Single SOA based 16 DWDM channels all-optical NRZ-to-RZ format conversions with different duty cycles.

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.

[1]  V. Baby,et al.  All-optical data format conversion between RZ and NRZ based on a Mach-Zehnder interferometric wavelength converter , 2003, IEEE Photonics Technology Letters.

[2]  John De Witt.,et al.  Baby and I , 1895 .

[3]  Jian Wang,et al.  Proposal and simulation of all-optical NRZ-to-RZ format conversion using cascaded sum- and difference-frequency generation. , 2007, Optics express.

[4]  Xinliang Zhang,et al.  All-Optical Clock Recovery From NRZ Signals at Different Bit Rates via Preprocessing by an Optical Filter , 2007, IEEE Photonics Technology Letters.

[6]  Gong-Ru Lin,et al.  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. , 2006, Optics letters.

[7]  A. D. Ellis,et al.  Four WDM channel NRZ to RZ format conversion using a single semiconductor laser amplifier , 1995 .

[8]  Bruno Lavigne,et al.  Polarity-preserving SOA-based wavelength conversion at 40 Gbit/s using bandpass filtering , 2003 .

[9]  Xiang Liu,et al.  Comparison of return-to-zero differential phase-shift keying and ON-OFF keying in long-haul dispersion managed transmission , 2003, IEEE Photonics Technology Letters.

[10]  Andrew D. Ellis,et al.  All-optical 42.6 Gbit=s NRZ to RZ format conversion by cross-phase modulation in single SOA , 2007 .

[11]  C.H. Kwok,et al.  Polarization-insensitive all-optical NRZ-to-RZ format conversion by spectral filtering of a cross phase modulation broadened signal spectrum , 2006, IEEE Journal of Selected Topics in Quantum Electronics.