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Articles 1 - 6 of 6
Full-Text Articles in Physics
The Simulation, Design, And Fabrication Of Optical Filters, John-Michael Juneau
The Simulation, Design, And Fabrication Of Optical Filters, John-Michael Juneau
Graduate Theses - Physics and Optical Engineering
The purpose of this thesis is to create a model for designing optical filters and a method for fabricating the designed filters onto a multitude of substrates, as well as to find ways to optimize this process. The substrates that were tested were quartz, glass slides, polycarbonate, and polyethylene terephthalate (PET). This work will account for variations in the deposition process and substrate cleaning method, in order to optimize the performance of the final optical filter. Several different filters were simulated and then fabricated. These filters included 3, 5, and 7-layer Bragg reflectors, 11-layer narrowband filters, and some variations of …
Fabrication And Characterization Of Thermo-Optic Mach-Zehnder Silicon Modulator, Yeongho Park
Fabrication And Characterization Of Thermo-Optic Mach-Zehnder Silicon Modulator, Yeongho Park
Graduate Theses - Physics and Optical Engineering
This thesis focuses on the modeling, design, and fabrication of the Thermo-Optic Mach-Zehnder Modulator, which is one of the simple active devices in silicon photonics. The Mach-Zehnder interferometer (MZI) was formed as an optical path on a silicon on insulator (SOI) wafer of 2040±80 nm thick, and the thermo-optic effect was used to modulate the infrared light of 1553 nm wavelength by controlling the temperature of the one arm of the MZI. To fabricate and understand the Si photonic device, the whole process from theory to the measurement setup is introduced. Additionally, all the fabrication details and some informative experiments …
Construction And Passive Q-Switching Of A Ring-Cavity Erbium-Doped Fiber Laser Using Carbon Nanotubes As A Saturable Absorber, Austin Scott
Construction And Passive Q-Switching Of A Ring-Cavity Erbium-Doped Fiber Laser Using Carbon Nanotubes As A Saturable Absorber, Austin Scott
Graduate Theses - Physics and Optical Engineering
The purpose of this thesis is to design, build, test, and achieve pulsed operation of a ring-cavity erbium-doped fiber laser using carbon nanotubes as a saturable absorber. The erbium-doped fiber is characterized first, cross-sections are calculated, and the gain value is determined. Subsequently, the ring cavity is constructed and the laser is operated in the continuous wave regime. Much time is then spent trying to characterize and utilize the carbon nanotubes successfully. Many dispersions are made using multiple solvents and dispersing media, various images are taken with both scanning electron and Raman microscopy, and attempts at purification are made. Saturable …
Nanoscale Tilt Measurement Using A Cyclic Interferometer With Phase Stepping And Multiple Reflections, Tahereh Naderishahab
Nanoscale Tilt Measurement Using A Cyclic Interferometer With Phase Stepping And Multiple Reflections, Tahereh Naderishahab
Graduate Theses - Physics and Optical Engineering
High accuracy tilt or roll angle measurement is required for a variety of engineering and scientific applications. Optical interferometry is normally used because it is non-contact and can measure tilt with a very high degree of accuracy. In this thesis, a cyclic interferometer has been developed with four mirrors to measure tilt angles as small as a few nanoradians. To measure the phase, a novel and simple method of phase shift by polarization was developed to enhance measurement sensitivity and accuracy. Since the cyclic interferometer is insensitive to external vibrations and turbulences, polarization phase step was accomplished with relative ease. …
Design And Implementation Of A Microscope Based On Magneto-Optic Effects, Yuxuan Liu
Design And Implementation Of A Microscope Based On Magneto-Optic Effects, Yuxuan Liu
Graduate Theses - Physics and Optical Engineering
When light passes through a medium that is subjected to a strong magnetic field, its polarization state may change due to magneto-optic effects such as Faraday rotation. An imaging system based on this polarization change is designed and constructed. The imaging system is built around a magnetic pulse field generator and able to detect polarization change of the incident light due to magneto-optic effects. An automated scheme is implemented using LabView. The program is developed to integrate all hardware and conduct multiple measurements automatically to enhance sensitivity. Basic testing measurements are conducted to evaluate the performance of the system. A …
Study Of Cu/Sio2/Cu Metamaterials: Design, Simulation, Fabrication, Testing, And Optical Applications, Minsu Oh
Graduate Theses - Physics and Optical Engineering
In the past few years, “metamaterials” have grabbed attention of researchers in both science and engineering. They have revealed great potentials to realize unusual optical applications such as flat lenses or frequency-selective performances with their unusual electromagnetic properties. In this project, Cu/SiO2/Cu metamaterials of diverse designs and parameters were studied towards discovering their unknown optical applications. From simulation work, it was found that some metamaterials exhibit a performance of a rectangle-shaped bandpass at optical frequencies. Their operational wavelength region can be adjusted by having a different scale of the structure or a different thickness of the constituent materials. This indicates …