All optical signal regeneration in cascaded Mach–Zehnder interferometer wavelength converter

Abstract

the XPM wavelength converter is very useful for an efficient optical wavelength conversion, because it enables an increase in the input-dynamic range and accommodates a relatively small input of optical power. ACKNOWLEDGMENT

Theoretical investigation of the input power dynamic range enhancement of XPM wavelength converter using a CW holding beam

“…It shows high conversion efficiency, extinction ratio enhancement, and negative chirp characteristics. Moreover, we showed that the XPM wavelength converter has an advantage of all optical regeneration by using very steep transfer curves (Lee et al 2001).…”

“…Moreover, using current control and CW holding beam power control in preamplifier give advantages such as uniform power level of wavelength converted output signal, higher ER and very steep slope of transfer function. So, we can expect that 2R regeneration of wavelength converted signal using these steep transfer curve (Lee et al 2001). However, in case of the current control method, the input signal is distorted seriously (under-shooting or over-shooting) during amplifying process by the preamplifier in proportion to data bit rate.…”

Statistic numerical analysis of all-optically regenerated transmission system: how to keep high strictness and simplicity at the same time

“…In spite of extensive experimental approaches, only a few attempts have been reported for analytical analyses [1,2,3,4,5], but the former analytical approaches lack either strictness or simplicity. For example, Refs.…”

“…In contrast, Ref. 2 shows more strict calculations that are based on the first principle of the device physics, although the calculations are much more complicated and hence would be time-consuming.…”

Performance variation of preamplifier integrated cross-phase modulation wavelength converter by internal reflectivity of semiconductor optical amplifiers

“…Moreover, the XPM wavelength converter has an advantage of all-optical regeneration using very steep transfer curves. 7 However, the XPM wavelength converter has a critical drawback of limited the input power dynamic range ͑IPDR͒, i.e., 3 to 4 dB at 10 Gbps operation. The IPDR is important because the signals are experiencing the different attenuation through the network with subsequent variations of the input power to the switch blocks.…”