Error-Free 320-Gb/s All-Optical Wavelength Conversion Using a Single Semiconductor Optical Amplifier

Low penalty 80Gb/s non-inverted wavelength conversion using a broad rectangular shaped optical filter

“…The CW probe signal was at 1548.1nm with a power of 6.7dBm. An SOA similar to the one used in [ 2] was also used for this experiment. The SOA has a measured total recovery time of 56psec when biased at 400mA, dominated by a slow blue component.…”

“…For that purposes it is desired to filter out the CW components without affecting the 1 st blue modulation side-band as it contains most of the regenerated pulse energy. In order to fulfil both of the above requirements a special flat top, broad filter with sharp roll off is required [ 2].…”

“…Semiconductor optical amplifiers (SOAs) have attracted considerable research interest for wavelength conversion due to their integration potential and power efficiency. Error-free wavelength conversion based on cross-gain and cross-phase modulation in a single SOA has been demonstrated at 320 Gb/s at the expense of a large penalty mainly caused by the excessive losses by a polarity inverter required for realizing non-inverted wavelength conversion [ 2]. It has been previously suggested [ 3] and demonstrated [ 4] that 80Gb/s direct non-inverted wavelength conversion can be achieved by filtering of only blue components out of the inverted probe signal coming out of an SOA based Wavelength Conversion (WC).…”

Semiconductor Optical Amplifier Nonlinearities and Their Applications for Next Generation of Optical Networks

“…They have been exploited in many functional applications, including switching (Kawaguchi, 2005), wavelength conversion (Liu et al, 2007), power equalization (Gopalakrishnapillai et al, 2005), 3R regeneration (Bramerie et al, 2004), logic operations (Berrettini et al, 2006), etc., thanks to their nonlinear effects, which are the subject of the current section. The effects are: the self gain modulation (SGM), the self phase modulation (SPM), the self induced nonlinear polarization modulation (SPR), the cross-gain modulation (XGM), the cross-phase modulation (XPM), the four-wave mixing (FWM) and the cross-polarization modulation (XPolM).…”

“…It has already been theoretically and experimentally clarified that the increase in electrical pumping power, confinement factor and the device interaction length effectively improve the speed performance (Joergensen et al, 1997). For improving the SOA-based wavelength converters, some techniques are proposed, such as: Fiber Bragg grating at 100 Gbit/s (Ellis et al, 1998), interferometric configuration at 168 Gbit/s (Nakamura et al, 2001), two cascaded SOAs at 170.4 Gbit/s (Manning et al, 2006) and optical filtering at 320 Gbit/s (Liu et al, 2007). In this section, we evaluate the influence of SOA parameters and the signal format (non return-to-zero "NRZ" or return-to-zero "RZ") on the behavior of the structure used in wavelength conversion configuration and we analyze the performance dependence on several critical operation parameters of the SOA structure.…”