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Low-coherence heterodyne photon correlation spectroscopy
... exceeds the length of the reference arm by 1.3 mm it will again experience partial coherence with the reference arm and contribute to the detected signal rather than being rejected. A short coherence length light source without or with reduced “coherent side modes” may further extend the applicabi ...
... exceeds the length of the reference arm by 1.3 mm it will again experience partial coherence with the reference arm and contribute to the detected signal rather than being rejected. A short coherence length light source without or with reduced “coherent side modes” may further extend the applicabi ...
1. Introduction - About the journal
... The most important effects of atmospheric turbulence on the laser beam are: phase-front distortion, beam broadening, beam wander and redistribution of the intensity within the beam. The temporary redistribution of the intensity, known as scintillation, results from the chaotic flow changes of air an ...
... The most important effects of atmospheric turbulence on the laser beam are: phase-front distortion, beam broadening, beam wander and redistribution of the intensity within the beam. The temporary redistribution of the intensity, known as scintillation, results from the chaotic flow changes of air an ...
Laser Frequency and Time 1 Introduction
... An optical frequency synthesizer is proposed which produces a wide comb of absolutely known reference frequencies throughout the infrared, visible, and ultraviolet range. To this end, a white light continuum with pulse repetition rate fr is produced by focusing the output of a mode-locked femtosecon ...
... An optical frequency synthesizer is proposed which produces a wide comb of absolutely known reference frequencies throughout the infrared, visible, and ultraviolet range. To this end, a white light continuum with pulse repetition rate fr is produced by focusing the output of a mode-locked femtosecon ...
Femtosecond Laser Spectroscopy
... trace can be averaged out. In that case, the peak signal is three times the background (not four times, due to the non-sinusoidal oscillation). Owing to its simpler setup, interferometric autocorrelators are more suitable than intensity autocorrelators for measuring very small (few-femtosecond) puls ...
... trace can be averaged out. In that case, the peak signal is three times the background (not four times, due to the non-sinusoidal oscillation). Owing to its simpler setup, interferometric autocorrelators are more suitable than intensity autocorrelators for measuring very small (few-femtosecond) puls ...
1.5 MB
... both on the sign of the vortex topological charge m and the sign ± in Δδ = ±90°. If the sign of m is positive then for Δδ = +90° the vortex moves up with the intensity maximum appearing below it (see Fig. 10b), while for Δδ = –90° (which is equivalent to 270°) the vortex moves down and the intensity ...
... both on the sign of the vortex topological charge m and the sign ± in Δδ = ±90°. If the sign of m is positive then for Δδ = +90° the vortex moves up with the intensity maximum appearing below it (see Fig. 10b), while for Δδ = –90° (which is equivalent to 270°) the vortex moves down and the intensity ...
Julie Cass - Stanford University
... driving the FEL. While the minimum achievable bunch length at LCLS is known to have a value below 10 fs, the precise value remains unknown. Measurement of this parameter requires a mechanism capable of probing pulses shorter than 10 fs, a scale too small to be resolved by existing time domain detect ...
... driving the FEL. While the minimum achievable bunch length at LCLS is known to have a value below 10 fs, the precise value remains unknown. Measurement of this parameter requires a mechanism capable of probing pulses shorter than 10 fs, a scale too small to be resolved by existing time domain detect ...
Experimental studies of far-field superlens for sub-diffractional optical imaging
... exciting advancement in this direction. By designing a metamaterial lens with hyperbolic dispersion, a hyperlens is able to magnify a sub-diffraction-limited object into a diffractionlimited image which allows the far-field detection. The first optical hyerlens has been experimentally demonstrated m ...
... exciting advancement in this direction. By designing a metamaterial lens with hyperbolic dispersion, a hyperlens is able to magnify a sub-diffraction-limited object into a diffractionlimited image which allows the far-field detection. The first optical hyerlens has been experimentally demonstrated m ...
Single Longitudinal Mode Blue-Violet Laser Diode for Data Storage
... reflective volume holographic gratings. The main advantages of this laser is its sub mm3 volume, thermal wavelength tuning and compatibility with the existing high volume automated manufacturing lines of Blue-violet lasers because the external cavity can be passively aligned. External cavity It is w ...
... reflective volume holographic gratings. The main advantages of this laser is its sub mm3 volume, thermal wavelength tuning and compatibility with the existing high volume automated manufacturing lines of Blue-violet lasers because the external cavity can be passively aligned. External cavity It is w ...
OPTICAL CONSTANTS OF URANIUM NITRIDE IN THE XUV
... Uranium nitride was deposited on several different substrates simultaneously so that the films created may be studied using many different characterization techniques. To date, only the silicon wafers and carbon coated TEM (Tunneling electron microscopy) grids have now been studied. The deposited f ...
... Uranium nitride was deposited on several different substrates simultaneously so that the films created may be studied using many different characterization techniques. To date, only the silicon wafers and carbon coated TEM (Tunneling electron microscopy) grids have now been studied. The deposited f ...
Advanced optics tutorials
... R-31005 HeNe laser focused to a spot using a Newport KPX043 plano-convex lens. This laser has a beam diameter of 0.63 mm and a divergence of 1.3 mrad. Note that these are beam diameter and full divergence, so in the notation of our figure, y1 = 0.315 mm and θ1 = 0.65 mrad. The KPX043 lens has a foca ...
... R-31005 HeNe laser focused to a spot using a Newport KPX043 plano-convex lens. This laser has a beam diameter of 0.63 mm and a divergence of 1.3 mrad. Note that these are beam diameter and full divergence, so in the notation of our figure, y1 = 0.315 mm and θ1 = 0.65 mrad. The KPX043 lens has a foca ...
A finite element beam propagation method for simulation of liquid
... Our goal is the development of a full-vector finite element BPM to simulate the evolution of the electric field of an input optical field upon propagation through inhomogeneous anisotropic media. In particular, we want to apply the method for optical modeling of liquid crystal devices such as liquid ...
... Our goal is the development of a full-vector finite element BPM to simulate the evolution of the electric field of an input optical field upon propagation through inhomogeneous anisotropic media. In particular, we want to apply the method for optical modeling of liquid crystal devices such as liquid ...
Absorption Measurements in Microfluidic Devices using Ring-down Spectroscopy
... picolitre sized volumes with a time response of milliseconds. Fluorescence detection is typically the method of choice due to its very high sensitivity and fast response. However, since many analytes are not naturally fluorescent, labelling protocols may have to be introduced and thereby increase th ...
... picolitre sized volumes with a time response of milliseconds. Fluorescence detection is typically the method of choice due to its very high sensitivity and fast response. However, since many analytes are not naturally fluorescent, labelling protocols may have to be introduced and thereby increase th ...
www.osa-opn.org 24 | OPN October 2008 Two positively charged
... by tunneling. Tunneling occurs over a range of phases of the fundamental pulse near each crest of the laser electric field—a time window of roughly 300 attoseconds (as). In practice, in the infrared, multiphoton ionization intensities in the range of 1014 to 1015 W/cm2 are needed, corresponding to p ...
... by tunneling. Tunneling occurs over a range of phases of the fundamental pulse near each crest of the laser electric field—a time window of roughly 300 attoseconds (as). In practice, in the infrared, multiphoton ionization intensities in the range of 1014 to 1015 W/cm2 are needed, corresponding to p ...
Plasmonic Metamaterials
... layer is small.37 Interestingly, for the high-frequency, antisymmetric SPP mode (between the surface plasmon resonance frequency and the bulk plasmon frequency), the dispersion curve exhibits negative slope, leading to negative group velocity ( v g d dk ). In contrast, the phase velocity ( v p ...
... layer is small.37 Interestingly, for the high-frequency, antisymmetric SPP mode (between the surface plasmon resonance frequency and the bulk plasmon frequency), the dispersion curve exhibits negative slope, leading to negative group velocity ( v g d dk ). In contrast, the phase velocity ( v p ...
Слайд 1 - Eventry
... method is widely used in tissue optics for processing the experimental data of spectrophotometry with integrating spheres. This method allows one to determine the absorption and the reduced scattering coefficients of a turbid media from the measured values of the total transmittance and the diffuse ...
... method is widely used in tissue optics for processing the experimental data of spectrophotometry with integrating spheres. This method allows one to determine the absorption and the reduced scattering coefficients of a turbid media from the measured values of the total transmittance and the diffuse ...
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.