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We propose a WDM and MDM compatible 2×2 switch on a silicon chip. It is composed of mode multiplexers, 2×2 single mode optical switch elements, and mode de-multiplexers. We demonstrate a prototype which can manipulate four spatial modes with broad wavelength span.
We demonstrate a silicon PAM-4 optical modulator which is driven by two uncorrelated binary electrical signals with different peak-to-peak voltages. The device can work at 32 Gbaud in the wavelength range from 1525 nm to 1565 nm.
We demonstrate a silicon PAM-4 optical modulator, which is based on a symmetric Mach-Zehnder interferometer. Two uncorrelated binary electrical signals with different peak-to-peak voltages are applied to the phase shifters of the silicon optical modulator. Accordingly, two different phase shifts are generated in the two arms. After the permutation, there are totally four phase differences between...
We propose a silicon 2×2 optical switch which can simultaneous manipulate wavelength division multiplexing and mode division multiplexing signals. It is composed of broadband mode multiplexers, demultiplexers and single mode optical switch elements. For demonstration, we design and fabricate a prototype device using asymmetric directional coupler and Mach-Zehnder optical switch elements which can...
We demonstrate a single-drive parallel-push-pull silicon optical modulator. When optically biased at the quadrature point, the device has an extinction ratio of 3.1 dB at the speed of 20 Gbps and under the driving voltage of 1.8 Vpp.
We demonstrate a four-port optical switch for the photonic network-on-chip architecture, which contains four silicon Mach-Zehnder optical switch elements tuned by the plasma dispersion effect. The optical signal-to-noise ratio of the device is over 10.0 dB in the wavelength range from 1525 nm to 1565 nm. Its 10%–90% rise time and fall time are 2 ns.
We report the complex dynamics observed in a nonlinear delayed feedback oscillator with silicon Mach-Zehnder electro-optic modulator. Period-doubling bifurcation, period-three signal, virtual chimera states and chaotic signal are observed.
We report a 4×4 microring modulator matrix integrated with mode multiplexer and demultiplexer based on asymmetrical directional couplers (ADCs) for on-chip optical interconnect. Data transmission with the capacity of 512 Gbps is demonstrated by adopting 4 wavelengths and 4 modes multiplexing.
"Scenario-Respond" are the most efficient model for unconventional emergency management, and the scenarios are the foundation to deal with the unconventional emergency, therefore how to build and deduce the scenarios are important research parts of "scenario-respond". From the respective of cognitive science, the paper built a scenario deduction framework based on the knowledge-unit...
This paper presents an optimization-based technique to develop silicon substrate for accurate and efficient electromagnetic (EM) simulations. The proposed method simplifies the highly nonlinear substrate doping profile into a few regions with effective conductivities. The accuracy of the optimized substrate is validated against measurement data for two spiral inductors. This simplified substrate enables...
We illustrate a 2×2 quantum photonic switch fabric using two-photon quantum interference in an integrated silicon microring resonator array. Our modeling demonstrates phase- or wavelength-selective routing of single photons at different output states.
Sequential pattern mining is a very significant data mining project. In this area, most of the previous studies require us to provide a support threshold to accomplish the mining. However, in reality providing an appropriate threshold is very difficult if we did not acquaint with some background information relevant to the data. In addition, there exist many useless sequential patterns when the least...
A novel Trench Fast Recovery Diode (FRD) structure with injection control is proposed in this paper. The proposed structure achieves improved carrier profile without the need for excess lifetime control. This substantially improves the device performance, especially at extreme temperatures (-40 °C to 175 °C). The device maintains low leakage at high temperatures, and its Qrr and Irm do not degrade...
Connectivity has been extensively studied in ad hoc networks, most recently with the application of percolation theory in two-dimensional square lattices. Given a message source and the bond probability to connect neighbor vertexes on the lattice, percolation theory tries to determine the critical bond probability above which there exists an infinite connected giant component with high probability...
We demonstrate a 2-mm-long carrier-depletion modulator which can work at a speed of 40 Gbps under a differential voltage of 0.36 V with no reverse bias. The power efficiency could be 49 fJ/bit.
In this paper we propose to use comb switches to simplify Banyan-type on-chip wavelength-routed passive photonic networks constructed by micro-ring resonator (MRR)-based optical switches. Compared with general wavelength-routed optical networks, the number of MRRs used in the simplified network is significantly reduced.
This paper presents a reconfigurable architecture and associated design methodology for developing networking silicon chips. The tools include most of the common traffic QoS features and low level interfaces as well as some special features for extensible design. When coupled with the design tools, this architecture provides powerful capabilities for the design of highly flexible networking silicon...
We demonstrate a carrier-depletion optical modulator with the driving voltage swing of 2 V and the extinction ratio of 12.79 dB at 12.5 Gbit/s. Even the driving voltage is reduced to 1 V, the the device still has an extinction ratio of 7.67 dB.
As a result of the low modulation efficiency of carrier-depletion Mach-Zehnder silicon optical modulator, it always needs a high voltage around 6 V, which is very difficult to supply in an integrated high-speed CMOS chip. We demonstrate a carrier-depletion Mach-Zehnder silicon optical modulator which works at a low voltage. Its coplanar waveguide electrode is carefully designed to make sure the electrical...
Photonic Networks-on-Chip (NoC) is considered as a promising candidate to interconnect a large number of processing cores. The heart of a photonic NoC is the on chip photonic interconnection network which is composed of silicon waveguides and optical routers. In this paper, we propose a scalable and non-blocking passive optical router design using micro-ring resonators (MRRs), namely the generic wavelength-routed...
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