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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:**In this paper, we present a device with a silicon-on-insulator (SOI) based symmetrical Mach-Zehnder interferometer (MZI) structure to perform the ultrahigh speed all-optical AND logic gate function. Simulation results show that, while the operation speed is at a bit rate of 200 Gbit s(-1), the output parameters including extinction ratio and eye-opening ratio for outcome AND logic gate signal can, respectively, reach as high as similar to 12.8 dB, and similar to 0.94 in the case of a 5mm long SOI waveguide by means of judiciously adjusting the initial conditions, such as incident signal and probe continuous-wave (CW) powers.Journal of Modern Optics 03/2010; 57(6):460-465. · 1.16 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 - [Show abstract] [Hide abstract]

**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

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