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We propose to apply the multiple-input multiple-output (MIMO) from wireless communication to high density on-chip optical interconnect. MIMO makes it possible to reduce the waveguide pitch to subwavelength range and uses the crosstalk to improve system performance. The proposed N×N on-chip MIMO system consists of transmitter, high-density waveguides, homodyne coherent receivers, and electrical signal...
Z-shaped slots fit within the narrow wall of a rectangular waveguide, offering a potential mechanical strength advantage compared to conventional inclined narrow wall slotted waveguide antennas for applications where the waveguide tube is a load bearing structure. Squeezing the Z-slots moved the edge of the perforations away from the corners of the WR-90 sized rectangular 6063 aluminum tubing, causing...
We demonstrate low-voltage germanium waveguide avalanche photodetectors (APD) with gain-bandwidth product of 88GHz. A 7.1dB sensitivity improvement is demonstrated for an APD wire-bonded to a 10Gb/s CMOS transimpedance amplifier, at −6.2V APD bias.
A wideband grating coupler based on interleaving dispersion engineered subwavelength structures has been proposed and experimentally demonstrated. The fabricated device shows a coupling efficiency of 5.1dB and a 1dB bandwidth of 70 nm.
Although analog circuits are usually only a small part of an overall mixed-signal design, the time it takes to design these circuits is significantly longer. On the digital side, design automation and optimization tools have been around for a long time and are well established. These tools free up the designer to focus on more innovative tasks and allow for greater design productivity. The analog...
Ultra-broadband amplitude modulation for spectral-shifted pulse pair generation is realized by a liquid-crystal spatial light modulator. The results indicate that it's a promising way for single attosecond pulse characterization by the conventional SPIDER method.
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