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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 149 for “"Photodiode"”.
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Fabrication and characterization of back illuminated CMOS photodiode array
… development in low-cost CMOS technology, silicon photodiodes are currently recognized as promising choice for the imager core. In this research, the arrays of back illuminated photodiodes were designed, fabricated and demonstrated with CMOS imager fabrication process on silicon wafers. The main …
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A Microprocessor-Controlled Photodiode Array Measurement System for Analytical Spectrometers
Made available in DSpace on 2014-12-13T20:10:16Z (GMT). No. of bitstreams: 1 7804077.pdf: 16547288 bytes, checksum: 2ffa66ff6110c523efed511eefa9e432 (MD5) Previous issue date: 1977
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Characterization and modeling of small area Hg1-x̳Cdx̳Te photodiode spatial response
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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LIGO photodiode characterization and measurement of the prestabilized laser intensity noise
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.
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Linear Mode CMOS Compatible p-n Junction Avalanche Photodiode for Smart-lighting Applications
… integrated waveguide detectors and avalanche photodiodes (APDs). This thesis focuses on the APD design and fabrication component of the sensing capability required by smart-lighting systems. Silicon CMOS compatible APDs are expected to provide high-speed and high-sensitivity sensors in terms …
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High speed photodiode and 90° optical hybrid for 2 µm optical communication systems
… and performance characterizations of high speed photodiodes and associated 90° optical hybrids at 2 µm. All types of the photodiode devices have been packaged with the support from the package group for high speed test to prove the ability to work in the real optical communication system. For the …
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Perovskite-nanocrystal-enhanced vertically stacked photodiode image sensor for wavelength-resolved UV imaging
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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Fast photodiode diagnostic on Alcator C-Mod tokamak to study the plasma edge/SOL structure
… The toroidally looking views are coupled to fast photodiode amplifier circuits that record the D, brightness at a rate of 1 MHz. Two plasma-directed gas puffs are employed at the inboard and outboard plasma edges to enhance the emission at the desired toroidal locations. The absolutely calibrated …
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Improved velocity data in circular jets using an avalanche photodiode-based 2-component point Doppler velocimeter
An existing Point Doppler Velocimeter (pDv) has been modified in an effort to improve the RMS velocity results. Improvements have been made by reducing the probe volume size by focusing the incident laser beam, thereby reducing the effects of spatial averaging on the mean and RMS velocity …
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Development of high-speed pin photodiode and vertical-cavity surface-emitting laser for extended-reach optical communications
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
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Modeling of photocurrent spectra induced by nonlinear absorption in high-indium-content iii-nitride disk-in-wire photodiode
… cascade laser (TI-QCL) and quantum disk-in-wire photodiode. We study the injection efficiency in the superlattice region in the TI-QCL by using non-equilibrium Green's function (NEGF). As for the quantum disk-in-wire photodiode, we developed a band structure calculation method based on an …
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Development of High-performance Flexible Poly-Si Thin Film Transistors and GaAs PIN Photodiode for Advanced X-ray Imaging
… (MILC) thin film transistors (TFTs) and GaAs PIN photodiodes. Unlike traditional flat panel detector with the passive pixel sensor (PPS) design, the APS design allows charge amplification before passing charge onto external readout circuit. A charge gain > 30 can be easily achieved which …
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CMOS digital pixel sensor array with time domain analogue to digital conversion
… and the processing logic. Each pixel contains a photodiode sensor, a comparator, memory and addressing logic. The photodiode sensor operates in integrating mode, where the photodiode junction capacitance is first charged to an initial voltage, and then discharged by the photodiode leakage …
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Detection Statistics Of Multiple-Pulse Optical Signals Through Atmospheric Turbulence
… for photoelectron generation in the receiver's photodiode and for the atmospheric turbulence channel enable the derivation or numerical calculation of the probability of miss, which is crucial for determining the signal length and detection threshold. The two commonly used types of photodiodes …
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Digital Sun Sensor Design for Nanosatellite Applications
… design of a Sun sensor, based on the orthogonal photodiode array design approach, applicable for nanosatellites and other small spacecraft is proposed. A common and well-known strategy of application of a geometrical aperture mask on the light detectors is improved upon and utilised in a …
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CMOS Active Pixel Sensors for Digital Cameras: Current State-of-the-Art
… commonly used APS in consumer applications, i.e. photodiode based APS. We also present an approach for technology scaling of the devices in photodiode APS to present CMOS technologies. Finally, I present the most modern CMOS APS technologies by reviewing different design models. The design of the …
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An optical data receiver for integrated photonic interconnects
… optical links. Both the optical receiver and the photodiode are monolithically-integrated in the same CMOS substrate. The highly-digital receiver senses the photodiode current using a regenerative cross-coupled latch. The photodiode is modelled as an ideal current source with a capacitance in …
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Energy and Data Conversion Circuits for Low Power Sensory Systems
… This dissertation proposes a fractal-based photodiode fabricated on standard CMOS process as an energy harvesting device with increased efficiency. Experiments show that, the fractal based photodiodes are 6% more efficient compared to the conventional square shaped photodiode. The fractal …
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Solid-State Impact-Ionization Multiplier
… performed by connecting the device to a silicon photodiode, indium-gallium-arsenide photodiodes, and a function generator to demonstrate its compatibility with arbitrary current sources. Current gains above 100 along with pre-amplified leakage currents of less than 10 nA were measured. This …
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Very High Speed Coherent Passive Optical Networks
… are considered, one based on a balanced photodiode and one on a single ended photodiode. For further improvement of the power budget, linear and non-linear pre-distortion techniques are in- vestigated. The solution with the balanced photodiode exceeds the E1 class power budget requirement …
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