Cross-Gain Modulation-based 2R Regenerator Using Quantum-Dot Semiconductor Optical Amplifiers at 160 Gbit/s

Abstract

This paper presents simulation results of the performance of a 160 Gbit/s 2R regenerator based on Quantum-Dot Semiconductor Optical Amplifiers (QD-SOA). The ultra-fast speed of this device is due to the large Cross-Gain Modulation (XGM) bandwidth of QD-SOAs. A Mach-Zehnder Interferometer (MZI) configuration is used to obtain a non-inverted output signal. Wavelength conversion and 2R (Re-amplifying, Re-shaping) regeneration is demonstrated and several performance issues are discussed.

Analysis of all-optical demultiplexing from 160/320 Gbit/s to 40 Gbit/s using quantum-dot semiconductor optical amplifiers assisted Mach-Zehnder interferometer

“…Wavelength conversions at 160 Gbit/s using XGM or XPM in QD SOAs have been simulated in Refs. [19][20][21].…”

Ultrafast All-Optical Full Adder Using Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer

“…wider span. In reality, however, this choice is technically limited by the fact that the extra bias current, which is required either for providing a higher current density in a given QD-SOA device or achieving the same current density in a longer QD-SOA, might not be reasonable for practical QD-SOAs [37,38]. Figure 6 shows the variation of ER with current densities for three different QD-SOA lengths.…”

Advanced optical modulation and format conversion

“…If it is acting only on the noise / intersysmbol interference, the regenerator is 2R: reamplify and reshaping [94][95][96]. If it also performs a jitter removal, as shown in Figure 2.21, it is 3R: 2R and retiming [97].…”