Abstract

We demonstrate simultaneous NRZ-to-RZ conversion for 16 DWDM channels, using a single SOA and a subsequent delay interferometer (DI) acting as a comb-like filter to control the obtained pulse-width for all of the channels. The SOA is operated in deep saturation, resulting in weak cross gain modulation and cross phase modulation induced crosstalk between different NRZ channels. By adjusting the detuning between the peaks in the DI spectrum and each corresponding carrier, good quality RZ signals with different duty cycles can be achieved. Bit-error-rate measurements show negative power penalties for the obtained RZ signals with different duty cycles. Significant timing jitter reductions for all channels show the good regenerative performance of the proposed converter.

© 2008 Optical Society of America

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References

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  1. G. R. Lin, K. C. Yu, and Y. C. Chang, "10 Gbit/s all-optical non-return to zero-return-to-zero data format conversion based on a backward dark-optical-comb injected semiconductor optical amplifier," Opt. Lett. 31, 1376-1378 (2006).
    [CrossRef] [PubMed]
  2. L.  Xu, B. C.  Wang, V.  Baby, and I.  Glesk, "All-optical data format conversion between RZ and NRZ based on a Mach-Zehnder Interferometric Wavelength Converter," IEEE Photon. Technol. Lett.  15, 308-310 (2003).
    [CrossRef]
  3. J. Wang, J. Sun, Q. Sun, D. Wang, and D. Huang, "Proposal and simulation of all-optical NRZ-to-RZ format conversion using cascaded sum- and difference-frequency generation," Opt. Express 15, 583-588 (2007).
    [CrossRef] [PubMed]
  4. X. Yang, A. K. Mishra, R. J. Manning, R. P. Webb, and A. D. Ellis, "All-optical 42.6 Gbit/s NRZ to RZ format conversion by cross-phase modulation in single SOA,"Electro. Lett. 43, 890 - 892 (2007).
    [CrossRef]
  5. C. H. Kwok and C. Lin, "Polarization-insensitive all-optical NRZ-to-RZ format conversion by spectral filtering of a cross phase modulation broadened signal spectrum," IEEE J. Sel. Top. Quantum Electron. 12,451-458 (2006).
    [CrossRef]
  6. L. Noel, X. Shan, and A. D. Ellis, "Four WDM channel NRZ to RZ format conversion using a single semiconductor laser amplifier," Electro. Lett.,  31,277-278 (1995).
    [CrossRef]
  7. J. Lasri, P. Devgan, V. S. Grigoryan, and P. Kumar, "Multiwavelength NRZ-to-RZ conversion with timing-jitter suppression," in Conference on Lasers and Electro-optics, CLEO???04 (Optical Society of America, 2004), paper CFG2.
  8. M. L. Nielsen, B. Lavigne, and B. Dagens, "Polarity-preserving SOA-based wavelength conversion at 40 Gbit/s using bandpass filtering," Electro. Lett.,  39, 1334-1335 (2003).
    [CrossRef]
  9. Y. Yu, X. Zhang, E. Zhou, and D. Huang, "All-Optical Clock Recovery From NRZ Signals at Different Bit Rates via Preprocessing by an Optical Filter," IEEE Photon. Technol. Lett.  19, 2039-2041 (2007).
    [CrossRef]

2007 (3)

X. Yang, A. K. Mishra, R. J. Manning, R. P. Webb, and A. D. Ellis, "All-optical 42.6 Gbit/s NRZ to RZ format conversion by cross-phase modulation in single SOA,"Electro. Lett. 43, 890 - 892 (2007).
[CrossRef]

Y. Yu, X. Zhang, E. Zhou, and D. Huang, "All-Optical Clock Recovery From NRZ Signals at Different Bit Rates via Preprocessing by an Optical Filter," IEEE Photon. Technol. Lett.  19, 2039-2041 (2007).
[CrossRef]

J. Wang, J. Sun, Q. Sun, D. Wang, and D. Huang, "Proposal and simulation of all-optical NRZ-to-RZ format conversion using cascaded sum- and difference-frequency generation," Opt. Express 15, 583-588 (2007).
[CrossRef] [PubMed]

2006 (2)

G. R. Lin, K. C. Yu, and Y. C. Chang, "10 Gbit/s all-optical non-return to zero-return-to-zero data format conversion based on a backward dark-optical-comb injected semiconductor optical amplifier," Opt. Lett. 31, 1376-1378 (2006).
[CrossRef] [PubMed]

C. H. Kwok and C. Lin, "Polarization-insensitive all-optical NRZ-to-RZ format conversion by spectral filtering of a cross phase modulation broadened signal spectrum," IEEE J. Sel. Top. Quantum Electron. 12,451-458 (2006).
[CrossRef]

2003 (2)

L.  Xu, B. C.  Wang, V.  Baby, and I.  Glesk, "All-optical data format conversion between RZ and NRZ based on a Mach-Zehnder Interferometric Wavelength Converter," IEEE Photon. Technol. Lett.  15, 308-310 (2003).
[CrossRef]

M. L. Nielsen, B. Lavigne, and B. Dagens, "Polarity-preserving SOA-based wavelength conversion at 40 Gbit/s using bandpass filtering," Electro. Lett.,  39, 1334-1335 (2003).
[CrossRef]

1995 (1)

L. Noel, X. Shan, and A. D. Ellis, "Four WDM channel NRZ to RZ format conversion using a single semiconductor laser amplifier," Electro. Lett.,  31,277-278 (1995).
[CrossRef]

Baby, V.

L.  Xu, B. C.  Wang, V.  Baby, and I.  Glesk, "All-optical data format conversion between RZ and NRZ based on a Mach-Zehnder Interferometric Wavelength Converter," IEEE Photon. Technol. Lett.  15, 308-310 (2003).
[CrossRef]

Chang, Y. C.

Dagens, B.

M. L. Nielsen, B. Lavigne, and B. Dagens, "Polarity-preserving SOA-based wavelength conversion at 40 Gbit/s using bandpass filtering," Electro. Lett.,  39, 1334-1335 (2003).
[CrossRef]

Ellis, A. D.

L. Noel, X. Shan, and A. D. Ellis, "Four WDM channel NRZ to RZ format conversion using a single semiconductor laser amplifier," Electro. Lett.,  31,277-278 (1995).
[CrossRef]

Ellis, R.P.

X. Yang, A. K. Mishra, R. J. Manning, R. P. Webb, and A. D. Ellis, "All-optical 42.6 Gbit/s NRZ to RZ format conversion by cross-phase modulation in single SOA,"Electro. Lett. 43, 890 - 892 (2007).
[CrossRef]

Glesk, I.

L.  Xu, B. C.  Wang, V.  Baby, and I.  Glesk, "All-optical data format conversion between RZ and NRZ based on a Mach-Zehnder Interferometric Wavelength Converter," IEEE Photon. Technol. Lett.  15, 308-310 (2003).
[CrossRef]

Huang, D.

Y. Yu, X. Zhang, E. Zhou, and D. Huang, "All-Optical Clock Recovery From NRZ Signals at Different Bit Rates via Preprocessing by an Optical Filter," IEEE Photon. Technol. Lett.  19, 2039-2041 (2007).
[CrossRef]

J. Wang, J. Sun, Q. Sun, D. Wang, and D. Huang, "Proposal and simulation of all-optical NRZ-to-RZ format conversion using cascaded sum- and difference-frequency generation," Opt. Express 15, 583-588 (2007).
[CrossRef] [PubMed]

Kwok, C. H.

C. H. Kwok and C. Lin, "Polarization-insensitive all-optical NRZ-to-RZ format conversion by spectral filtering of a cross phase modulation broadened signal spectrum," IEEE J. Sel. Top. Quantum Electron. 12,451-458 (2006).
[CrossRef]

Lavigne, B.

M. L. Nielsen, B. Lavigne, and B. Dagens, "Polarity-preserving SOA-based wavelength conversion at 40 Gbit/s using bandpass filtering," Electro. Lett.,  39, 1334-1335 (2003).
[CrossRef]

Lin, C.

C. H. Kwok and C. Lin, "Polarization-insensitive all-optical NRZ-to-RZ format conversion by spectral filtering of a cross phase modulation broadened signal spectrum," IEEE J. Sel. Top. Quantum Electron. 12,451-458 (2006).
[CrossRef]

Lin, G. R.

Manning, A.K.

X. Yang, A. K. Mishra, R. J. Manning, R. P. Webb, and A. D. Ellis, "All-optical 42.6 Gbit/s NRZ to RZ format conversion by cross-phase modulation in single SOA,"Electro. Lett. 43, 890 - 892 (2007).
[CrossRef]

Mishra, X.

X. Yang, A. K. Mishra, R. J. Manning, R. P. Webb, and A. D. Ellis, "All-optical 42.6 Gbit/s NRZ to RZ format conversion by cross-phase modulation in single SOA,"Electro. Lett. 43, 890 - 892 (2007).
[CrossRef]

Nielsen, M. L.

M. L. Nielsen, B. Lavigne, and B. Dagens, "Polarity-preserving SOA-based wavelength conversion at 40 Gbit/s using bandpass filtering," Electro. Lett.,  39, 1334-1335 (2003).
[CrossRef]

Noel, L.

L. Noel, X. Shan, and A. D. Ellis, "Four WDM channel NRZ to RZ format conversion using a single semiconductor laser amplifier," Electro. Lett.,  31,277-278 (1995).
[CrossRef]

Shan, X.

L. Noel, X. Shan, and A. D. Ellis, "Four WDM channel NRZ to RZ format conversion using a single semiconductor laser amplifier," Electro. Lett.,  31,277-278 (1995).
[CrossRef]

Sun, J.

Sun, Q.

Wang, B. C.

L.  Xu, B. C.  Wang, V.  Baby, and I.  Glesk, "All-optical data format conversion between RZ and NRZ based on a Mach-Zehnder Interferometric Wavelength Converter," IEEE Photon. Technol. Lett.  15, 308-310 (2003).
[CrossRef]

Wang, D.

Wang, J.

Webb, R.J.

X. Yang, A. K. Mishra, R. J. Manning, R. P. Webb, and A. D. Ellis, "All-optical 42.6 Gbit/s NRZ to RZ format conversion by cross-phase modulation in single SOA,"Electro. Lett. 43, 890 - 892 (2007).
[CrossRef]

Xu, L.

L.  Xu, B. C.  Wang, V.  Baby, and I.  Glesk, "All-optical data format conversion between RZ and NRZ based on a Mach-Zehnder Interferometric Wavelength Converter," IEEE Photon. Technol. Lett.  15, 308-310 (2003).
[CrossRef]

Yang,

X. Yang, A. K. Mishra, R. J. Manning, R. P. Webb, and A. D. Ellis, "All-optical 42.6 Gbit/s NRZ to RZ format conversion by cross-phase modulation in single SOA,"Electro. Lett. 43, 890 - 892 (2007).
[CrossRef]

Yu, K. C.

Yu, Y.

Y. Yu, X. Zhang, E. Zhou, and D. Huang, "All-Optical Clock Recovery From NRZ Signals at Different Bit Rates via Preprocessing by an Optical Filter," IEEE Photon. Technol. Lett.  19, 2039-2041 (2007).
[CrossRef]

Zhang, X.

Y. Yu, X. Zhang, E. Zhou, and D. Huang, "All-Optical Clock Recovery From NRZ Signals at Different Bit Rates via Preprocessing by an Optical Filter," IEEE Photon. Technol. Lett.  19, 2039-2041 (2007).
[CrossRef]

Zhou, E.

Y. Yu, X. Zhang, E. Zhou, and D. Huang, "All-Optical Clock Recovery From NRZ Signals at Different Bit Rates via Preprocessing by an Optical Filter," IEEE Photon. Technol. Lett.  19, 2039-2041 (2007).
[CrossRef]

Electro. Lett. (3)

X. Yang, A. K. Mishra, R. J. Manning, R. P. Webb, and A. D. Ellis, "All-optical 42.6 Gbit/s NRZ to RZ format conversion by cross-phase modulation in single SOA,"Electro. Lett. 43, 890 - 892 (2007).
[CrossRef]

L. Noel, X. Shan, and A. D. Ellis, "Four WDM channel NRZ to RZ format conversion using a single semiconductor laser amplifier," Electro. Lett.,  31,277-278 (1995).
[CrossRef]

M. L. Nielsen, B. Lavigne, and B. Dagens, "Polarity-preserving SOA-based wavelength conversion at 40 Gbit/s using bandpass filtering," Electro. Lett.,  39, 1334-1335 (2003).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron. (1)

C. H. Kwok and C. Lin, "Polarization-insensitive all-optical NRZ-to-RZ format conversion by spectral filtering of a cross phase modulation broadened signal spectrum," IEEE J. Sel. Top. Quantum Electron. 12,451-458 (2006).
[CrossRef]

IEEE Photon. Technol. Lett. (2)

Y. Yu, X. Zhang, E. Zhou, and D. Huang, "All-Optical Clock Recovery From NRZ Signals at Different Bit Rates via Preprocessing by an Optical Filter," IEEE Photon. Technol. Lett.  19, 2039-2041 (2007).
[CrossRef]

L.  Xu, B. C.  Wang, V.  Baby, and I.  Glesk, "All-optical data format conversion between RZ and NRZ based on a Mach-Zehnder Interferometric Wavelength Converter," IEEE Photon. Technol. Lett.  15, 308-310 (2003).
[CrossRef]

Opt. Express (1)

Opt. Lett. (1)

Other (1)

J. Lasri, P. Devgan, V. S. Grigoryan, and P. Kumar, "Multiwavelength NRZ-to-RZ conversion with timing-jitter suppression," in Conference on Lasers and Electro-optics, CLEO???04 (Optical Society of America, 2004), paper CFG2.

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Figures (7)

Fig. 1.
Fig. 1.

Operation principle of the multi-channel format conversions

Fig. 2.
Fig. 2.

simulated results for different clock power and different filter detuning

Fig. 3.
Fig. 3.

Experimental setup

Fig. 4.
Fig. 4.

Spectra of 16 DWDM channels (a) before SOA (b) after SOA (c) after DI and (d) one of the converted channels (channel 4).

Fig. 5.
Fig. 5.

Duty cycle evolution versus filter detuning

Fig. 6.
Fig. 6.

BER measurements for the conversions

Fig. 7.
Fig. 7.

Measured timing jitter reduction before and after the conversions

Tables (1)

Tables Icon

Table 1. Parameter values used in simulation

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