Abstrac: We present simulation results of an ultrafast alloptical interferometric switching devices based upon the resonant nonlinearity in a semiconductor optical amplifier (SOA). We have investigated two configurations: one based upon a Sagnac interferometer and one based upon a MachZehnder interferometer. The switches have been used to model a 1x2 all-optical OTDM router. Simulation results ...

We report on an all-optical AND-gate using simultaneous Four-Wave Mixing (FWM) and Cross-Gain Modulation (XGM) in a semiconductor optical amplifier (SOA). The operation of the proposed AND gate is simulated and the results demonstrate its effectiveness. This AND gate could provide a new possibility for all-optical computing and all-optical routing in future all-optical networks. In an AND ( AB ...

This paper presents an approach for evaluating the limitation imposed by the amplified spontaneous emission (ASE) noise generated by a semiconductor optical amplifier (SOA) in a direct detection differential phase-shift keying (DPSK) system. This analysis takes into account the effects of an arbitrary receiver baseband filter, whose impulse response is limited to one bit period, as well as the ...

In this paper, by integrating InP/InGaAsP/InP Photonic crystal semiconductor optical amplifier (PhC-SOA) with photonic channel drop filters (PhC-CDF), we present a novel fully integrated ultra-small low-power all-optical analog to digital converter (AO-ADC). The self-phase modulation in the PhC-SOA can shift frequency of Gaussian input pulse. two output PhC-CDFs are designed way that appropriat...

Wavelength reuse in a bidirectional radio-over-fiber link is proposed and demonstrated based on the cross-gain modulation (XGM) and the cross-polarization modulation in a semiconductor optical amplifier (SOA). With a polarization beam splitter placed at the remote antenna unit, the polarization-modulated signal generated at the SOA is converted into noninverted and inverted intensity-modulated ...

We report a 160 Gb/s OTDM network comprising switching and demultiplexing through field deployed fiber. The 160 Gb/s signal was obtained by time-interleaving 16 channels of a 10 Gb/s signal. The add-drop node was realized by using a gain-transparent operation of a semiconductor optical amplifier (SOA). A subharmonic clock recovery with a pre-scaled electro-optical phase locked loop employing an...

The phase-preserving amplitude regeneration scheme based on the bidirectional orthogonal-pumped semiconductor optical amplifier (SOA) is proposed in this work. Experimental investigation into multiple four-wave mixing (FWM) process from pump, signal and their corresponding reflective fields carried out detail. performance obtained product between co-propagating also discussed, including its dep...

A wavelength-tunable single-frequency fiber laser based on the spectral narrowing effect in a nonlinear semiconductor optical amplifier (NL-SOA) is proposed and experimentally demonstrated. The single-frequency operation is achieved based on the spectral narrowing effect resulted from the inverse four-wave mixing in a NL-SOA. By incorporating the NL-SOA in the fiber laser cavity, single-frequen...