Introduction: Optical buffer via optically controlled slow light propagation is highly desirable for numerous applications, including all-optical true time delay, signal processing and storage. The device is based on optically controlled dispersion, which leads to the possibility to control the group velocity. An all-optical buffer based on electromagnetically-induced transparency in quantum do...

Introduction: All-optical wavelength converters with 2R regeneration capabilities, that allow operation at speeds beyond the limits of electronic devices, will be essential in future wavelength division multiplexing (WDM) networks. Of particular interest are simple and compact wavelength converters that help to avoid wavelength blocking and facilitate WDM network management. All-optical wavelen...

High-speed signal computation and communication are an essential part of modern that increases optical necessity. Therefore, researchers developed different types digital devices in the all-optical domain. Due to versatile gain medium reflective semiconductor amplifiers (RSOAs), it has various important applications passive networks. In comparison with amplifier (SOA), RSOAs exhibit better perf...

Chirped pulse scheme is shown to be highly effective to attain large tunable time shifts via slow and fast light for an ultra-short pulse through a semiconductor optical amplifier (SOA). We show for the first time that advance can be turned into delay by simply reversing the sign of the chirp. A large continuously tunable advance-bandwidth product (ABP) of 4.7 and delay-bandwidth product (DBP) ...

Based on nine up-to-date types of semiconductor-optical-amplifier (SOA) samples, we devised a power-consumption model of SOA-based all-optical gates as a tool to develop faster and more efficient OTDM systems for bitrates from 10 to 160 Gb/s and those over 160 Gb/s. The conventional effect of a continuous wave (cw) holding beam was included in the model. Furthermore, in this work we defined thr...

An actively mode-locked fiber laser with controllable pulse repetition rate and tunable duration is presented, in which an optical delay line (ODL) used to adjust the cavity length precisely for regulating rate, a semiconductor amplifier (SOA) introduced enabling control. Experimentally, continuous tuning of from 2 GHz 6 realized, limited by availability even higher radio-frequency (RF) source....

This work studies the thallium halogenide TlBr/BrCl quantum dot (QD) semiconductor structure and specifies its optical properties. QD is poorly studied. High gain obtained, with two peaks at 800 id="M2"> 3000 n mathvariant="normal">m . Doping shown to increase ...

We investigate an all-optical switch that is operated by the nonlinear phase-shift introduced by optical pulses with duration of 200 fs in a semiconductor optical amplifier (SOAs). The gate is made out of a commercially available InGaAsP–InGaAs multi-quantum-well (MQW) SOA placed in a Mach–Zehnder interferometer. We have measured the nonlinear phase-shift as a function of the injection current ...

A high-speed interrogation scheme for large-scale fiber Bragg grating (FBG) sensing arrays is presented. This technique employs parallel computing and pipeline control to modulate incident light and demodulate the reflected sensing signal. One Electro-optic modulator (EOM) and one semiconductor optical amplifier (SOA) were used to generate a phase delay to filter reflected spectrum form multipl...

This gazette focuses on simulation and experimental studies for all-optical three-input “AND” gate schemes. The proposed exploits the semiconductor optical amplifier Mach-Zehnder Interferometer (SOA-MZI) nonlinearities, particularly cross-phase modulation (XPM) corollary in addition to cross-gain (XGM) corollary, which originates from a SOA-MZI differential concept. Further, system performance ...