4.1 Comparison of theory and WaveTrain PCR simulation: results
... (temporal) coherence, or equivalently put, is polychromatic to a certain extent. It is desired with the PCR numerical model to accurately simulate the propagation and speckle behavior when the longitudinal coherence varies over the domain from a few object macroscopic depths to a relatively small fr ...
... (temporal) coherence, or equivalently put, is polychromatic to a certain extent. It is desired with the PCR numerical model to accurately simulate the propagation and speckle behavior when the longitudinal coherence varies over the domain from a few object macroscopic depths to a relatively small fr ...
Photonic crystal slot nanobeam slow light
... distance between the symmetric holes 共650 nm兲, diameter of the holes 共310 nm兲 and the thickness of the membrane 共220 nm兲. Since the nanobeam is intended as a liquid sensor, the bandstructure calculation from MPB is performed for an environment refractive index of 1.333, corresponding to water, and i ...
... distance between the symmetric holes 共650 nm兲, diameter of the holes 共310 nm兲 and the thickness of the membrane 共220 nm兲. Since the nanobeam is intended as a liquid sensor, the bandstructure calculation from MPB is performed for an environment refractive index of 1.333, corresponding to water, and i ...
Dependences of the group velocity for
... As shown in Eq. (3), the dragging by the slower SH wave in case of γ<0, is proportional to the parameter δ because of increased dragging with larger GVM; And it is also inversely proportional to Δk2, due to the lower amount of SH wave generated from the FF wave and less efficient dragging for increa ...
... As shown in Eq. (3), the dragging by the slower SH wave in case of γ<0, is proportional to the parameter δ because of increased dragging with larger GVM; And it is also inversely proportional to Δk2, due to the lower amount of SH wave generated from the FF wave and less efficient dragging for increa ...
Light Polariser
... As with any form of energy, light can be produced in one place and have an effect in another place, which may be very distant from where it was produced. In this respect it is similar to a tennis ball that carries energy from the place where it is hit to the place where it lands. A sound wave also c ...
... As with any form of energy, light can be produced in one place and have an effect in another place, which may be very distant from where it was produced. In this respect it is similar to a tennis ball that carries energy from the place where it is hit to the place where it lands. A sound wave also c ...
pdf
... phthisis bulbi are trauma, infection and other inflammatory processes, chronic retinal detachment, radiation, persistent hyperplastic primary vitreous and retinoblastoma. The eyeball is not functioning. (Fig. 1, 2) Optic drusen are abnormal globular concretions of protein and calcium salts which acc ...
... phthisis bulbi are trauma, infection and other inflammatory processes, chronic retinal detachment, radiation, persistent hyperplastic primary vitreous and retinoblastoma. The eyeball is not functioning. (Fig. 1, 2) Optic drusen are abnormal globular concretions of protein and calcium salts which acc ...
Excimer Laser Instrumentation - augenarzt
... With the advent of customized treatments, technical requirements are changing. Huang and co-workers showed that corrections of optical errors up to the fourth order require spot sizes of not more than 1 mm in diameter.3 Recently published results of large studies confirm the superiority of wave fron ...
... With the advent of customized treatments, technical requirements are changing. Huang and co-workers showed that corrections of optical errors up to the fourth order require spot sizes of not more than 1 mm in diameter.3 Recently published results of large studies confirm the superiority of wave fron ...
An ultrafast reconfigurable nanophotonic switch using
... pump, corresponding to a modulation contrast of 4.3 dB. This reduction of the shaped spot is much stronger than that of the background intensity, which is reduced by only half this amount. In addition to the ultrafast effect, both the peak and the background intensities show a Tpump/Tnopump ratio of ...
... pump, corresponding to a modulation contrast of 4.3 dB. This reduction of the shaped spot is much stronger than that of the background intensity, which is reduced by only half this amount. In addition to the ultrafast effect, both the peak and the background intensities show a Tpump/Tnopump ratio of ...
Semiconductor Lasers: Device Physics and Applications
... of the voltage drop within the device changed. The relatively large threshold current is primarily due to current spreading, as well as the undercutting of the oxide during processing, resulting in a wider injection region than the nominal 5 µm width of the device. Similar, but wider devices without ...
... of the voltage drop within the device changed. The relatively large threshold current is primarily due to current spreading, as well as the undercutting of the oxide during processing, resulting in a wider injection region than the nominal 5 µm width of the device. Similar, but wider devices without ...
Femtosecond self-guided atmospheric light strings
... produce a relatively dense plasma. For shorter femtosecondduration laser pulses, the situation is quite different, however. Multiphoton ionization, an essentially instantaneous rather than cumulative electron generation mechanism, begins to dominate. In addition, dispersion in the time direction can ...
... produce a relatively dense plasma. For shorter femtosecondduration laser pulses, the situation is quite different, however. Multiphoton ionization, an essentially instantaneous rather than cumulative electron generation mechanism, begins to dominate. In addition, dispersion in the time direction can ...
Optic Nerve Head Drusen and Glaucoma
... Ultrastructurally, drusen are degenerative axonal byproducts. Although the exact etiology of optic nerve head drusen is unknown, investigators have postulated that tight scleral foramina impede normal axoplasmic flow and lead to stasis and, ultimately, extrusion of metabolic debris in the extracellu ...
... Ultrastructurally, drusen are degenerative axonal byproducts. Although the exact etiology of optic nerve head drusen is unknown, investigators have postulated that tight scleral foramina impede normal axoplasmic flow and lead to stasis and, ultimately, extrusion of metabolic debris in the extracellu ...
Diffraction of light by a single slit and gratings
... a plot showing the positions for both slits. Calculate the corresponding angles min and max and determine the wavelength from each of the angles. Determine an average wavelength together with a statistical error. Compare the thus determined wavelength with the one of the helium neon laser. Discuss ...
... a plot showing the positions for both slits. Calculate the corresponding angles min and max and determine the wavelength from each of the angles. Determine an average wavelength together with a statistical error. Compare the thus determined wavelength with the one of the helium neon laser. Discuss ...
Glaucoma Workup Review: From A to OCT By: Nathan Rains, OD
... time (~5 min per eye) Less variable Similar results ...
... time (~5 min per eye) Less variable Similar results ...
00800001a2_9.pdf
... The development of optical interferometry is closely linked with the history of wave optics. In 1690 Huygens put forward the basis for the theory we use today. In 1801, Thomas Young performed a fundamental experiment for demonstrating interference and the wave nature of light, see Fig. 9.1.26. He us ...
... The development of optical interferometry is closely linked with the history of wave optics. In 1690 Huygens put forward the basis for the theory we use today. In 1801, Thomas Young performed a fundamental experiment for demonstrating interference and the wave nature of light, see Fig. 9.1.26. He us ...
All-angle negative refraction and imaging in a visible region
... dielectric matrix. When the separation between the nanowires is much smaller than the incident wavelength, these structures can be characterized as indefinite media, whose effective permittivities perpendicular and parallel to the wires are opposite in signs. Under this condition, the dispersion dia ...
... dielectric matrix. When the separation between the nanowires is much smaller than the incident wavelength, these structures can be characterized as indefinite media, whose effective permittivities perpendicular and parallel to the wires are opposite in signs. Under this condition, the dispersion dia ...
Little big photon - Research Laboratory of Electronics
... then on average an equal number of atoms is found pointing along the positive and negative z directions. However, in any particular realization of the spin measurement along z, there are fluctuations in the distribution, since any atom can be found with equal probability in the states up or down. Th ...
... then on average an equal number of atoms is found pointing along the positive and negative z directions. However, in any particular realization of the spin measurement along z, there are fluctuations in the distribution, since any atom can be found with equal probability in the states up or down. Th ...
SEEING THE EYE IN A NEW LIGHT
... Meditec, Inc., Dublin, CA) are designed to give the best possible view of the red reflex. They incorporate Stereo Coaxial Illumination (SCI) technology to provide steady, high-quality recognition of detail. In my opinion, this technology is a remarkable innovation. It generates a bright, homogenous ...
... Meditec, Inc., Dublin, CA) are designed to give the best possible view of the red reflex. They incorporate Stereo Coaxial Illumination (SCI) technology to provide steady, high-quality recognition of detail. In my opinion, this technology is a remarkable innovation. It generates a bright, homogenous ...
Design and investigation of properties of nanocrystalline diamond
... According the calculation mentioned above it was expected that the deposited NCD film having a thickness of 380 nm will support 2 TE modes at the wavelengths of 964 nm and shorter. At the longer wavelengths there would be noticeable one TE mode only. However, the measurement showed that the deposite ...
... According the calculation mentioned above it was expected that the deposited NCD film having a thickness of 380 nm will support 2 TE modes at the wavelengths of 964 nm and shorter. At the longer wavelengths there would be noticeable one TE mode only. However, the measurement showed that the deposite ...
Characterization of acceptance angles of small circular
... the exact relationship cannot be assumed especially in the subwavelength regime. Since the NA of an imaging system is closely related to the resolving power of the system, it is important to characterize the relationship of the NA with diameter of the circular apertures. This knowledge will guide th ...
... the exact relationship cannot be assumed especially in the subwavelength regime. Since the NA of an imaging system is closely related to the resolving power of the system, it is important to characterize the relationship of the NA with diameter of the circular apertures. This knowledge will guide th ...
Ultrafast Lasers Based on Quantum Dot Structures
... (cw) or quasi-cw (i.e., pumped by current pulses longer than the characteristic times of the laser dynamics) regimes has been accompanied by reliable techniques for the generation of periodic sequences of ultrashort optical pulses. Mode locking is a technique that facilitates the generation of the s ...
... (cw) or quasi-cw (i.e., pumped by current pulses longer than the characteristic times of the laser dynamics) regimes has been accompanied by reliable techniques for the generation of periodic sequences of ultrashort optical pulses. Mode locking is a technique that facilitates the generation of the s ...
1. Introduction
... This intuitive explanation however fails to account for two-photon interference, which occurs if the two photons are indistinguishable in all degrees of freedom, i.e. the photons have the same wavelength, polarization and spatio-temporal mode. In such a case the first two possibilities - when both ...
... This intuitive explanation however fails to account for two-photon interference, which occurs if the two photons are indistinguishable in all degrees of freedom, i.e. the photons have the same wavelength, polarization and spatio-temporal mode. In such a case the first two possibilities - when both ...
Designing Fiber Optic Systems
... A key component in bi-directional fiber links is the combiner device, which combines and separates the bi-directional signals at each end, as shown in Figure 5. These devices route the source light from the lasers directly to the fiber line, without permitting it to get back into the local lasers. S ...
... A key component in bi-directional fiber links is the combiner device, which combines and separates the bi-directional signals at each end, as shown in Figure 5. These devices route the source light from the lasers directly to the fiber line, without permitting it to get back into the local lasers. S ...
Live Cells as Optical Fibers in the Vertebrate Retina
... light from human retina. When a human retina in the intact patient’s eye is studied by OCT, most of the retinal layers are easily identified because of the different amount of their backscattering of the laser. The cell process-containing layers (NFL, IPL, and HFL) display more backscattering (dark) ...
... light from human retina. When a human retina in the intact patient’s eye is studied by OCT, most of the retinal layers are easily identified because of the different amount of their backscattering of the laser. The cell process-containing layers (NFL, IPL, and HFL) display more backscattering (dark) ...
Calculation of image position, size and orientation using first order
... commonly used in telescopes and binoculars to provide an upright image orientation. No parity change. Porro system (4 R) – two Porro prisms. The first prism inverts the image and the second reverts the image. This prism accounts for the displacement between the objective lenses and the eyepieces in ...
... commonly used in telescopes and binoculars to provide an upright image orientation. No parity change. Porro system (4 R) – two Porro prisms. The first prism inverts the image and the second reverts the image. This prism accounts for the displacement between the objective lenses and the eyepieces in ...
Introduction: - TechSapphire
... but shorter than microwave radiation. Infrared radiation has wavelength between 700nm and 1mm. Infrared light is invisible to our eyes because its wavelength is below the visible spectrum. Infrared can be easily generated and doesn’t suffer electromagnetic interference, so it is nicely used in commu ...
... but shorter than microwave radiation. Infrared radiation has wavelength between 700nm and 1mm. Infrared light is invisible to our eyes because its wavelength is below the visible spectrum. Infrared can be easily generated and doesn’t suffer electromagnetic interference, so it is nicely used in commu ...
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.