Global ETD Search
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 45 for “"Homodyne"”.
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Plasma Electron Density Measurement Using Homodyne and Heterodyne Interferometers
… Two different interferometer designs, homodyne and heterodyne are studied in two fusion reactor systems namely Tokamak and flow through Z-pinch device.
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Enhanced squeezing in homodyne detection via local-oscillator optimization
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Homodyne studies of light scattered from a turbulent water jet.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1969.
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Homodyne High-harmonic Spectroscopy: Coherent Imaging of a Unimolecular Chemical Reaction
… imposed by the strong driving laser field, homodyne detection of attosecond pulses from excited molecules undergoing dynamics is achieved, the signal from unexcited molecules acting as the reference local oscillator. First, applying time-resolved high-harmonic spectroscopy to the …
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A 1.25 gigabit per second binary-phase-shift-keyed optical homodyne receiver
Thesis (S.B. and S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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8-Port Homodyne Detection of EIT-enhanced Cross-phase Modulation Using Broadband Signal Pulses
This thesis summarizes my work on the interactions between light and matter in the context of optical quantum information processing. I have designed and implemented a phase-sensitive detection scheme for optical-frequency electromagnetic fields, which has been used to measure μrad phase shifts on …
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Fast Fluorescence Lifetime Imaging Using a Full-Field Homodyne System with Applications in Biology
… lifetime imaging system based on the homodyne technique was built and used for several applications. Also contained herein is the basic theory and background for fluorescence lifetime imaging, as well as data analysis of lifetime distributions. The fast, easy-to-use lifetime imager has …
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Quadrature-point stabilization of Mach-Zehnder interferometers
… magnetometers can be performed using either homodyne or heterodyne techniques. Higher sensitivities have been achieved using homodyne rather than heterodyne techniques, but with homodyne demodulation there exists the inherent problem of quadrature-point stabilization. Presented here is a …
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High efficiency photodetection below the quantum noise limit
… have constructed to form a balanced homodyne detector to detect squeezed light. The detectors have quantum efficiencies of 85% and 90%, a bandwidth of 1MHz, and a dark noise of ... at 1MHz.
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Time-Offset Fractional-N PLLs for Heterodyne FMCW SAR
… phenomena which limit the sensitivity of their homodyne counterparts, and enable certain inter-antenna feed-through suppression techniques. Despite these advantages, homodyne receivers are more prevalent owing to advantages in size, weight and cost. Designed to address this dilemma, the miloSAR …
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Improving the Security of Continuous Variable Quantum Random Number Generators
… part, a high bandwidth, low noise balanced homodyne detector for quantum information applications is developed. The detailed characterisation of this balanced homodyne detector leads to the identification of several implementation security flaws, which could compromise the security of a QRNG …
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The measurement, creation and manipulation of quantum optical states via photodetection
… numbers at optical sideband frequencies using homodyne detection. We use our technique to provide a direct comparison to photon-counting measurements and observe that our technique exhibits superior speed, dynamic range and mode selectivity compared to photon counters. Our analysis also rejects …
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COHERENT DETECTION OF SCATTERED LIGHT BY SUBMICROMETER AEROSOLS.
… at the focal point of a gathering lens. Optical homodyne detection can then be used to measure the extent of the phase shift due to the particle. Scattering mechanisms can relate the phase shift to particle diameter so particle size can be determined. An optical inspection region is given by the …
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Limitations and Improvement of Subcarrier Multiplexed Systems over Optical Fiber
… at the optical carrier in order to perform homodyne detection. However, the local oscillator is modulated by a term equal the subcarrier frequency of interest. This is then a dual-frequency optical local oscillator. By controlling the phases of the local oscillator and the local subcarrier …
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Quantum state reconstruction and tomography using phase-sensitive light detection
… not it will be capable to perform non-demolition homodyne detection of squeezed light in a high-finesse cavity QED setup with an ensemble of Cesium atoms coupled to the cavity. After quantifying sources of noise, the photodiode efficiency, we perform a series of measurements of low photon number …
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Complete Temporal Characterization of Single Photons
… function of the photocurrent from a balanced homodyne detector at multiple local oscillator frequencies. We lay the theoretical foundation for our work and describe the experimental methods involved in detail. We show the results of testing our method on single photons heralded from bi-photons …
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A Solid-State Phase Camera for Advanced Gravitational Wave Detectors
… mirrors, limited by the phase resolution. In homodyne readout, the performance can reach up to 0.1 nm, limited by the modulation amplitude sensitivity.</p>
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GHz Gravitational Wave and THz Dark Matter Detectors: Analysis and Simulation
… and weaker astrophysical sources. A promising homodyne detector utilizes the inverse Gertsenshtein effect, where HFGWs convert to photons in a magnetic field. A physical analysis highlights intrinsic noise and other complications. Dark matter (DM) axions can similarly be detected through the …
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