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We demonstrate low-driving power silicon microring Mach-Zehnder modulators (MZMs) driven by thermo-optic effect. The multiple-wavelength modulation is realized using a cascaded microring MZM. The driving voltage is reduced up-to 1/6 in a push-pull microring MZM.
We propose many-element cascaded-resonator devices with gapless inter-cavity coupling using spiral and double-notch microdisk resonators. We demonstrate such devices with up to 101 elements in a silicon nitride-on-silica substrate.
Design and characterization of a new generation of single-photon avalanche diodes (SPAD) array, manufactured by ST-Microelectronics in Catania, Italy, are presented. Device performances, investigated in several experimental conditions and here reported, demonstrate their suitability in many applications. SPADs are thin p-n junctions operating above the breakdown condition in Geiger mode at low voltage...
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