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.
Results
Showing 1 to 15 of 15 for “"Beam Splitters"”.
-
50%-50% Beam Splitters Using Transparent Substrates Coated by Single- or Double-Layer Quarter-Wave Thin Films
A pair of light beams that have orthogonal polarizations and equal intensity can be generated through reflection and refraction of a monochromatic light at a dielectric surface. Sytematic procedures to design beam splitters which can produce such output light beams are described in this thesis. Two …
-
Embedded Multilayer Thin Film Stacks as Polarizing Beam Splitters and Wave Retarders Operating under Condition of Frustrated Total Internal Reflection
… function as efficient polarizers or polarizing beam splitters (PBSs) under conditions of FTIR over an extended range of incidence angles. For a given set of refractive indices, all possible solutions for the thicknesses of the layers that suppress the reflection of p-polarized light at a …
-
Diffractive electron mirror for use in quantum electron microscopy
… diffraction gratings as lossless electron beam splitters is proposed. In this thesis, diffractive electron mirrors were fabricated by integrating one-dimensional diffraction gratings with tetrode electron mirrors. Optical interference lithography was used to fabricated silicon diffraction …
-
Unitary transformations on temporal modes using dispersive optics for Boson Sampling and quantum simulation
… on a spatial basis set using a system of beam splitters and phase shifters. We present methods which allow orders of magnitude increase in the number of modes in linear optics experiments by moving from spatial encoding to temporal encoding and using dispersion. This enables significant …
-
Efficient and coherent frequency conversions and nonlinear interference in optical parametric and atomic Raman processes
… conversion efficiency of a single pass of the beams is compared with that of double passes. Finally, a beat signal is observed between the two Stokes fields and its Fourier transform shows that the frequency difference is caused by the AC Stark effect. ^ Precision phase measurement is …
-
Laser guitar
… The design is to replace the strings with beams of laser that run through a line of beam splitters at each fret, each of which sends a beam onto a photoresistor. By blocking the beam at different frets, the current through the resistors uniquely determines what fret is pressed. The …
-
A Prototype Polarimetric Camera for Unmanned Ground Vehicles
… cameras are very expensive. It uses multiple beam splitters to split incoming light into four machine vision cameras. In front of each machine vision camera is a linear polarizing filter that is set to a specific orientation. Using the data from each camera, the Stokes vector can be calculated …
-
Physics and application of impurity plume dispersal as an edge plasma flow diagnostic on the Alcator C-Mod tokamak
… to gated, intensified CCD cameras through beam-splitters, allowing for the simultaneous acquisition of C⁺¹ and C⁺² emission. Plume structure is observed to depend on local values of electron density and temperature, background parallel flow (v[sub][parallel]), and radial electric field …
-
Quantum metrology with Bose-Einstein condensates
… into an optical ring lattice, multiport beam splitters are created through a simple raising and lowering of potential barriers between sites. We then use these ‘splitters’ to create an atomic gyroscope. We demonstrate how to create several quantum states in the gyroscope, all capable of …
-
Integrated optical components for quantum key distribution
… achieved by fabricating the sites using electron-beam lithography and wet etching. Studies were also carried out to investigate the effect of the wafer’s growth temperature on the nanowire formation. Finally, a model was proposed for realising a chip-scale QKD system using photonic crystals as a …
-
An integrated heterodyne interferometer with on-chip detectors and modulators
… The device is constructed of a series of on-chip beam-splitters, modulators, and germanium detectors in a Michelson-like configuration. The interferometer achieves a noise-limited position resolution of approximately 2 nm in a 1 mm by 6 mm footprint. The vibrometer and LIDAR modes; two modalities …
-
Planetary Systems in Polarized Light: Debris Disk Observations and Instrumentation
… that can simultaneously act as polarizing beam splitters and as spectral dispersive elements. Moreover, they can be designed for high diffraction efficiency across a broad wavelength range. These features make polarization gratings useful for many types of astronomical observations. We have …
-
Interferometry with higher-dimensional gauge-symmetric optical multiports
… system: the passive scattering centers--such as beam-splitters or other material distributions--which redistribute the energy carried by incident photons, and the phase delays that freely propagating photons experience between pairs of these scattering centers. When an interferometer is modeled …
-
Polarizing Optical Devices Based on Embedded One-Dimensional Subwavelength-Structured Photonic-Crystal Layers
… procedure for the design of a polarizing beam splitter (PBS) that uses a form-birefringent, subwavelength-structured, one-dimensional photonic-crystal layer (SWS 1-D PCL) embedded in a high-index cubical prism is presented. The PBS is based on index matching and total transmission for the …
-
Opto-VLSI-based adaptive optical power splitter/combiner for next generation dynamic optical telecommunication networks
The demand for optical power splitters is growing globally, due to the rapid deployment of fibre-to-the-premises, optical metropolitan area network (MAN), and active optical cables for TV/Video signal transport. Optical splitters play an important role in passive optical network (PON) technology by …