All-optical AND gate implementation using cross-polarization modulation in a semiconductor optical amplifier

On the Feasibility of 320 Gb/S All-Optical and Gate Using Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer

“…7(c). The Q-factor remains over 6 against τ 21 within approximately 1.17 ps. The values lying in this range as well as the maximum of 0.65 ps are typical for τ 21 [45].…”

“…In the other case the focus is on the gain that is modulated by the NRZ input pulse train and it is shown to respond directly to the input data pattern, i.e., the gain is saturated as long as logic ones enter the QD-SOA and it recovers when one or more logic zeros appear at the input. The same study examines also the change of the QD-SOA gain dynamics by a NRZ input pulse train for different values of τ 21 , which shows that the decrease of this parameter speeds up the gain recovery of the QD-SOA. Moreover in [49], the temporal dependence of the gain is derived for the case of a single input RZ pulse and for different values of J and τ w2 .…”

“…Given its important, multi-lateral role the AND gate has attracted intense research interest and among the technological options that exist for its implementation those that exploit a semiconductor optical amplifier (SOA) are well established [17]. In fact, besides being employed for classical applications such as signal generation [18], amplification [19] and modulation [20], SOAs have also demonstrated their potential as nonlinear switching elements for performing all-optical AND logic, either as stand-alone entities [21][22][23][24][25][26][27] or incorporated in an interferometric configuration [28][29][30][31][32].…”

Design of optical logic gates using photonic crystal

“…In order to realize the gates, various configurations have been reported that utilize the nonlinear properties of the optics. Until now, all-optical gates reported in the literature [1][2][3][4][5][6] could be achieved with a semiconductor laser amplifier loop mirror (SLALOM), a semiconductor optical amplifier-(SOA-) based Mach-Zehnder interferometer (SOA-MZI), a SOA based ultra fast nonlinear interferometer (UNI), cross-polarization modulation, and four-wave mixing (FWM) in SOAs, SOA with Optical filter, Periodically Poled Lithium Noibate (PPLN) waveguide . These schemes suffered from certain fundamental limitations such as latency time, power consumption, signal to noise ratio, speed, dependence on temperature, polarization and size.…”

All-optical NAND gate using integrated SOA-based Mach–Zehnder interferometer

“…In transmission, the optical label has to be examined at each node to retrieve the destination information, which is essential for making routing decision [1]. The all-optical high-speed logic gates, which are important for all-optical signal processing such as pattern matching, pseudorandom number generation, and parity checking, may be classified into two categories generally depending on the methodology used to achieve the nonlinear operation of the logic devices, i.e., the fiber nonlinearitybased logic gates [2][3][4][5] and the semiconductor-optical-amplifier (SOA)-based logic gates [6][7][8][9], in which the logic gates employing integrated SOA-based Mach-Zehnder interferometer (MZI) are attractive for simple structure, stable and efficient operation, cascading capability, and easy implementation compared with fiber-based devices [7].…”