18 research outputs found
A Complexity Analysis of Smart Pixel Switching Nodes for Photonic Extended Generalized Shuffle Switching Networks
This paper studies the architectural tradeoffs found in the use of smart pixels for nodes within photonic switching interconnection networks are discussed. The particular networks of interest within the analysis are strictly nonblocking extended generalized shuffle (EGS) networks. Several performance metrics are defined for the analysis, and the effect of node size on these metrics is studied. Optimum node sizes are defined for each of the performance metrics and system-level limitations are identified
Low-power high-speed silicon microdisk modulators
Abstract: A novel silicon microdisk modulator with "error-free" ~3 femtojoule/bit modulation at 12.5Gbs has been demonstrated. Modulation with a 1 volt swing allows for compatibility with current and future digital logic CMOS electronics
High-Performance Silicon Photonic Single-Sideband Modulators for Cold Atom Interferometry
The most complicated and challenging system within a light-pulse atom
interferometer (LPAI) is the laser system, which controls the frequencies and
intensities of multiple laser beams over time to configure quantum gravity and
inertial sensors. The main function of an LPAI laser system is to perform
cold-atom generation and state-selective detection and to generate coherent
two-photon process for the light-pulse sequence. Substantial miniaturization
and ruggedization of the laser system can be achieved by bringing together most
key functions of the laser and optical system onto a photonic integrated
circuit (PIC). Here we demonstrate a high-performance silicon photonic
carrier-suppressed single-sideband (CS-SSB) modulator PIC with dual-parallel
Mach-Zehnder modulators (DP-MZMs) operating near 1560 nm, which can dynamically
shift the frequency of the light for the desired function within the LPAI.
Independent RF control of channels in SSB modulator enables the extensive study
of imbalances in both the optical and RF phases and amplitudes to
simultaneously reach 30 dB carrier suppression and unprecedented 47.8 dB
sideband suppression with peak conversion efficiency of -6.846 dB (20.7 %).
Using a silicon photonic SSB modulator with time-multiplexed frequency shifting
in an LPAI laser system, we demonstrate cold-atom generation, state-selective
detection, and the realization of atom interferometer fringes to estimate
gravitational acceleration, , in a
Rubidium (Rb) atom system.Comment: 18 pages, 9 figure
Chronic kidney disease and valvular heart disease: conclusions from a Kidney Disease: Improving Global Outcomes (KDIGO) Controversies conference
Chronic kidney disease (CKD) is a major risk factor for valvular heart disease (VHD). Mitral annular and aortic valve calcifications are highly prevalent in CKD patients and commonly lead to valvular stenosis and regurgitation, as well as complications including conduction system abnormalities and endocarditis. VHD, especially mitral regurgitation and aortic stenosis, is associated with significantly reduced survival among CKD patients. Knowledge related to VHD in the general population is not always applicable to CKD patients because the pathophysiology may be different, and CKD patients have a high prevalence of comorbid conditions and elevated risk for periprocedural complications and mortality. This Kidney Disease: Improving Global Outcomes (KDIGO) review of CKD and VHD seeks to improve understanding of the epidemiology, pathophysiology, diagnosis, and treatment of VHD in CKD by summarizing knowledge gaps, areas of controversy, and priorities for research
Analysis of Non-Periodic Surface Acoustic Wave Transducers and Reflectors
Coordinated Science Laboratory was formerly known as Control Systems LaboratoryJoint Services Electronics Program / N00014-79-C-0424U.S. Air Force / F19628-78-C-0040U of I OnlyRestricted to UIUC communit