claudia patricia valdés escobar
... such as stroke, ischemic injuries, traumatic brain injury, as well as neurodegenerative diseases such as the Alzheimer’s [2, 3]. A stroke, is the rapid loss of cerebral functions (brain damage) due to a critical change in the CBF, i. e., blood supply in time, and it is classified into two types name ...
... such as stroke, ischemic injuries, traumatic brain injury, as well as neurodegenerative diseases such as the Alzheimer’s [2, 3]. A stroke, is the rapid loss of cerebral functions (brain damage) due to a critical change in the CBF, i. e., blood supply in time, and it is classified into two types name ...
`Singular Optics`, International Journal of Optics, Vol.2012
... gap vortex solitons under the normal four-site excitation with a self-defocusing nonlinearity, while the DCVs can be stable only under an eight-site excitation inside the photonic lattices. Moreover, the SCVs can also turn into stable surface vortex solitons under the four-site excitation at the sur ...
... gap vortex solitons under the normal four-site excitation with a self-defocusing nonlinearity, while the DCVs can be stable only under an eight-site excitation inside the photonic lattices. Moreover, the SCVs can also turn into stable surface vortex solitons under the four-site excitation at the sur ...
Resolution enhancement techniques in microscopy
... explore the foundations of resolution as expounded by the astronomers and the physicists and describe the conditions for which they apply. Then we elucidate Ernst Abbe’s theory of optical formation in the microscope, and its experimental verification and dissemination to the world wide microscope com ...
... explore the foundations of resolution as expounded by the astronomers and the physicists and describe the conditions for which they apply. Then we elucidate Ernst Abbe’s theory of optical formation in the microscope, and its experimental verification and dissemination to the world wide microscope com ...
Rodrigo Aviles‐Espinosa STRATEGIES FOR PUSHING NONLINEAR MICROSCOPY TOWARDS ITS PERFORMANCE LIMITS
... emission wavelength enables to demonstrate how matching the employed fluorescent marker two-photon action cross-section is crucial for efficient TPEF signal production at very low powers. This enables relaxing the peak power conditions (40 W) to excite the sample. The enhanced versatility of this st ...
... emission wavelength enables to demonstrate how matching the employed fluorescent marker two-photon action cross-section is crucial for efficient TPEF signal production at very low powers. This enables relaxing the peak power conditions (40 W) to excite the sample. The enhanced versatility of this st ...
universitas indonesia characterization and design of gallium nitride
... Realisation of ohmic contact by RF sputtering .................................. An Ohmic Contact of GaN/Si ............................................................. (a) Application of voltage into GaN film and direction of electric field, (b) photo of sample position in the prism coupling ..... ...
... Realisation of ohmic contact by RF sputtering .................................. An Ohmic Contact of GaN/Si ............................................................. (a) Application of voltage into GaN film and direction of electric field, (b) photo of sample position in the prism coupling ..... ...
Biomedical Optical Imaging
... Figure 1.4 shows a schematic of a typical high speed, ultrahigh resolution spectral / Fourier domain OCT system. The light source can be either a femtosecond laser or a broadband superluminescent diode (SLD). Our earlier studies used a femtosecond Ti:Sapphire laser for ultrahigh-resolution imaging, ...
... Figure 1.4 shows a schematic of a typical high speed, ultrahigh resolution spectral / Fourier domain OCT system. The light source can be either a femtosecond laser or a broadband superluminescent diode (SLD). Our earlier studies used a femtosecond Ti:Sapphire laser for ultrahigh-resolution imaging, ...
Fluorescence of coumarins and xanthenes after two
... in the near UV with near-infrared light. It has therefore been proposed that the enhanced resolution that is available through UV light can be achieved without the need for special UV optics.9 This has been proven for confocal fluorescence microscopy, showing that two-photon absorption leads to a co ...
... in the near UV with near-infrared light. It has therefore been proposed that the enhanced resolution that is available through UV light can be achieved without the need for special UV optics.9 This has been proven for confocal fluorescence microscopy, showing that two-photon absorption leads to a co ...
Evaluation of Optical Formation Measurements on Printing
... way is to measure the optical formation, which is based on a transmission of light. This method is faster and less expensive than β-radiation, but unfortunately, it can give misleading results. The light transmission in optical formation is affected by fillers, which have other optical properties th ...
... way is to measure the optical formation, which is based on a transmission of light. This method is faster and less expensive than β-radiation, but unfortunately, it can give misleading results. The light transmission in optical formation is affected by fillers, which have other optical properties th ...
Ultrasensitive absorption spectroscopy with a high
... comparable to the intrinsic cavity loss, the gain rolls off as the absorption begins to limit the effective number of passes rather than the losses at the mirrors. The above analysis shows that the cavity provides tremendous signal gains even if the cavity resonances are completely suppressed. In fa ...
... comparable to the intrinsic cavity loss, the gain rolls off as the absorption begins to limit the effective number of passes rather than the losses at the mirrors. The above analysis shows that the cavity provides tremendous signal gains even if the cavity resonances are completely suppressed. In fa ...
2004 “The Physics of attosecond light pulses”
... The SRS and the HHG methods described in the next sections have in common that in both, the frequency comb (the ‘sidebands’) is engineered by the nonlinear interaction between an intense laser pulse and a vapour6 . The comb period is ten times smaller for SRS (typically 100 THz) than for HHG (1000 T ...
... The SRS and the HHG methods described in the next sections have in common that in both, the frequency comb (the ‘sidebands’) is engineered by the nonlinear interaction between an intense laser pulse and a vapour6 . The comb period is ten times smaller for SRS (typically 100 THz) than for HHG (1000 T ...
Adaptive-Optics Compensation through a High-Gain Raman Amplifier of
... The results described in this article support the feasibility of the Raman look-through technique. The initial experiment, conducted at Lincoln Laboratory. joined the Atmospheric Compensation Experiment (ACE) adaptive-optics system with a Raman amplifier pumped by a laboratory excimer laser [31. The ...
... The results described in this article support the feasibility of the Raman look-through technique. The initial experiment, conducted at Lincoln Laboratory. joined the Atmospheric Compensation Experiment (ACE) adaptive-optics system with a Raman amplifier pumped by a laboratory excimer laser [31. The ...
DESIGN, FABRICATION AND CHARACTERIZATION OF GUIDED
... filters have less explored experimentally, as there is material limitation to design this kind of filters with simple architecture and they also may require coupling to multiple resonances simultaneously. Apart from the design issues, experimental realization of these filters is challenging. There h ...
... filters have less explored experimentally, as there is material limitation to design this kind of filters with simple architecture and they also may require coupling to multiple resonances simultaneously. Apart from the design issues, experimental realization of these filters is challenging. There h ...
Mode-Matching Analysis of Whispering-Gallery
... mimic of the whispering gallery, named as whispering gallery mode (WGM) microcavity, has emerged as a powerful photonic device since last centaury [2, 3, 4, 5]. In an optical WGM microcavity, photons circulate along the cavity edge. When the round trip time the photon travels coincides with an integ ...
... mimic of the whispering gallery, named as whispering gallery mode (WGM) microcavity, has emerged as a powerful photonic device since last centaury [2, 3, 4, 5]. In an optical WGM microcavity, photons circulate along the cavity edge. When the round trip time the photon travels coincides with an integ ...
Infrared fibers
... The second family in Fig. 1 [Figs. 1(d)–1(f)] comprises recently developed hybrid IR fibers where materials from heterogeneous families of materials are combined: chalcogenide glasses with a polymer [Fig. 1(d)], chalcogenide and silica glasses [Fig. 1(e)], and chalcogenide and tellurite glasses [Fi ...
... The second family in Fig. 1 [Figs. 1(d)–1(f)] comprises recently developed hybrid IR fibers where materials from heterogeneous families of materials are combined: chalcogenide glasses with a polymer [Fig. 1(d)], chalcogenide and silica glasses [Fig. 1(e)], and chalcogenide and tellurite glasses [Fi ...
Influence of heterogeneous refractivity on optical wave
... on the impact of heterogeneous refractivity induced by coastal LLJs on long-range optical wave propagations. Quantification of the impact of realistic heterogeneous refraction, induced by mesoscale and synoptic scale phenomena, on optical wave propagation is a largely unexplored area of research. Th ...
... on the impact of heterogeneous refractivity induced by coastal LLJs on long-range optical wave propagations. Quantification of the impact of realistic heterogeneous refraction, induced by mesoscale and synoptic scale phenomena, on optical wave propagation is a largely unexplored area of research. Th ...
LD Didactic (LEYBOLD) Scientific Teaching Manual
... The relation E32 / E42 is also known as the quantum efficiency. It gives the energy ratio of a laser photon to the pump photon. For the Nd:YAG laser pumped by a diode laser this is, for example, 810 nm / 1064 nm = 0,76. The value η is the quantum yield, but unfortunately some1.2.5 Steady-state solut ...
... The relation E32 / E42 is also known as the quantum efficiency. It gives the energy ratio of a laser photon to the pump photon. For the Nd:YAG laser pumped by a diode laser this is, for example, 810 nm / 1064 nm = 0,76. The value η is the quantum yield, but unfortunately some1.2.5 Steady-state solut ...
Silicon photonics
Silicon photonics is the study and application of photonic systems which use silicon as an optical medium. The silicon is usually patterned with sub-micrometre precision, into microphotonic components. These operate in the infrared, most commonly at the 1.55 micrometre wavelength used by most fiber optic telecommunication systems. The silicon typically lies on top of a layer of silica in what (by analogy with a similar construction in microelectronics) is known as silicon on insulator (SOI).Silicon photonic devices can be made using existing semiconductor fabrication techniques, and because silicon is already used as the substrate for most integrated circuits, it is possible to create hybrid devices in which the optical and electronic components are integrated onto a single microchip. Consequently, silicon photonics is being actively researched by many electronics manufacturers including IBM and Intel, as well as by academic research groups such as that of Prof. Michal Lipson, who see it is a means for keeping on track with Moore's Law, by using optical interconnects to provide faster data transfer both between and within microchips.The propagation of light through silicon devices is governed by a range of nonlinear optical phenomena including the Kerr effect, the Raman effect, two photon absorption and interactions between photons and free charge carriers. The presence of nonlinearity is of fundamental importance, as it enables light to interact with light, thus permitting applications such as wavelength conversion and all-optical signal routing, in addition to the passive transmission of light.Silicon waveguides are also of great academic interest, due to their ability to support exotic nonlinear optical phenomena such as soliton propagation.