Full-text PDF - Research School of Physics and Engineering
... as a result of the mutual self-focusing due to the phase-matched three-wave mixing in quadratic (or χ (2) ) nonlinear crystals [9]. In all these cases, propagation of self-guided waves is observed in non-Kerr materials which are described by the models more general than the cubic NLS equation. Becau ...
... as a result of the mutual self-focusing due to the phase-matched three-wave mixing in quadratic (or χ (2) ) nonlinear crystals [9]. In all these cases, propagation of self-guided waves is observed in non-Kerr materials which are described by the models more general than the cubic NLS equation. Becau ...
Module P6.3 Optical elements: prisms, lenses and spherical mirrors
... You will probably be familiar with the action of a prism in splitting white light into the colours of the rainbow, or of a simple magnifying lens, or of the curved reflectors used in vanity mirrors, shaving mirrors and driving mirrors. This module describes these optical elements and introduces you ...
... You will probably be familiar with the action of a prism in splitting white light into the colours of the rainbow, or of a simple magnifying lens, or of the curved reflectors used in vanity mirrors, shaving mirrors and driving mirrors. This module describes these optical elements and introduces you ...
Thermal and electrical properties of - Ruhr
... much more attention to the photothermal effect was attributed and a lot of new experimental techniques based on the effect were developed. ...
... much more attention to the photothermal effect was attributed and a lot of new experimental techniques based on the effect were developed. ...
UNIVERSITAT ROVIRA I VIRGILI
... in some cases. If a film is thin enough that it shows a colored interference pattern then it will probably be a good ellipsometric sample. The sensitivity of an ellipsometer is such that a change is film thickness of a few Angstroms is usually easy to detect. The use of spectroscopic ellipsometry ha ...
... in some cases. If a film is thin enough that it shows a colored interference pattern then it will probably be a good ellipsometric sample. The sensitivity of an ellipsometer is such that a change is film thickness of a few Angstroms is usually easy to detect. The use of spectroscopic ellipsometry ha ...
Vertical-Cavity Surface-Emitting Lasers: Advanced
... An important contribution of this thesis is the novel concept of chirpassisted coherent detection for direct current modulated VCSELs. A coherent receiver approach that exploits adiabatic frequency chirping of direct modulated VCSELs to improve the extinction ratio of received signals is introduced. ...
... An important contribution of this thesis is the novel concept of chirpassisted coherent detection for direct current modulated VCSELs. A coherent receiver approach that exploits adiabatic frequency chirping of direct modulated VCSELs to improve the extinction ratio of received signals is introduced. ...
The Strontium Optical Lattice Clock
... greatly from my involvement in the Optical Science and Engineering program, which gave me the opportunity to see up-close different research settings (academia, national lab, and industry) and to get to know and work with talented scientists like Jun Ye, Chris Oates, Leo Hollberg, Charles Garvin, Ch ...
... greatly from my involvement in the Optical Science and Engineering program, which gave me the opportunity to see up-close different research settings (academia, national lab, and industry) and to get to know and work with talented scientists like Jun Ye, Chris Oates, Leo Hollberg, Charles Garvin, Ch ...
The Strontium Optical Lattice Clock
... greatly from my involvement in the Optical Science and Engineering program, which gave me the opportunity to see up-close different research settings (academia, national lab, and industry) and to get to know and work with talented scientists like Jun Ye, Chris Oates, Leo Hollberg, Charles Garvin, Ch ...
... greatly from my involvement in the Optical Science and Engineering program, which gave me the opportunity to see up-close different research settings (academia, national lab, and industry) and to get to know and work with talented scientists like Jun Ye, Chris Oates, Leo Hollberg, Charles Garvin, Ch ...
High-Q Microresonators as Lasing Elements for Silicon Photonics
... I am forever indebted to Kartik Srinivasan for his tremendous help over the years. Kartik is undoubtedly one of the smartest people I have every met, and his genius is only outdone by his modesty. A person doesn’t have to know Kartik for very long before they realize that Kartik’s “I’m not sure” is ...
... I am forever indebted to Kartik Srinivasan for his tremendous help over the years. Kartik is undoubtedly one of the smartest people I have every met, and his genius is only outdone by his modesty. A person doesn’t have to know Kartik for very long before they realize that Kartik’s “I’m not sure” is ...
Composite optical vortices - RIT Center for Imaging Science
... Optical vortices1 (OVs) or ‘‘phase defects’’ often occur in coherent radiation, e.g., in Laguerre–Gaussian laser beams,2 light scattered from rough surfaces,3,4 optical caustics,5,6 and OV solitons.7,8 The center of the vortex is characterized by a dark core, within which the intensity vanishes at a ...
... Optical vortices1 (OVs) or ‘‘phase defects’’ often occur in coherent radiation, e.g., in Laguerre–Gaussian laser beams,2 light scattered from rough surfaces,3,4 optical caustics,5,6 and OV solitons.7,8 The center of the vortex is characterized by a dark core, within which the intensity vanishes at a ...
Open the publication - UEF Electronic Publications
... Optical properties of structured media are controlled by the local electric and magnetic fields to a great extent. Nanostructuring allows one to customize the macroscopic linear and nonlinear optical properties of these artificial media by engineering the local fields precisely. In this thesis, loca ...
... Optical properties of structured media are controlled by the local electric and magnetic fields to a great extent. Nanostructuring allows one to customize the macroscopic linear and nonlinear optical properties of these artificial media by engineering the local fields precisely. In this thesis, loca ...
[pdf]
... devices.7 In this paper we have explored the nonlinear optical properties of GaN and its interfaces. Several secondharmonic generation ~SHG! measurements of GaN ~Refs. 8–12! have been reported. These works measured the nonlinear susceptibility elements of GaN at a single fundamental wavelength of 10 ...
... devices.7 In this paper we have explored the nonlinear optical properties of GaN and its interfaces. Several secondharmonic generation ~SHG! measurements of GaN ~Refs. 8–12! have been reported. These works measured the nonlinear susceptibility elements of GaN at a single fundamental wavelength of 10 ...
Invited Paper
... The transmission of data using an on-chip OI requires an electro-optical modulator and an electrical driver circuit. The laser source provides light to the modulator, which transduces electrical data supplied from the electrical driver into a modulated optical signal. Several high-speed electro-opti ...
... The transmission of data using an on-chip OI requires an electro-optical modulator and an electrical driver circuit. The laser source provides light to the modulator, which transduces electrical data supplied from the electrical driver into a modulated optical signal. Several high-speed electro-opti ...
Principles and techniques of digital holographic microscopy
... many interesting properties and applications, such as the ability to arbitrarily prescribe desired amplitude and phase properties of the output optical field starting from fictitious objects. CGH is not a subject of this review [16]. By direct electronic recording of holographic interference, and be ...
... many interesting properties and applications, such as the ability to arbitrarily prescribe desired amplitude and phase properties of the output optical field starting from fictitious objects. CGH is not a subject of this review [16]. By direct electronic recording of holographic interference, and be ...
acute posterior multifocal placoid pigment epitheliopathy following
... conditions and to lead towards appropriate therapy management. Moreover, Darugar et al. published a case of sarcoidosis with APMPPE as initial manifestation [17]. There is documented information in literature that APMPPE can be triggered by vaccination against B hepatitis ...
... conditions and to lead towards appropriate therapy management. Moreover, Darugar et al. published a case of sarcoidosis with APMPPE as initial manifestation [17]. There is documented information in literature that APMPPE can be triggered by vaccination against B hepatitis ...
Optical fiber cables[edit]
... illustration comes from a later article by Colladon, in 1884. Fiber optics, though used extensively in the modern world, is a fairly simple, and relatively old, technology. Guiding of light by refraction, the principle that makes fiber optics possible, was first demonstrated by Daniel Colladon and J ...
... illustration comes from a later article by Colladon, in 1884. Fiber optics, though used extensively in the modern world, is a fairly simple, and relatively old, technology. Guiding of light by refraction, the principle that makes fiber optics possible, was first demonstrated by Daniel Colladon and J ...
Optical Comms 2004 (Summer)
... Scattering Loss: Scattering is a process whereby all or some of the optical power in a mode is transferred into another mode. This frequently causes attenuation, since the transfer is often to a mode which does not propagate well. (also called a leaky or radiation mode). One of the most common forms ...
... Scattering Loss: Scattering is a process whereby all or some of the optical power in a mode is transferred into another mode. This frequently causes attenuation, since the transfer is often to a mode which does not propagate well. (also called a leaky or radiation mode). One of the most common forms ...
AOK2-UP01 - February 2, 2015
... Figure 2. A photograph of an AOK1-UM01 Adaptive Optics kit. Please note that the breadboard is not included with the purchase of an AO kit. The key components, which will be discussed in the text below, are numbered. ...
... Figure 2. A photograph of an AOK1-UM01 Adaptive Optics kit. Please note that the breadboard is not included with the purchase of an AO kit. The key components, which will be discussed in the text below, are numbered. ...
Femtosecond Frequency Combs for Optical Clocks and Timing
... standard with a transfer instability of 6 × 10−18 at 1 s, more than two orders of magnitude lower than reported for any fiber link of similar length. Phase coherence between ends of the fiber link is preserved at the mHz linewidth level, and the transfer phase noise corresponds to less than 80 attos ...
... standard with a transfer instability of 6 × 10−18 at 1 s, more than two orders of magnitude lower than reported for any fiber link of similar length. Phase coherence between ends of the fiber link is preserved at the mHz linewidth level, and the transfer phase noise corresponds to less than 80 attos ...
Monte Carlo Simulation of Light Scattering on a Sound Wave
... confocal imaging. While effective, these spatial techniques may have difficulty rejecting light that has been multiply scattered back into the ballistic direction. The time domain technique requires expensive short–pulse laser and fast light detectors [4]. It has been shown that ballistic imaging is ...
... confocal imaging. While effective, these spatial techniques may have difficulty rejecting light that has been multiply scattered back into the ballistic direction. The time domain technique requires expensive short–pulse laser and fast light detectors [4]. It has been shown that ballistic imaging is ...
Measuring the spatiotemporal electric field of
... To measure Eunk共兲 using SEA TADPOLE, we couple the reference and unknown pulses into two identical fibers. The output ends of the fibers are placed close together, so that when the light diverges from them, both beams are collimated with the same spherical lens (focal length f). Because the fibers ...
... To measure Eunk共兲 using SEA TADPOLE, we couple the reference and unknown pulses into two identical fibers. The output ends of the fibers are placed close together, so that when the light diverges from them, both beams are collimated with the same spherical lens (focal length f). Because the fibers ...
436 KB - The Photonic Systems Group
... modulation speeds of 40 Gb/s and above [13], where the nonlinear interactions among different wavelength channels become less-limiting factors. As a result of the short pulse width and high data rate, optical pulses within one channel are quickly dispersed and overlap significantly so to interact th ...
... modulation speeds of 40 Gb/s and above [13], where the nonlinear interactions among different wavelength channels become less-limiting factors. As a result of the short pulse width and high data rate, optical pulses within one channel are quickly dispersed and overlap significantly so to interact th ...
IMI National Guidelines Ophthalmic Imaging
... the exact pathology has been defined. Image Magnification In most cases high image magnifications must be sacrificed to achieve a greater "Depth of Field"; typical depth of field values range from 0.2 to 0.8 mm at 1.6x magnification at the imaging plane. Many workers have found this figure a workabl ...
... the exact pathology has been defined. Image Magnification In most cases high image magnifications must be sacrificed to achieve a greater "Depth of Field"; typical depth of field values range from 0.2 to 0.8 mm at 1.6x magnification at the imaging plane. Many workers have found this figure a workabl ...
Complications after LASIK or PRK: achieving excellent outcomes in
... surface, which is why neither topography‐guided nor wavefront‐guided ablations will be sufficient to correct such complications. In this case, the epithelium has compensated as much as it can for the stromal surface asymmetry, but irregularity exists. Thus, the patient presents with asymmetric ...
... surface, which is why neither topography‐guided nor wavefront‐guided ablations will be sufficient to correct such complications. In this case, the epithelium has compensated as much as it can for the stromal surface asymmetry, but irregularity exists. Thus, the patient presents with asymmetric ...
Design, fabrication and testing of microlens arrays for sensors and
... the stylus measurement. A stylus profilometer measures a height difference very precisely, but is only of very limited use in characterizing a continuous lens profile. Figure 6(b) and (c) show the surface in the centre of a fused silica microlens (Ø = 145 µm, hL = 11 µm) as measured by an atomic for ...
... the stylus measurement. A stylus profilometer measures a height difference very precisely, but is only of very limited use in characterizing a continuous lens profile. Figure 6(b) and (c) show the surface in the centre of a fused silica microlens (Ø = 145 µm, hL = 11 µm) as measured by an atomic for ...
Diagnosis and Management of Post-Refractive Surgery Complex Eyes
... Using average epithelial thickness profiles and limits of epithelial thickness of normal and keratoconic corneas, epithelial thickness profiles can be used to confirm or exclude a diagnosis of keratoconus in eyes suggestive but not conclusive about a diagnosis of keratoconus on topography. Thinning ...
... Using average epithelial thickness profiles and limits of epithelial thickness of normal and keratoconic corneas, epithelial thickness profiles can be used to confirm or exclude a diagnosis of keratoconus in eyes suggestive but not conclusive about a diagnosis of keratoconus on topography. Thinning ...
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.