Ehsan Shah Hosseini

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Silicon photonics has emerged as the leading candidate for implementing ultralow power wavelength-division-multiplexed communication networks in high-performance computers, yet current components (lasers, modulators, filters and detectors) consume too much power for the high-speed femtojoule-class links that ultimately will be required. Here we demonstrate(More)
We report on integrated erbium-doped waveguide lasers designed for silicon photonic systems. The distributed Bragg reflector laser cavities consist of silicon nitride waveguide and grating features defined by wafer-scale immersion lithography and a top erbium-doped aluminum oxide layer deposited as the final step in the fabrication process. The resulting(More)
We present experimental evidence for strong angular dispersion in a planar photonic crystal (PC) structure by properly engineering the modes in the second PC band. We show that by using the second photonic band of a square lattice PC, angular dispersion of 4 degrees /nm can be achieved. We also show that major challenges in designing practical PC devices(More)
We demonstrate almost synchronized temperature dependent wavelength shift of Al<inf>2</inf>O<inf>3</inf>:Er<sup>3+</sup> DFB laser (2.57 GHz/&#x00B0;C) and Si<inf>3</inf>N<inf>4</inf> ring filter (2.47 GHz/&#x00B0;C), which makes it possible for on-chip transceiver operation without temperature control.
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