Photonic Fractional-Order Differentiator Using an SOI Microring Resonator With an MMI Coupler

Tunable fractional-order photonic differentiator using a distributed feedback semiconductor optical amplifier

“…The possible applications encompass optical computing, optical information processing, ultrafast signal generation, optical pulse shaping, dark soliton detection, and Hermite-Gaussian waveforms generation. Recently, the fractional-order differentiator has been implemented with different methods, such as tilted FBG, 15 asymmetrical phase-shifted FBG, 16 silicon-on-isolator (SOI) microring resonator (MMR) with a multimode interferometer coupler, 17 electrically tuned SOI Mach-Zehnder interferometer, 18 and a silicon MMR based on inverse Raman scattering. Numerous techniques have been proposed to implement integer-order differentiators, including the use of a phase-shifted fiber Bragg grating (FBG), 5-7 silicon microring resonators, [8][9][10] integrated sidewall phase-shifted Bragg grating, 11,12 or a modulation in a semiconductor optical amplifier (SOA).…”

Tunable fractional-order differentiator using an electrically tuned silicon-on-isolator Mach-Zehnder interferometer

“…In Ref [16], Cuadrado-Laborde et al explored fractional differentiation for the first time, and presented an all-optical temporal differentiator using a photonic Mach-Zehnder interferometer (MZI) by numerical simulations, but the tunability of the differentiation order was not mentioned. Afterwards, the fractional-order differentiator has been implemented based on different methods such as asymmetrical phase-shifted fiber Bragg grating [17], tilted fiber Bragg grating [18,19], and silicon-on-isolator (SOI) microring resonator with a multimode interferometer (MMI) coupler [20], and the last two schemes could provide tunability of fractional order. Fractional differentiation can be considered as a generalization of integer-order differentiation, with potentials to accomplish what integer-order differentiation cannot [16].…”

Broadband optical beam power splitter for wavelength dependent light circuits on silicon substrates

“…In many multi-port optical devices such as optical switches and cross-bar meshes, optical power splitters are the most important building blocks for kinds of optical components. An optical beam power splitter can be developed by many waveguide configurations [1], including directional coupler (DC) [2] and multimode interference (MMI) [3], as shown in Fig. 1.…”