Abstract

We propose a new all-optical signal processing technique to enhance the performance of a return-to-zero optical receiver, which is based on nonlinear temporal pulse broadening and flattening in a normal dispersion fiber and subsequent slicing of the pulse temporal waveform. The potential of the method is demonstrated by application to timing jitter-and noise-limited transmission at 40Gbit/s.

© 2005 Optical Society of America

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References

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  1. B. Bakhshi, P. A. Andrekson, M. Karlsson, and K. Bertilsson, �??Soliton interaction penalty reduction by receiver filtering,�?? IEEE Photon. Technol. Lett. 10, 1042-1044 (1998).
    [CrossRef]
  2. M. Suzuki, H. Toda, A. H. Liang, and A. Hasegawa, �??Improvement of amplitude and phase margins in an RZ optical receiver using Kerr nonlinearity in normal dispersion fiber,�?? IEEE Photon. Technol. Lett. 13, 1248-1250 (2001).
    [CrossRef]
  3. M. Suzuki and H. Toda, �??Q-factor improvement in a jitter limited optical RZ system using nonlinearity of normal dispersion fiber placed at receiver,�?? in Tech. Dig. Optical Fiber Communication Conference (OFC), Anaheim, CA, Paper WH3 (2001).
  4. S. Boscolo and S. K. Turitsyn, �??All-optical nonlinear pulse processing based on normal dispersion-fiber enhanced nonlinear optical loop mirror,�?? IEEE Photon. Technol. Lett. 16, 1912-1914 (2004).
    [CrossRef]
  5. H. Nakatsuka, D. Grischkowsky, and A. C. Balant, �??Nonlinear picosecond-pulse propagating through optical fibers with positive group velocity dispersion,�?? Phys. Rev. Lett. 47, 910-913 (1981).
    [CrossRef]
  6. W. J. Tomlinson, R. H. Stolen, and C. V. Shank, �??Compression of optical pulses chirped by self-phase modulation in fibers,�?? J. Opt. Soc. Am. B 1, 139-149 (1984).
    [CrossRef]
  7. S. Boscolo, S. K. Turitsyn, and K. J. Blow, �??All-optical passive quasi-regeneration in transoceanic 40Gbit/s return-to-zero transmission systems with strong dispersion management,�?? Opt. Commun. 205, 277-280 (2002).
    [CrossRef]
  8. D. Marcuse, �??RMS width of pulses in nonlinear dispersive fibers,�?? J. Lightwave Technol. 10, 17-21 (1992).
    [CrossRef]

IEEE Photon. Technol. Lett.

B. Bakhshi, P. A. Andrekson, M. Karlsson, and K. Bertilsson, �??Soliton interaction penalty reduction by receiver filtering,�?? IEEE Photon. Technol. Lett. 10, 1042-1044 (1998).
[CrossRef]

M. Suzuki, H. Toda, A. H. Liang, and A. Hasegawa, �??Improvement of amplitude and phase margins in an RZ optical receiver using Kerr nonlinearity in normal dispersion fiber,�?? IEEE Photon. Technol. Lett. 13, 1248-1250 (2001).
[CrossRef]

S. Boscolo and S. K. Turitsyn, �??All-optical nonlinear pulse processing based on normal dispersion-fiber enhanced nonlinear optical loop mirror,�?? IEEE Photon. Technol. Lett. 16, 1912-1914 (2004).
[CrossRef]

J. Lightwave Technol.

D. Marcuse, �??RMS width of pulses in nonlinear dispersive fibers,�?? J. Lightwave Technol. 10, 17-21 (1992).
[CrossRef]

J. Opt. Soc. Am. B

OFC 2001

M. Suzuki and H. Toda, �??Q-factor improvement in a jitter limited optical RZ system using nonlinearity of normal dispersion fiber placed at receiver,�?? in Tech. Dig. Optical Fiber Communication Conference (OFC), Anaheim, CA, Paper WH3 (2001).

Opt. Commun.

S. Boscolo, S. K. Turitsyn, and K. J. Blow, �??All-optical passive quasi-regeneration in transoceanic 40Gbit/s return-to-zero transmission systems with strong dispersion management,�?? Opt. Commun. 205, 277-280 (2002).
[CrossRef]

Phys. Rev. Lett.

H. Nakatsuka, D. Grischkowsky, and A. C. Balant, �??Nonlinear picosecond-pulse propagating through optical fibers with positive group velocity dispersion,�?? Phys. Rev. Lett. 47, 910-913 (1981).
[CrossRef]

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Figures (10)

Fig. 1.
Fig. 1.

Schemes of the proposed RZ optical receiver.

Fig. 2.
Fig. 2.

Amplitude modulator transfer function.

Fig. 3.
Fig. 3.

Q-factor versus cut-off frequency of the electrical filter and bandwidth of the optical filter for timing jitter-limited transmission. Top, conventional receiver; bottom, NDF-processed receiver (left) and proposed pulse processor-enhanced receiver (right).

Fig. 4.
Fig. 4.

Eye-diagrams in the receiver for timing jitter-limited transmission.

Fig. 5.
Fig. 5.

Q-factor versus cut-off frequency of the electrical filter and bandwidth of the optical filter for noise-limited transmission. Left, conventional receiver; right, proposed pulse processor-enhanced receiver.

Fig. 6.
Fig. 6.

Eye-diagrams in the receiver for noise-limited transmission.

Fig. 7.
Fig. 7.

Q-factor penalty versus shift from the sampling time for which the Q is maximal.

Fig. 8.
Fig. 8.

Timing jitter reduction factor versus modulation depth parameter x and parameter m.

Fig. 9.
Fig. 9.

Q-factor versus gain of the amplifier.

Fig. 10.
Fig. 10.

Q-factor improvement in the proposed receiver over that in the conventional receiver versus duty cycle of the received pulses. Insets: detected signal eye-diagrams.

Equations (3)

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f ( t ) = x + ( 1 x ) cos 2 m ( π ( t t 0 ) T ) , m = 1,2 ,
Δ t = [ 1 N i = 1 N ( T i t ) 2 ] 1 / 2 ,
t i = T / 2 T / 2 d t t P i ( t ) T / 2 T / 2 d t P i ( t ) , T i = t i P i P tot , t = 1 N i = 1 N T i .

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