Error free 100 Gbit/s wavelength conversion using grating assisted cross-gain modulation in 2 mm long semiconductor amplifier

Analysis of bit rate dependence up to 80Gbit/s of a simple wavelength converter based on XPM in a SOA and a shifted filtering

“…We can note that these observations are consistent with the results presented in the literature, demonstrating the RSF best performances at a bit rate not greater than 10 Gbit/s [19] and achieving high bit rate performances only with the BSF technique [12,13,17,23,27] or the combination of both techniques [24].…”

“…A simpler technique is to use a shifted bandpass filter (BPF) following the SOA. This was first proposed by Ellis et al [12] and has recently…”

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

“…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.…”

“…Particularly, in the wavelength conversion based on the XGM scheme, a strong input signal is needed to saturate the SOA gain and thereby to modulate the CW signal carrying the new wavelength. While the XGM effect is accompanied by large chirp and a low extinction ratio, and limited by the relatively slow carrier recovery time within the SOA structure, impressive wavelength conversion of up to 40 Gbit/s and with some degradation even up to 100 Gbit/s (Ellis et al, 1998), has been demonstrated. To overcome the XGM disadvantages, SOAs have been integrated in interferometric configurations, where the intensity modulation of the input signal is transferred into a phase modulation of the CW signal and exploited for switching.…”

80 Gbit∕s wavelength conversion using semiconductor optical amplifier and optical bandpass filter

“…A fibre Bragg grating (FBG) [1] and a waveguide filter [2] have been used to increase the frequency response of an SOA. Wavelength conversion at 100 Gbit=s has been achieved by using a long SOA (2 mm) in combination with a FBG [3]. Differential Mach-Zehnder interferometers with SOAs in both arms have been used to realise fast wavelength conversion [4].…”