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Experimental results for photonic crystal ring resonators (PhCRR) fabricated on the silicon-on-insulator (SOI) platform are presented. Spectral features of the PhCRR's transmission spectrum are discussed and quality factors in excess of 30,000 are reported.
We present higher order modulation formats on two and three orthogonal dimensions employing a direct detection Stokes vector receiver for high speed, high spectral efficiency single carrier short-haul optical fiber links.
We present the first phase-diversity coherent receiver for an arbitrary hybrid. Colorless reception of 10×132-Gb/s PDM-QPSK is experimentally demonstrated with reduced components and with less than 0.5 dB in OSNR penalty compared to traditional coherent receivers.
We designed and implemented a de-skew chip for parallel optical interconnects. The de-skew ability is limited by the line rate and rising/falling time. We modeled and tested the upper boundary of the maximum allowed channel skew that can be corrected by using this method. This is proved to be a simple and effective way at low line rates at around 2.5 Gbps. For higher line rates, per-pin de-skew scheme...
We propose and demonstrate an all-optical temporal differentiator based on a single n-phase-shifted fiber Bragg grating operated in reflection. This device can efficiently process arbitrary optical temporal waveforms with bandwidths up to a few gigahertz
We present the design and test of a 622/1244 Mb/s burst-mode clock and data recovery circuit (CDR) for gigabit-capable passive optical networks (GPON) OLT applications. Our design is based on a commercially available SONET CDR operated in 2times over sampling mode
We describe research activities in the Photonic Systems Group located in the Department of Electrical and Computer Engineering at McGill University. We are working on several different topics: optoelectronics, burst mode receivers, and agile optical networks; photonic crystals and plasmonic devices; ultrafast photonics and fiber optics; and all optical processing
We demonstrate a method for the fabrication of suspended gratings in GaAs/AlGaAs. These gratings are designed to act as high reflectivity mirrors in vertical cavity lasers. The fabrication process used is simple, and with a high yield. Stiction or fracture due to surface tension as well as stiction of grating fingers to one another is circumvented. In particular, we found that in fabrication of freestanding...
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