Mode selective fiber Bragg gratings
... However, many high power fiber laser systems rely on large mode area (LMA) fibers. FBG inscription by conventional means is challenging here, because for large, actively doped fiber cores, the necessary prior photo sensitivity treatment comes to its limits. Additionally, fibers with larger core diameter ...
... However, many high power fiber laser systems rely on large mode area (LMA) fibers. FBG inscription by conventional means is challenging here, because for large, actively doped fiber cores, the necessary prior photo sensitivity treatment comes to its limits. Additionally, fibers with larger core diameter ...
The Faraday Effect
... glasses, and CS2, also show a large Faraday effect as predicted by the theory. In the visible range the refractive index of common substances, such as air, water; lead and soda glasses, etc., decreases rapidly with increasing wavelength (increasing frequency separation from the governing ultraviolet ...
... glasses, and CS2, also show a large Faraday effect as predicted by the theory. In the visible range the refractive index of common substances, such as air, water; lead and soda glasses, etc., decreases rapidly with increasing wavelength (increasing frequency separation from the governing ultraviolet ...
Resolution [from the New Merriam-Webster Dictionary, 1989 ed.]: 3 resolve
... All our calculations have assumed “geometrically perfect” ...
... All our calculations have assumed “geometrically perfect” ...
Extraordinary optical transmission by interference of diffracted
... polarized – 6a and with horizontally polarized light – 6b). These photographs show that formation of these fringes is independent of the state of polarization of incident beam and the intensity ratio for these fringes was also found to be the same, i.e., I/I0 ~ 3.7. These observations on polarizatio ...
... polarized – 6a and with horizontally polarized light – 6b). These photographs show that formation of these fringes is independent of the state of polarization of incident beam and the intensity ratio for these fringes was also found to be the same, i.e., I/I0 ~ 3.7. These observations on polarizatio ...
A Reliable Method For Extraction Of Material Parameters In
... and . Starting with a good estimation of and and repeating the whole procedure described in this paragraph, one will converge to the solution after a few iterations. The principle of this new extraction procedure that takes into ...
... and . Starting with a good estimation of and and repeating the whole procedure described in this paragraph, one will converge to the solution after a few iterations. The principle of this new extraction procedure that takes into ...
ABSTRACT Dissertation: STUDIES OF
... interest and much research is focused on these phenomena. More over, due to the short effective wavelength of surface Plasmon polaritons, (or surface plamsons as they are often called), nano-optical circuits integrated with electronics appear to be possible. Recently, there have been many studies o ...
... interest and much research is focused on these phenomena. More over, due to the short effective wavelength of surface Plasmon polaritons, (or surface plamsons as they are often called), nano-optical circuits integrated with electronics appear to be possible. Recently, there have been many studies o ...
Applications of Geometric Phase in Optics
... circularly polarized. The second quarter-wave plate forming an angle α/2 with the incident polarization puts the beam in a state of linear polarization. This wave plate is traversed twice by the action of the mirror, effectively acting as a half- wave plate. The second pass through the first wave pl ...
... circularly polarized. The second quarter-wave plate forming an angle α/2 with the incident polarization puts the beam in a state of linear polarization. This wave plate is traversed twice by the action of the mirror, effectively acting as a half- wave plate. The second pass through the first wave pl ...
Wave Refraction in Negative-Index Media: Always Positive
... as near-field effects. We also predict larger attenuation for the NIM case as compared to the teflon case. We cannot verify this because the data presented in Fig. 3 of Ref. [4] are without an absolute scale. Many other potentially misleading issues, such as material anisotropy, edge diffraction, et ...
... as near-field effects. We also predict larger attenuation for the NIM case as compared to the teflon case. We cannot verify this because the data presented in Fig. 3 of Ref. [4] are without an absolute scale. Many other potentially misleading issues, such as material anisotropy, edge diffraction, et ...
All-dielectric subwavelength metasurface focusing lens
... systems, displays, and detectors. In contrast to conventional curved lenses and lens arrays, dielectric meta-surface lenses can be readily wafer-level integrated and manufactured using processes compatible with CMOS technology. These lenses can be designed to improve the effective array filling fact ...
... systems, displays, and detectors. In contrast to conventional curved lenses and lens arrays, dielectric meta-surface lenses can be readily wafer-level integrated and manufactured using processes compatible with CMOS technology. These lenses can be designed to improve the effective array filling fact ...
IJFTR 12(2) 100-102
... measures the refractive index at the fibre surtace. Interferometric measurements of the refractive index across the fibre have shown that Becke-line refractive indices are not confined to the fibre surface but may occur at any point on the fibre radius 11• Clearly, any method or any formula used for ...
... measures the refractive index at the fibre surtace. Interferometric measurements of the refractive index across the fibre have shown that Becke-line refractive indices are not confined to the fibre surface but may occur at any point on the fibre radius 11• Clearly, any method or any formula used for ...
From near-field optics to optical antennas
... A near field can arise from primary sources, such as electrically driven currents, or secondary sources, such as induced polarization currents. The choice of basis in which to express the field depends on the geometry of that source. For example, the fields near a planar sample surface are convenien ...
... A near field can arise from primary sources, such as electrically driven currents, or secondary sources, such as induced polarization currents. The choice of basis in which to express the field depends on the geometry of that source. For example, the fields near a planar sample surface are convenien ...
Light Scattering
... pattern can be calculated for certain shapes of the scattering particles and then be compared with the experiment. The shape cannot be directly concluded from the scattering pattern (because the phase relation is lost during the scattering process). For molecules which are very small compared with t ...
... pattern can be calculated for certain shapes of the scattering particles and then be compared with the experiment. The shape cannot be directly concluded from the scattering pattern (because the phase relation is lost during the scattering process). For molecules which are very small compared with t ...
field in the focal region of high-numerical aperture systems
... identical to the electric field component ey; hy in a meridional plane ϕ = constant is identical to ex in the plane ϕ → ϕ + π/2; and hz in the meridional plane ϕ is identical to ez in the plane ϕ → ϕ + π/2. In view of these relations we will restrict our analysis to the electric field only. 3. Phase s ...
... identical to the electric field component ey; hy in a meridional plane ϕ = constant is identical to ex in the plane ϕ → ϕ + π/2; and hz in the meridional plane ϕ is identical to ez in the plane ϕ → ϕ + π/2. In view of these relations we will restrict our analysis to the electric field only. 3. Phase s ...
Fabry-Perot Interferometer FABRYPEROT.TEX KB 20020122
... also the interference order is increased, leading to more problems with overlapping orders. As a measure for the useful working range (no overlapping orders) the Free Spectral Range of an instrument is defined. It is calculated by equating the phase with that for ...
... also the interference order is increased, leading to more problems with overlapping orders. As a measure for the useful working range (no overlapping orders) the Free Spectral Range of an instrument is defined. It is calculated by equating the phase with that for ...
Photonic Devices II Purpose of the Lab
... get the ordinary reflection sin θ = sin φ0 which is exactly the same as for any mirror. When m = 1 we get a ray produced at a different angle. What is happening is that parts of the ray (or beam) are reflected from different lines in the grating. Interference effects prevent reflections that are not ...
... get the ordinary reflection sin θ = sin φ0 which is exactly the same as for any mirror. When m = 1 we get a ray produced at a different angle. What is happening is that parts of the ray (or beam) are reflected from different lines in the grating. Interference effects prevent reflections that are not ...
244065
... To analyze the effect of the angular spectrum on the near-field radiation from a spherical nanoparticle, a silver nanoparticle is illuminated using a focused beam of light with small and large α. The focused beam propagates in the z-direction and is polarized in the x-direction. In Fig. 1, the elect ...
... To analyze the effect of the angular spectrum on the near-field radiation from a spherical nanoparticle, a silver nanoparticle is illuminated using a focused beam of light with small and large α. The focused beam propagates in the z-direction and is polarized in the x-direction. In Fig. 1, the elect ...
Second-harmonic generation
... out and its intensity can be measured using a sensitive photodiode. Even if this inversion symmetry is broken, the resulting second-order non-linearity is extremely weak. As a rule of thumb the relative weight of the nonlinear terms is determined by the strength of the incident electro-magnetic fiel ...
... out and its intensity can be measured using a sensitive photodiode. Even if this inversion symmetry is broken, the resulting second-order non-linearity is extremely weak. As a rule of thumb the relative weight of the nonlinear terms is determined by the strength of the incident electro-magnetic fiel ...
London_S - Stanford Synchrotron Radiation Lightsource
... valence shells will be important. In addition, for certain applications such as crystal diffraction, it is important to model the motion of the ions. We suggest that the method of molecular dynamics, including electron and ion dynamics, is the best way to model the intermediate energy and timescale ...
... valence shells will be important. In addition, for certain applications such as crystal diffraction, it is important to model the motion of the ions. We suggest that the method of molecular dynamics, including electron and ion dynamics, is the best way to model the intermediate energy and timescale ...
Technology for a better society
... Point resolution: related to the finest detail that can be directly interpreted in terms of the specimen structure. Since the CTF depends very sensitively on defocus, and in general shows an oscillatory behavior as a function of k, the contribution of the different scattered beams to the amplitude m ...
... Point resolution: related to the finest detail that can be directly interpreted in terms of the specimen structure. Since the CTF depends very sensitively on defocus, and in general shows an oscillatory behavior as a function of k, the contribution of the different scattered beams to the amplitude m ...
... implementing the different types of computation. Half-adder and half-subtractor performs a very important role in this operation to achieve this demand. Several types of encoding procedures have been already proposed and demonstrated for the realization of all optical binary half-adder and half-subt ...
Two-Photon Excited Fluorescence Microscopy - Spectra
... nanometers of path length, enabling high resolution imaging with low out-of-focus background. Another advantage of TPM is the ability to image thick samples, even when they are highly heterogeneous. This is due to the use of longer wavelengths (near IR) relative to shorter ones (visible and UV) used ...
... nanometers of path length, enabling high resolution imaging with low out-of-focus background. Another advantage of TPM is the ability to image thick samples, even when they are highly heterogeneous. This is due to the use of longer wavelengths (near IR) relative to shorter ones (visible and UV) used ...
P2SF: Physically-based Point Spread Function for
... spatially- dependence. The wavelength dependent optical properties of the system components lead to repeat the entire estimation process. This is usually valid for all the methods : ray-tracing, model-based, and P2SF. Figure 2 reports the computational time (CT) required by each P2SF’s stage (SIFs, ...
... spatially- dependence. The wavelength dependent optical properties of the system components lead to repeat the entire estimation process. This is usually valid for all the methods : ray-tracing, model-based, and P2SF. Figure 2 reports the computational time (CT) required by each P2SF’s stage (SIFs, ...
Super-Resolution Microscopy: Interference and Pattern Techniques
... which is the Abbe definition for the minimum grating distance of a yet resolvable grating in the object plane (for transmitted light microscopy). In fluorescence microscopy, the wavelength of the emission light is close to that of the excitation light (λem ≈ λex ). Hence, the reciprocal grating period ...
... which is the Abbe definition for the minimum grating distance of a yet resolvable grating in the object plane (for transmitted light microscopy). In fluorescence microscopy, the wavelength of the emission light is close to that of the excitation light (λem ≈ λex ). Hence, the reciprocal grating period ...
The Optical Design of Miniaturized Microscope Objective for CARS
... to the first power of numerical aperture (NAS). Therefore, in order to decide on an appropriate NAS, we refer to the research of H. Wang and co-workers [17]. They have used the conventional microscope objective with needle-like bill, namely the MicroProbe Objective (MPO) lens from Olympus Inc. with ...
... to the first power of numerical aperture (NAS). Therefore, in order to decide on an appropriate NAS, we refer to the research of H. Wang and co-workers [17]. They have used the conventional microscope objective with needle-like bill, namely the MicroProbe Objective (MPO) lens from Olympus Inc. with ...
Phase-contrast X-ray imaging
Phase-contrast X-ray imaging (PCI) or phase-sensitive X-ray imaging is a general term for different technical methods that use information concerning changes in the phase of an X-ray beam that passes through an object in order to create its images. Standard X-ray imaging techniques like radiography or computed tomography (CT) rely on a decrease of the X-ray beam's intensity (attenuation) when traversing the sample, which can be measured directly with the assistance of an X-ray detector. In PCI however, the beam's phase shift caused by the sample is not measured directly, but is transformed into variations in intensity, which then can be recorded by the detector.In addition to producing projection images, PCI, like conventional transmission, can be combined with tomographic techniques to obtain the 3D distribution of the real part of the refractive index of the sample. When applied to samples that consist of atoms with low atomic number Z, PCI is more sensitive to density variations in the sample than conventional transmission-based X-ray imaging. This leads to images with improved soft tissue contrast.In the last several years, a variety of phase-contrast X-ray imaging techniques have been developed, all of which are based on the observation of interference patterns between diffracted and undiffracted waves. The most common techniques are crystal interferometry, propagation-based imaging, analyzer-based imaging, edge-illumination and grating-based imaging (see below).