C-Point singularities in Poincare beams
... our systematic studies focused mostly on γ = π and δ = 0. The vortices were generated via linear superpositions of concentric Laguerre-Gauss modes. We used the apparatus of Fig. 4a. Briefly, a vertically polarized laser beam from a helium-neon laser was expanded and spatially filtered to produce a p ...
... our systematic studies focused mostly on γ = π and δ = 0. The vortices were generated via linear superpositions of concentric Laguerre-Gauss modes. We used the apparatus of Fig. 4a. Briefly, a vertically polarized laser beam from a helium-neon laser was expanded and spatially filtered to produce a p ...
BEC: many weakly interacting particles Gross
... Can provide a single potential (not an array of potentials) with extreme, quasi-1D aspect ratio. Additional, weaker beams can change free-particle dispersion relation. ...
... Can provide a single potential (not an array of potentials) with extreme, quasi-1D aspect ratio. Additional, weaker beams can change free-particle dispersion relation. ...
Raman Spectroscopy - University of Arizona
... iris. The laser then irradiates the sample which is placed on a movable stage. Below is a cross section of the laser as it passes through each device before hitting the sample. ...
... iris. The laser then irradiates the sample which is placed on a movable stage. Below is a cross section of the laser as it passes through each device before hitting the sample. ...
Applications(2)
... • Optical fiber SPR probes present the highest level of miniaturization of SPR devices, allowing for chemical and biological sensing in inaccessible locations. The ability to transmit optical signals over a long distance makes the use of optical fibers very attractive. Fiber optic waveguides have a ...
... • Optical fiber SPR probes present the highest level of miniaturization of SPR devices, allowing for chemical and biological sensing in inaccessible locations. The ability to transmit optical signals over a long distance makes the use of optical fibers very attractive. Fiber optic waveguides have a ...
Retinal imaging using adaptive optics technology
... The same group showed reduced nerve fiber bundle widths both in clinically normal and abnormal areas of glaucomatous eyes associated with visual field defects. AO SLO thus may be useful for detecting early nerve fiber bundle abnormalities associated with loss of visual function.51 AOSLO has been fou ...
... The same group showed reduced nerve fiber bundle widths both in clinically normal and abnormal areas of glaucomatous eyes associated with visual field defects. AO SLO thus may be useful for detecting early nerve fiber bundle abnormalities associated with loss of visual function.51 AOSLO has been fou ...
Electromagnetically induced transparency
... (1) Suffers from laborious labeling processes, that may also interfere with the function of a biomolecule; (2) Quantitative analysis is challenging due to the fluorescence signal bias, as the fluorophores number on each molecule cannot be precisely controlled 2. Label-free detection Molecules are no ...
... (1) Suffers from laborious labeling processes, that may also interfere with the function of a biomolecule; (2) Quantitative analysis is challenging due to the fluorescence signal bias, as the fluorophores number on each molecule cannot be precisely controlled 2. Label-free detection Molecules are no ...
JOURNAL OF T O THE EUROPEAN OPTI CAL SOCI ETY
... A homocentric beam of light rays leaves an infinite small surface element dxdy containing the point ( x, y) of the planar source-object. After passing an entrance pupil of the optical system it is collected at the optically conjugated infinite small surface element dx 0 dy0 containing the point ( x ...
... A homocentric beam of light rays leaves an infinite small surface element dxdy containing the point ( x, y) of the planar source-object. After passing an entrance pupil of the optical system it is collected at the optically conjugated infinite small surface element dx 0 dy0 containing the point ( x ...
Optical fiber communication
... If symmetry is perfectly round and free from all stresses, both polarization modes would propagate at exactly the same speed, resulting in zero PMD. called (DGD) ...
... If symmetry is perfectly round and free from all stresses, both polarization modes would propagate at exactly the same speed, resulting in zero PMD. called (DGD) ...
Optical power - WordPress.com
... --laser technology deals with the concentration of light into a very small, powerful beam --there are 4 types of lasers 1)Gas lasers: Helium and Neon enclosed in a glass tube laser, CO2 lasers --Output is continuous mono chromatic (one colour) 2)Liquid lasers: organic dye enclosed in a gla ...
... --laser technology deals with the concentration of light into a very small, powerful beam --there are 4 types of lasers 1)Gas lasers: Helium and Neon enclosed in a glass tube laser, CO2 lasers --Output is continuous mono chromatic (one colour) 2)Liquid lasers: organic dye enclosed in a gla ...
A study of laser-induced self
... A sharp tip is scanned over the sample surface the tip is maintained at a constant force (to obtain height information), or height (to obtain force information) above the sample surface Tips are typically made from Si3N4 or Si, and extended down from the end of a cantilever An optical detect ...
... A sharp tip is scanned over the sample surface the tip is maintained at a constant force (to obtain height information), or height (to obtain force information) above the sample surface Tips are typically made from Si3N4 or Si, and extended down from the end of a cantilever An optical detect ...
Electromagnetic forces for an arbitrary optical trapping of a spherical
... missing mechanical measurements in the world of microorganisms and cells that could be correlated to biochemical information. The importance of understanding the optical forces in dielectric beads under different incident beam conditions comes from the fact that they are the natural transducer for f ...
... missing mechanical measurements in the world of microorganisms and cells that could be correlated to biochemical information. The importance of understanding the optical forces in dielectric beads under different incident beam conditions comes from the fact that they are the natural transducer for f ...
Unwrapping Hartman-Shack Images from Highly Aberrated Eyes
... • Is the key component for adaptive optics which can improve retinal image to the highest resolution (JZ Liang et al., JOSA A 1997) ...
... • Is the key component for adaptive optics which can improve retinal image to the highest resolution (JZ Liang et al., JOSA A 1997) ...
Optics - Frederiksen
... safer. The spectral tube is mounted from the front in the insulated holders with electrodes, where the lower holder is spring loaded parallel to the tube axis. The holder is provided with a power supply which can deliver 6 kV DC at max. 2 mA to the electrodes built into the base of the insulated hol ...
... safer. The spectral tube is mounted from the front in the insulated holders with electrodes, where the lower holder is spring loaded parallel to the tube axis. The holder is provided with a power supply which can deliver 6 kV DC at max. 2 mA to the electrodes built into the base of the insulated hol ...
A Novel Modified Omega-K Algorithm for Synthetic Aperture Imaging Lidar through the Atmosphere
... sco n v = sa ⊗ sa , ref = exp ( jπ ka , ref tm2 ) ∫ sa ⋅ exp ( jπ ka , ref τ 2 ) ⋅ exp ( − j 2π ka , ref τ tm ) dτ ...
... sco n v = sa ⊗ sa , ref = exp ( jπ ka , ref tm2 ) ∫ sa ⋅ exp ( jπ ka , ref τ 2 ) ⋅ exp ( − j 2π ka , ref τ tm ) dτ ...
Optical Measurements of Pollution Dispersion at
... or to visible wavelengths since the SNR would be worse, while the eye safety limits would be several orders of magnitude lower. We should note that for the incoherent system represented by RASCAL, only the first of the above terms is relevant. For simple backscatter, shorter wavelengths are better. ...
... or to visible wavelengths since the SNR would be worse, while the eye safety limits would be several orders of magnitude lower. We should note that for the incoherent system represented by RASCAL, only the first of the above terms is relevant. For simple backscatter, shorter wavelengths are better. ...
N24108113
... equation (17) on the basis of numerical calculations. We plot -V Curves (dispersion curves) of the proposed optical wave-guides by which propagation properties of different modes can be analyzed. For plotting the dispersion curves, the eigen values of are obtained by solving characteristics equa ...
... equation (17) on the basis of numerical calculations. We plot -V Curves (dispersion curves) of the proposed optical wave-guides by which propagation properties of different modes can be analyzed. For plotting the dispersion curves, the eigen values of are obtained by solving characteristics equa ...
Image Quality Criteria - University of Arizona
... such as wave front error (WFE), point spread function (PSF), and modulation transfer function (MTF). During the design of the optical system the metrics chosen to define the image quality are usually modeled. During this modeling process an error analysis is performed in order to quantify the system ...
... such as wave front error (WFE), point spread function (PSF), and modulation transfer function (MTF). During the design of the optical system the metrics chosen to define the image quality are usually modeled. During this modeling process an error analysis is performed in order to quantify the system ...
Research on the Design of an Optical Information Storage Sensing
... To be compatible with the multilayer disc structure, the DOE is designed so that the zeroth-order beam focuses on the servo layer for focusing and tracking, while the first-order diffraction beams focuses on the recording layer. The two beams are controlled and focus on the corresponding layers inde ...
... To be compatible with the multilayer disc structure, the DOE is designed so that the zeroth-order beam focuses on the servo layer for focusing and tracking, while the first-order diffraction beams focuses on the recording layer. The two beams are controlled and focus on the corresponding layers inde ...
Effects of Spatial Coherence on the Angular Distribution of Radiant
... multimode lasers, and fields that have passed through a random medium such as the turbulent atmosphere. Hardly any studies have been devoted to this more general case (see, however, [6]). The extinguished power due to scattering of random fields on a random medium has been analyzed in [7,8], and cer ...
... multimode lasers, and fields that have passed through a random medium such as the turbulent atmosphere. Hardly any studies have been devoted to this more general case (see, however, [6]). The extinguished power due to scattering of random fields on a random medium has been analyzed in [7,8], and cer ...
lecture 3 Introduction to Laser
... Pumping achieves Population Inversion periodically for short periods Pulsed Laser with controlled Losses: Concentration of energy reaches a maximum so that they give rise to giant pulses of short duration. Peak power is in the order of 100 Watts or more ...
... Pumping achieves Population Inversion periodically for short periods Pulsed Laser with controlled Losses: Concentration of energy reaches a maximum so that they give rise to giant pulses of short duration. Peak power is in the order of 100 Watts or more ...
61
... If the relative effect of SPM and GVD are controlled just right, and the appropriate pulse shape is chosen the pulse compression resulting from SPM can exactly offset the pulse broadening effect of GVD.Depending On the particular shape chosen, the pulse either does not change its shape as it propaga ...
... If the relative effect of SPM and GVD are controlled just right, and the appropriate pulse shape is chosen the pulse compression resulting from SPM can exactly offset the pulse broadening effect of GVD.Depending On the particular shape chosen, the pulse either does not change its shape as it propaga ...
Interference of Light waves Wave Optics
... If the thin film is between two different media, one of lower index than the film and one of higher index, the conditions for constructive and destructive interference are reversed With different materials on either side of the film, you may have a situation in which there is a 180o phase change at ...
... If the thin film is between two different media, one of lower index than the film and one of higher index, the conditions for constructive and destructive interference are reversed With different materials on either side of the film, you may have a situation in which there is a 180o phase change at ...
Optical coherence tomography
Optical coherence tomography (OCT) is an established medical imaging technique that uses light to capture micrometer-resolution, three-dimensional images from within optical scattering media (e.g., biological tissue). Optical coherence tomography is based on low-coherence interferometry, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium. Confocal microscopy, another optical technique, typically penetrates less deeply into the sample but with higher resolution.Depending on the properties of the light source (superluminescent diodes, ultrashort pulsed lasers, and supercontinuum lasers have been employed), optical coherence tomography has achieved sub- micrometer resolution (with very wide-spectrum sources emitting over a ~100 nm wavelength range).Optical coherence tomography is one of a class of optical tomographic techniques. A relatively recent implementation of optical coherence tomography, frequency-domain optical coherence tomography, provides advantages in signal-to-noise ratio, permitting faster signal acquisition. Commercially available optical coherence tomography systems are employed in diverse applications, including art conservation and diagnostic medicine, notably in ophthalmology and optometry where it can be used to obtain detailed images from within the retina. Recently it has also begun to be used in interventional cardiology to help diagnose coronary artery disease. It has also shown promise in dermatology to improve the diagnostic process.