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We design and demonstrate widely-tunable large-FSR dual-microring add/drop filters. The integrated resistive tuning section in microrings included “pinched” p-n junctions, limiting the current at higher voltages and inhibiting damage under microsecond-scale pre-emphasized drive.
We design and demonstrate heat-harvesting two-part compact variable optical attenuators, which provide a high controllable extinction ratio at C- and L-band wavelengths, and multiplex the added channels into a single output port.
A silicon-photonic Fourier Transform Spectrometer is designed based on coupledmicroring resonators forming a slow-light waveguide, which scans the propagation delay electrically. The simulated device is compact, fast and achieves high spectral resolution in targeted bands.
We design a nonlinear waveguide for 2f-to-3f optical frequency conversion based on silicon nitride-lithium niobate and calculate high nonlinear conversion efficiencies of 898, 623, and 3169 %-W−1-cm−2 for the processes discussed.
We demonstrate a fast method of modeling heat transfer in photonic integrated circuits by simple thermal resistance circuits that use a conical surface area approximation for effective thermal resistance. We show, with Spectre simulations, accuracy to laboratory measurements within about 2 K.
Bonded silicon-on-insulator and lithium niobate-on-insulator dies are shown to be thermally stable up to 300° over a 67.2 mm2 bonded area. Optical propagation through a waveguide on this bonded hybrid silicon-lithium niobate platform is performed.
Using all silicon photonic components, including an electrically-pumped hybrid silicon laser and a high-Q ring resonator, photon pairs with non-classical correlations were generated at room temperature near 1310 nm wavelengths.
The two-photon spectrum of photon pairs generated at room-temperature in optically-pumped silicon microrings was measured using tunable filters, InGaAs single-photon avalanche detectors and deconvolution, and an image-processing artifact-reduction algorithm is discussed.
A set of optical components for the hybrid silicon-lithium niobate platform is designed and tabulated as robust parameterized-cells. Eye diagrams of an IQ electro-optic modulator are simulated at 25 and 50 Gbps.
Integrated optics devices for nonlinear optics may be made by using unpatterned thin films of a nonlinear crystal such as lithium niobate in conjunction with (for example, bonded to) an easily-patterned material such as silicon or silicon nitride which is commonly used in a silicon photonics platform. We propose and analyze a device for difference-frequency generation in a hybrid waveguide which uses...
Compared to traditional crystal-based nonlinear optical devices, photonic integrate circuits on a silicon platform may enable advanced and parallelized functionality in chip-scal energy-efficient nonlinear optics, such as combinations of mixers, filters and photodetectors.
Silicon photonic waveguides and resonators fabricated using CMOS-compatible processes can generate photon pairs at telecommunications wavelengths and at room temperature, with electrically controllable properties e.g., tunable frequency-bin entangled comb and tunable joint spectral intensity.
We demonstrate and investigate concurrent switching of twenty 10-Gbps channels using a silicon Mach-Zehnder interferometer switching structure with low on-state loss, low power, and microsecond-scale switching time.
We describe the design and operation of a silicon-photonic device for monitoring power variations of individual channels in a multi-wavelength DWDM network. Amplitude variations of ∼20 dB, for channels spaced by 100 GHz, are measured.
We demonstrate a new method to extract the electronic carrier-induced loss and coupling coefficients of modern thermo-optic and electro-optic silicon Mach-Zehnder interferometer based 2x2 switches (Sandia, IBM and Kotura-Oracle) from the transmission spectra.
To demonstrate control over the quantum spectrum of light, we tune the joint spectral intensity of photon pairs generated at telecommunications wavelengths using a low-power diode-pumped compact CMOS-compatible silicon chip at room temperature.
We improve CW wavelength conversion efficiency by 10 dB in an optical waveguide consisting of 51 directly-coupled silicon microrings, based on electronic free-carrier sweepout using two reverse-biased p-n junction diodes on each microring resonator.
Electronic on-off switching control over optical Anderson localized modes is demonstrated for the first time, using a lithographically-fabricated CMOS-compatible silicon photonic waveguide infiltrated by about 100 sub-micron-scale p-n junction diodes.
Using a compact (0.03 mm^2) silicon photonic thermo-optic switch with five cascaded thermo-topic phase-shifters, we demonstrate low insertion loss, low power, microsecond-scale cross-bar switching of twenty wavelength channels, each carrying 10 Gbit/second data concurrently.
A compact silicon photonic channelized optical spectrum monitor is designed and realized, which can replace a large rack-mounted OSA's channel power monitoring functionality, and the signal processing algorithm underlying its operation is described.
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