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This paper reports recent progress beyond our initial report [1] in resonator fiber optic gyroscope (RFOG) development towards realization of a next generation compact device for commercial navigation applications by incorporation of silicon optical bench technology to miniaturize resonator and input optics. The resonator fiber optic gyro is being pursued because of its theoretical potential to meet...
The bandgap reference circuits are very sensitive to electromagnetic interferences (EMI) which induce voltage offset on their outputs. Two bandgap chips with different technologies are designed for EMC study. The conducted immunity of VDD and VSS pins are tested following direct power injection (DPI) method. The aim of this study is to compare the susceptibility characteristics of same bandgap circuit...
We report on the operation of electrically pumped 1.3µm InAs QD laser directly grown on a Si substrate using InAlAs/GaAs dislocation filter layers with a threshold current density of 194A/cm2 and output power of ~80mW.
Atmospheric-pressure plasma jet (APPJ) has attracted tremendous attention in the past decade mainly due to its low cost and flexibility without the use of expensive vacuum equipment. It has found numerous applications such as surface cleaning, surface modification, thin-film deposition and recently biomedical applications that may include sterilization, blood coagulation, cell growth enhancement and...
This paper reports a 3-dimensional (3D) micro-optical coupling system for improving coupling efficiency in the Littrow configured micro-electro-mechanical system (MEMS) tunable lasers. In the coupling system, an optical fiber acts as a rod lens for light convergence in the vertical plane, while a deep-etched silicon parabolic mirror confines the light in the horizontal plane. Compared with previous...
Technology challenges and solutions in the development and fabrication of high-density three dimensional (3D) chip integration structures have been investigated. Critical 3D integrated circuit (IC) enabling technologies, such as through silicon via (TSV), wiring and redistribution layer (RDL), wafer thinning and handling, micro-bump (μ-bump) processes and joining, that form the building blocks for...
As the LHC luminosity is ramped up to 3×1034 cm-2 s-1 and beyond, the high rates, multiplicities, and energies of particles seen by the detectors will pose a unique challenge. Only a tiny fraction of the produced collisions can be stored on tape and immense real-time data reduction is needed. An effective trigger system must maintain high trigger efficiencies for the physics we are most interested...
This paper reports a miniature MEMS tunable dual-wavelength laser by integrating a gain chip, a beam splitter, and a pair of Bragg reflectors which has different periods. In the experiment, simultaneous two wavelengths emissions are observed with a thermo-optic tuning range of 1574.7 nm to 1578.6 nm and 1576.1 nm to 1582.6 nm, respectively.
Finite element simulations of novel InGaN solar cells, requiring no p-type InGaN, were carried out using the commercial software package APSYS. Simulations show that efficient, compositionally graded p-GaN/n-InxGa1-xN solar cells can be achieved, provided the graded layer is confined within the depletion region. These compositionally graded solar cells can be used as the top cell in an InGaN/Si double-junction...
One of the smallest Joule Thomson (J-T) micro cryogenic coolers (MCC) utilizing a hollow-core fiber-based heat exchanger (HX) is designed, fabricated, assembled and tested. Techniques that control mask material etching are developed to fabricate a multi-layer silicon structure on HX-coupling manifolds. A segmental metal coating is applied on the fibers and the capillary for solderable areas and reduced...
Strained-Si technology is the Holy Grail for present semiconductor industry and is used extensively to boost the device performance, recently. However, the limitation of strained-Si technology has greatly perplexed us and need to investigate in detail. In this work, the low temperature ballistic measurement enables us to discriminate the origin of mobility enhancement under stress from the reduction...
This paper reports the design, fabrication and simulation of a novel array of micromachined electrodes with different lengths for use in auditory nerve prostheses. A 10times10 array is created in a 1 mm 2 on silicon with bulk micromachining technology. The electrode lengths vary from 200 mum to 400 mum. This design could provide access to most fascicles within the auditory nerve and thus allow stimulation...
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