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 9 of 9 for “"Numerical aperture (NA)"”.
-
A Vertically Loaded Diamond Microdisk Resonator (VLDMoRt) towards a Scalable Quantum Networks
… of vertically-loaded diamond microdisk resonator (VLDMoRt). It couples to a nitrogen-vacancy (NV) center in diamond for efficient collection of fluorescence emission into low numerical aperture (NA) free-space modes. The VLDMoRt achieves a Purcell enhancement of 172 with 39% of the emitted …
-
Scanning standing-wave illumination microscopy : a path to nanometer resolution in X-ray microscopy
… can image unsectioned hydrated cells with nanometer resolution. In practice, however, the resolution of x-ray microscopes is limited to approximately 20 nm due to difficulties in the construction of high numerical-aperture (NA) x-ray focusing optics. This thesis represents a step on a new …
-
Advanced fibre-based endoscopy for biophotonics applications
… with footprints far bellow those of conventional endoscopes, as well as enhanced spatial resolution up to the diffraction limit de-termined by the numerical aperture (NA) of the fibre.<br/><br/>In this Thesis, high-resolution focussing is demonstrated with unprecedented ability across novel …
-
Resolution improvement in optical microscopy by use of multi-beam interferometric illumination
In conventional optical microscopy, the numerical aperture (NA) of the objective lens intrinsically links the resolution, depth of field (DOF), working distance (WD) and field of view (FOV). In a diffraction-limited system, changing the NA to improve resolution is not possible without degrading the …
-
Raman Cooling to High Phase Space Density
… condensates (BECs) a few decades ago. Traditionally such experiments have relied heavily on evaporation to produce their quantum degenerate Bose or Fermi gases. Although evaporation has proven to be effective for many atomic species, it leads to the loss of many trapped atoms and is generally …
-
Optical Performance and Prototyping of a Liquid Lens Laser Communications Transceiver
Laser communications can enable more efficient and higher bandwidth communications than conventional radio frequency (RF) systems. Free-space optical communications systems' beams are typically narrower in divergence and require precise pointing, acquisition, and tracking (PAT) systems to establish …
-
Multi-Watt, diode-pumped planar waveguide lasers
… pump source, a waveguide with a relatively large numerical aperture (NA) is required. A selection of suitable waveguide fabrication techniques, including liquid phase epitaxy (LPE), pulsed laser deposition (PLD) and direct bonding, were investigated. A Nd:GGG on YAG waveguide fabricated by PLD was …
-
Liquid Crystal Optics For Communications, Signal Processing And 3-d Microscopic Imaging
… solve challenging problems in RF and photonic signal processing, freespace and fiber optic communications and microscopic imaging. These include free-space optical scanners for military and optical wireless applications, variable fiber-optic attenuators for optical communications, photonic control …
-
Měření numerické apertury
Bakalářská práce ukazuje použití měřicího systému SOMS pro měření numerické apertury různých druhů optických vláken. Dále je v práci popsán a odzkoušen měřicí přípravek, umožňující modifikovat systém SOMS pro měření vyzařovacích charakteristik a úhlů LED diod o průměrech 3mm, 5mm a 8mm.