahlavan, "Wireless communications for office information networks," IEEE Communications Magazine 23, 19-27 (1985).
[CrossRef]

IEEE Int'l Conf. on Communications, 2004

L. Sun, J. Takala, "Roles of pulse position modulation on intrachannel nonlinearities affected high-bit-rate optic fiber channel," IEEE International Conference on Communications 3, 1745-1749 (2004).

IEEE Pacific Rim Conf. on Comm, 2001

A. Iwata, H. Sawagashira, T. Sonoda, K. Kamakura, I. Sasase, "Optical CDMA system using embedded transmission method with Manchester signaling," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, Canada, 2, 378-381 (2001).

IEEE Photon. Technol. Lett.

Z. Li, Y. Dong, Y. Wang, C. Lu, "A novel PSK-Manchester modulation format in 10-b/s passive optical network system with high tolerance to beat interference noise," IEEE Photon. Technol. Lett. 17, 1118-1120 (2004).

C. Yu, L. Christen, T. Luo, Y. Wang, Z. Pan, L. -S. Yan, A. W. Willner, "All-optical XOR gate using polarization rotation in single highly nonlinear fiber," IEEE Photon. Technol. Lett. 17, 1232-1234 (2005).
[CrossRef]

Z. Pan, Q. Yu, Y. Arieli, A. E. Willner, "The effect of XPM-Induced fast polarization-state fluctuations on PMD compensated WDM systems," IEEE Photon. Technol. Lett. 16, 1963-1965 (2004).
[CrossRef]

IEEE Proc. of Optoelectronics, 2004

L. -L. Jau, Y. -H. Lee, "Optical code-division multiplexing systems using Manchester coded Walsh codes," Optoelectronics, IEEE Proceedings of Optoelectronics 151, 81-86 (2004).

J. Lightwave Technol.

Optical Fiber Comm. Conf., 2004

J. Zhang, N. Chi, P. V. Holm-Nielsen, C. Peucheret, P. Jeppesen, "Method for high-speed Manchester encoded optical signal generation," Optical Fiber Communication Conference, Los Angeles, United States, paper MF76 (2004).

Other

G. P. Agrawal, Nonlinear fiber optics, 2 (Academic Press, 1995).

I. Kaminow, T Li, Optical fiber telecommunications Vol. IVB (Academic Press, 2002)

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Figures (6)

Fig. 1.
Fig. 1.

(a) Operation concept of the all-fiber Manchester code generation, and (b) waveforms of two input pumps (NRZ and Clock) and encoded output (Manchester code). Tb is bit-time.

Fig. 2.
Fig. 2.

Experimental setup

Fig. 3.
Fig. 3.

Demonstration of SOP rotation effect in the dummy channel using two 8-dBm pumps; (a) without pump, (b) with pump-1 only, and (c) with both pump-1 and pump-2.

Fig. 4.
Fig. 4.

Conceptual explanation of “initial on” and “initial off” schemes. Where, PR and ER represent the polarization rotation and the extinction ratio, respectively.

Fig. 5.
Fig. 5.

Extinction ratio of the output with respect to (a) pump-1, and (b) pump-2 when the pump-1 power is fixed to 8 dBm.

Fig. 6.
Fig. 6.

Waveforms of (a) NRZ input, (b) clock input, and (c) Manchester encoded output. (d) Spectrum of the encoded output.

Equations (2)

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T P = sin 2 ( Δ ϕ 2 )
Δ ϕ = 2 π L λ ( Δ n L + n 2 B E P 2 ) = Δ ϕ L + Δ ϕ NL

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