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We presented a 32-channel silicon hybrid demultiplexer fabricated with CMOS technology. Double-etched mode converter and wide arrayed waveguide are used to improve AWG performances while the counter-tapered coupler is optimized for broadband mode multiplexing.
We propose and numerically simulate a 2×2 Digital Optical Switch (DOS) based on silicon-on-insulator (SOI) adiabatic coupler for TE polarizations at 1550nm. The simulation results acquired by Beam-Propagation-Method (BPM) reveal that the cross-talk (CT) levels are below −27dB over a broadband of 60nm. Small simulated insertion-losses (ILs) below 0.1dB are obtained between the wavelengths 1520nm to...
We presented a comparison and analysis on single-layer silicon fiber-to-chip edge couplers with different taper tips. The double-tip edge coupler exhibits a lower coupling loss, larger bandwidth and better fabrication tolerance. In addition, the short edge couplers with 40 μm length have the best performances.
We demonstrate a silicon QPSK modulator consisting of two nested Mach-Zehnder interferometers with 3.5 mm long traveling-wave electrodes. 64 Gb/s QPSK modulation is achieved with an EVM of 24.4% and power consumption of 7.1 pJ/bit.
A frequency-tunable lens-coupled annular-slot antenna using a Schottky varactor diode has been developed and characterized at 140–220 GHz. A tuning range of ∼50 GHz (agree with simulation) has been demonstrated by varying the diode's DC bias. Antenna far-field patterns have been measured at 203 GHz, showing that the diode has only a minor effect on the antenna's radiation properties. This type of...
We demonstrate a single-drive high-speed silicon Mach-Zehnder modulator with the Vπ·L of 1.35 V·cm. 20 Gb/s on-off keying (OOK) and 15 Gb/s binary phase shift keying (BPSK) modulations are achieved.
We propose and demonstrate a graphene-based device achieving extraordinary control of terahertz (THz) wave reflectance. The advantages of graphene based switchable THz devices include low cost, facile fabrication and excellent tunability, thus promising for THz system applications.
An easy-to-fabricate hybrid plasmonic waveguide consisting of a semiconductor nanowire embedded inside a dielectric-coated V-shaped metal groove is shown to support strongly confined hybrid plasmonic modes avoiding alignment errors.
This paper proposes an improved Distributed Compressive Video Sensing (DCVS) framework based on adaptive sparse basis, which integrates the recently emerging Distributed Video Coding (DVC) and Compressive Sensing (CS) theory. The proposed framework incorporates a low-complexity encoder and shifts most computation burden to the decoder-side. At the encoder, the video frames are sampled independently...
A novel micromachined resonant pressure sensor designed with DETFs (double-ended tuning forks) resonant beam and differential structure was put forward in this paper. Three groups of DETFs resonant beams form the differential structure to achieve the better sensitivity and make the sensor free of the environment changes. Four beams with the same size compose the DETFs to improve the Q-factor of the...
An electromagnetically excited silicon nitride beam resonant pressure sensor is described and numerical modeling is carried out on the analysis of the sensitivity of pressure measurement and temperature drift. The proposed approach is based on measurement of resonant frequencies for two resonant beams located on a diaphragm inducing different axial stress under an applied pressure, the differential...
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