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 13 of 13 for “"Acousto-optic modulator"”.
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Studies on hybrid optical bistable devices using an acousto-optic modulator
Acousto-optic hybrid bistable devices have been studied previously. However, previous studies are limited only to the first-Bragg regime involving two diffracted orders. No actual comparison has been made between experimental results and theoretical predictions. A model including both acousto-optic …
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Chromatic dispersion measurement in single-mode optical fibers by acousto-optic modulation and phase detection
… to measure chromatic dispersion in single-mode optical fibers with near point wavelength resolution is described. Differential propagation constant data for the test fiber is collected by using an acousto-optic modulator to frequency-shift laser light passed to an optical heterodyne. Theoretical …
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Design and implementation of a fiber optic doppler optical coherence microscopy system for cochlear imaging
… thesis, the design and implementation of a fiber optic Doppler optical coherence microscopy (FO-DOCM) system for cochlear imaging applications is presented. The use of a fiber optic design significantly reduces system size and complexity and the construction of a novel alignment and …
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Techniques for low coherence pulsed Doppler lidar
… that is an alternative to the currently favoured acousto-optic modulator. The first approach presented is a design in which a sample of the transmitted pulse is stored in a fibre optic ring resonator of pathlength longer than the pulse. Each time the pulse circulates the storage loop a fraction is …
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Development of Optoelectronic Devices and Computational Tools for the Production and Manipulation of Heavy Rydberg Systems
… and characterization of a driver for an acousto-optic modulator is presented which achieves a maximum diffraction efficiency of 54 % at 200 MHz, using a commercial modulator. A novel design is presented for a highly sensitive optical spectrum analyzer for displaying laser mode structure …
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Minimization of aberrations for the Mark IV holographic architecture using optical software modeling
… image by illuminating a guided wave acousto-optic modulator, upon which is written a multiplexed acoustic hologram, with red, green, and blue lasers. Despite remarkable gains attained during Mark IV's inception, the reconstructed images still possess undesirable aberrations. This …
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Techniques for Mass Determination of Airborne Micro-Particles in an Optical Dipole Force Trap
… of airborne particles confined in free space optical dipole force traps. This technique employs an ultrafast CMOS sensor with a wide field of view to image the real time motion of trapped particles on timescales in which diffusive Brownian motion predicted by Einstein makes a transition to …
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A stabilized master laser system for differential absorption LIDAR.
… DIAL observatory. With two continuous wave optical wavelengths stabilized, a pulse is formed using an Acousto-Optic Modulator (AOM) to switch light out of each control system to form the transmitted pulse. The control systems employ synchronous reference signal detection that suppresses …
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Three-Dimensional Fluorescence Microscopy by Optical Scanning Holography
… and fluorescence techniques become standard in optical microscopy, novel approaches to 3D fluorescence microscopy are emerging. One such approach is based on the incoherent holography technique called optical scanning holography (OSH). The main advantage of OSH-based microscopy is that only a …
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Study of Multiple ASE-Noise Effects and A Filtering Solution For Soliton Propagation Through Optical Fibers
… been performed on the use of soliton signals in optical communication systems. This potentially allows an optical signal to propagate along a fiber line with minimal need for signal restoration through electrical conversion. Various sources of noise can cause a soliton signal to become distorted …
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Efficient, high-power operation of CW Yb:YAG and Q-switched Nd:YAG planar waveguide lasers
… Q-switched using a hybrid unstable resonator and acousto-optic modulator. A Yt- terbium doped YAG planar waveguide laser was side-pumped using two laser diode stacks with a total of 800 W incident pump power. The Nd:YAG planar waveguide laser has a core 200 um thick and was face pumped with ten …
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Photoassociative Spectroscopy of Ultracold Argon and Krypton Confined in a Magneto Optical Trap
… [2] but we attribute these to artifacts from an acousto-optic modulator and not as arising from molecular structure.</p>
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Wavelength tuneable frequency domain photon migration spectrometer for tissue-like media
… density wave inside the medium depends on its optical properties. Hence by measuring the amplitude and phase of the photon density wave the optical properties of the medium can be estimated. This is the basic working principle of a frequency domain photon migration spectrometer. Frequency …