Transmission performance of a wavelength and NRZ-to-RZ format conversion with pulsewidth tunability by combination of SOA- and fiber-based switches.

An all-optical signal processing scheme coupling wavelength conversion and NRZ-to-RZ data format conversion with pulsewidth tunability into one by combination of SOA- and fiber-based switches, is experimentally demonstrated, and its transmission performance is investigated. An 1558 nm NRZ data signal is converted to RZ data format at 1546 nm with widely tunable pulsewidth from 20 % to 80 % duty cycle at the bit-rate of 10 Gb/s. The investigation on transmission performance of the converted RZ signals at each different pulsewidth is carried out over various standard single-mode fiber (SSMF) links up to 65 km long without dispersion compensation. The results clarify a significant improvement on transmission performance of converted signal in comparison with the conventional NRZ signal through tunable pulsewidth management and show the existence of an optimal pulsewidth for the RZ data format at each transmission distance with particular cumulative dispersion. The optimal pulsewidths of the converted RZ signal and its corresponding power penalties against the NRZ signal are also investigated in different SSMF links.

[1]  A. Willner,et al.  Width-tunable optical RZ pulse train generation based on four-wave mixing in highly nonlinear fiber , 2005, IEEE Photonics Technology Letters.

[2]  M. Eiselt,et al.  Chirp consequences of all-optical RZ to NRZ conversion using cross-phase modulation in an active semiconductor photonic integrated circuit , 2000, IEEE Photonics Technology Letters.

[3]  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.

[4]  Motoharu Matsuura,et al.  Performances of a widely pulsewidth-tunable multiwavelength pulse generator by a single SOA-based delayed interferometric switch. , 2005, Optics express.

[5]  Y. Ueno,et al.  Penalty-free error-free all-optical data pulse regeneration at 84 Gb/s by using a symmetric-Mach-Zehnder-type semiconductor regenerator , 2001, IEEE Photonics Technology Letters.

[6]  Akihide Sano,et al.  Long-span repeaterless transmission systems with optical amplifiers using pulse width management , 1998 .

[7]  Extinction ratio improvement by four-wave mixing in dispersion-shifted fibre , 2003 .

[8]  Chinlon Lin,et al.  Extinction ratio improvement by pump-modulated four-wave mixing in a dispersion-flattened nonlinear photonic crystal fiber. , 2005, Optics express.

[9]  J.P.R. Lacey,et al.  All-optical 1300-nm to 1550-nm wavelength conversion using cross-phase modulation in a semiconductor optical amplifier , 1996, IEEE Photonics Technology Letters.

[10]  Raman Kashyap,et al.  80 Gbit/s all-optical regenerative wavelength conversion using semiconductor optical amplifier based interferometer , 1999 .

[11]  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.

[12]  M. Matsuura,et al.  All-Optical Wavelength and Pulsewidth Conversions with a Sagnac Interferometer Semiconductor Based Switch , 2003, 2002 28TH European Conference on Optical Communication.

[13]  J.E. McGeehan,et al.  Performance optimization of RZ data format in WDM systems using tunable pulse-width management at the transmitter , 2005, Journal of Lightwave Technology.

[14]  M. Matsuura,et al.  Ultrawideband Wavelength Conversion Using Cascaded SOA-Based Wavelength Converters , 2007, Journal of Lightwave Technology.

[15]  L. Curtis,et al.  The effect of four-wave mixing in fibers on optical frequency-division multiplexed systems , 1990 .

[16]  Chang-Soo Park,et al.  Experimental demonstration of 10-gb/s data format conversions between NRZ and RZ using SOA-loop-mirror , 2005 .