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# All-optical logic xor gate at 80 gb/s using SOA-MZI-DI

Dept. of Phys., Connecticut Univ., Storrs, CT

IEEE Journal of Quantum Electronics (Impact Factor: 2.11). 09/2006; DOI: 10.1109/JQE.2006.878184 Source: IEEE Xplore

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**ABSTRACT:**An interferometer with double loops based on a planar 3 × 3 coupler is proposed. The main factors that cause the instability of the polarization state are obtained by theoretical analysis and experiment. Furthermore, the stability of the polarization state is described quantitatively by the time-varying vector of polarization. Using these effective measures, interference with a stable polarization state at all times is achieved.Chinese Physics Letters 01/2012; 29(4). · 0.92 Impact Factor - [Show abstract] [Hide abstract]

**ABSTRACT:**This paper presents the simulation and design of all-optical logic gates OR, AND, XNOR, and XOR at ultrahigh speed by proposing the semiconductor optical amplifier–Mach–Zehnder interferometer (SOA-MZI) configuration. The simulations of all logic gates are obtained by SOA-MZI structure parameters at 40 and 120 Gb/s. The OR, AND, and XOR logics are implemented first time at 120 Gb/s by using single wavelength and an SOA-MZI. The XNOR logic is realized directly by the proposed SOA-MZI without any implementation with existing logics. Thus, realization of these logics at 40 and 120 Gb/s will enhance the future optical signal processing applications for super-high speed operation.IEEE Journal of Selected Topics in Quantum Electronics 01/2012; 18(2):970-977. · 4.08 Impact Factor -
##### Conference Paper: Tb/s all-optical nonlinear switching using semiconductor optical amplifier based Mach-Zehnder interferometer

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**ABSTRACT:**A new method for increasing speed of all-optical Mach-Zehnder Interferometric (MZI) switching with bulk semiconductor optical amplifier (SOA), by use of chirped control signals, is suggested and theoretically analyzed. For 125 fs input and chirped control pulses, we show acceleration of gain recovery process using cross phase modulation (XPM) effect. Our method depicts that Tb/s switching speeds using bulk SOA-MZI with proper Q-factor is feasible. For the first time we reach operation capability at 2Tb/s with a Q-factor more than 10. The new scheme also improves the extinction and amplitude ratio of the output power as well as increases the contrast ratio of the switched signal. We use finite difference beam propagation method for MZI analysis, taking into account all nonlinear effects of SOA such as group velocity dispersion (GVD), Kerr effect, two photon absorption (TPA), carrier heating (CH) and spectral hole burning (SHB).Electrical Engineering (ICEE), 2012 20th Iranian Conference on; 01/2012

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