A Guide to Acousto
... Sound waves travelling through a crystal can be modelled as crests of increased refractive index alternating with troughs of decreased refractive index. Light incident on gradients in refractive index is scattered, therefore the light scatters from the acoustic wavefronts. In an AOM the light scatte ...
... Sound waves travelling through a crystal can be modelled as crests of increased refractive index alternating with troughs of decreased refractive index. Light incident on gradients in refractive index is scattered, therefore the light scatters from the acoustic wavefronts. In an AOM the light scatte ...
full article pdf
... measuring defects of this scale is best accomplished with a calibrated microscope system. But, a microscope with sufficient magnification to properly resolve such small defects will necessarily have a relatively small field of view. This can make it difficult to image the entire length of a scratch, ...
... measuring defects of this scale is best accomplished with a calibrated microscope system. But, a microscope with sufficient magnification to properly resolve such small defects will necessarily have a relatively small field of view. This can make it difficult to image the entire length of a scratch, ...
Optimization of Bragg Grating in Optical Fiber Using - lea
... variation of the samples. Basically, a different set of samples is used to evaluate all individuals of the population to each generation and these fitness values are used to apply the selection process. This set of samples is chosen randomly to each generation. Thus, after N generations, it is possi ...
... variation of the samples. Basically, a different set of samples is used to evaluate all individuals of the population to each generation and these fitness values are used to apply the selection process. This set of samples is chosen randomly to each generation. Thus, after N generations, it is possi ...
Time Domain Simulation of Optical MIMO Channels
... many technological obstacles appear when it comes to practical implementation. This involves mode combining at the transmitter side and mode splitting at the receiver side, in particular. By using fusion or other couplers it is possible to realize a MIMO transmission system over multi-mode fibers (MM ...
... many technological obstacles appear when it comes to practical implementation. This involves mode combining at the transmitter side and mode splitting at the receiver side, in particular. By using fusion or other couplers it is possible to realize a MIMO transmission system over multi-mode fibers (MM ...
Raman spectroscopy: Watching a molecule breathe
... interaction between the vibrating atoms and their direct neighbours, the TR-SECARS signal develops a characteristic noise, rather than decaying to zero. Yampolsky et al. ...
... interaction between the vibrating atoms and their direct neighbours, the TR-SECARS signal develops a characteristic noise, rather than decaying to zero. Yampolsky et al. ...
www.osa-opn.org 24 | OPN October 2008 Two positively charged
... We have discussed how sub-cycle science was developed from studies of the highly nonlinear interaction between light and matter. In fact, it is the high nonlinearity that allows the laser cycle to be sub-divided. Re-collision is one form of highly nonlinear interaction. With re-collision and using a ...
... We have discussed how sub-cycle science was developed from studies of the highly nonlinear interaction between light and matter. In fact, it is the high nonlinearity that allows the laser cycle to be sub-divided. Re-collision is one form of highly nonlinear interaction. With re-collision and using a ...
Originally published as “Ultrafast spin polarization in a multiferroic
... As shown in Fig. 2 (a), the differential transient polarization ellipticity ΔηK = 1/2(ΔηKσ+ - ΔηKσ-) (red squares) between the σ+ and σ- pump beam allows us to minimize the thermal effect as the primary source of the net dichroism excited by the pump beam. In the following, we attribute this to the ...
... As shown in Fig. 2 (a), the differential transient polarization ellipticity ΔηK = 1/2(ΔηKσ+ - ΔηKσ-) (red squares) between the σ+ and σ- pump beam allows us to minimize the thermal effect as the primary source of the net dichroism excited by the pump beam. In the following, we attribute this to the ...
Optical Detection of Early Damage in Retinal Ganglion Cells in a
... stages, even in ‘‘histologically normal’’ precancerous lesions.9,10 The measured spectroscopic biomarkers were found to be associated with some ubiquitous structural hallmarks in cancers such as enlarged nuclear sizes, chromatin compaction, and extracellular matrix crosslinking.11,12 Using backscatt ...
... stages, even in ‘‘histologically normal’’ precancerous lesions.9,10 The measured spectroscopic biomarkers were found to be associated with some ubiquitous structural hallmarks in cancers such as enlarged nuclear sizes, chromatin compaction, and extracellular matrix crosslinking.11,12 Using backscatt ...
Advances in diamond-turned surfaces enable unique cost
... These processes include novel grating fabrication methods and diamond machining alignment datum into the substrate of the optical surface. These fabrication techniques allow “snap-together” systems that maintain precision alignment of the optical system without requiring tedious adjustments. The mat ...
... These processes include novel grating fabrication methods and diamond machining alignment datum into the substrate of the optical surface. These fabrication techniques allow “snap-together” systems that maintain precision alignment of the optical system without requiring tedious adjustments. The mat ...
Laser Cutting
... amplification were finally worked out. It would be the 1960s before the first laser oscillatiors were actually constructed. These devices could emit an intense beam of light made up of photons which were all exact copies of each other. This meant that together they formed a single electro-magnetic w ...
... amplification were finally worked out. It would be the 1960s before the first laser oscillatiors were actually constructed. These devices could emit an intense beam of light made up of photons which were all exact copies of each other. This meant that together they formed a single electro-magnetic w ...
Three-Dimensional Mapping of Near-Field Interactions via Single-Photon Tomography Benjamin D. Mangum,
... fluorescence signals are collected through the same objective and detected by an APD (Perkin-Elmer). The laser focus is aligned onto an AFM probe; when the excitation polarization is longitudinal, an enhancement in the optical intensity is expected at the tip apex due to a nonresonant lightning-rod ...
... fluorescence signals are collected through the same objective and detected by an APD (Perkin-Elmer). The laser focus is aligned onto an AFM probe; when the excitation polarization is longitudinal, an enhancement in the optical intensity is expected at the tip apex due to a nonresonant lightning-rod ...
NONLINEAR OPTICAL PROPERTIES OF NATURAL
... work, and that it has not been submitted anywhere for any award. Where ...
... work, and that it has not been submitted anywhere for any award. Where ...
The Response of Polarization Maintaining Fibers upon Temperature
... radiation with no disturbance of external thermal field, the phase shift φ will be equal to zero and the corresponding Stokes component S2 = 0. For optical fiber length different from a multiple of its beat length and without effect of the external thermal field disturbance the phase shift will be n ...
... radiation with no disturbance of external thermal field, the phase shift φ will be equal to zero and the corresponding Stokes component S2 = 0. For optical fiber length different from a multiple of its beat length and without effect of the external thermal field disturbance the phase shift will be n ...
Planar Integrated Optical Waveguide Spectroscopy
... general term for structures that transport electromagnetic radiation via repeated TIR. Although waveguides can be created in numerous geometries, this article focuses on waveguides with a planar geometry that are used to study thin films and interfaces. The fundamental work of Harrick and Fahrenfort ...
... general term for structures that transport electromagnetic radiation via repeated TIR. Although waveguides can be created in numerous geometries, this article focuses on waveguides with a planar geometry that are used to study thin films and interfaces. The fundamental work of Harrick and Fahrenfort ...
Evaluation and application of spatial light modulators for
... Recently, TI introduced the Discovery 1000 general purpose board to support new business areas in addition to the mainstream application of DMD technology in digital projection. Based on this Discovery 1000 platform the German company ViALUX [6] developed the ALP parallel interface controller for hi ...
... Recently, TI introduced the Discovery 1000 general purpose board to support new business areas in addition to the mainstream application of DMD technology in digital projection. Based on this Discovery 1000 platform the German company ViALUX [6] developed the ALP parallel interface controller for hi ...
Super-Resolution Fluorescence Microscopy by Structured Light
... optical sectioning capability. In this ...
... optical sectioning capability. In this ...
EQUILIBRIUM MODE DISTRIBUTION IN W
... the group delay difference between modes be minimized by optimizing the fiber’s refractive index profile [11]. As modal attenuation, coupling and dispersion affect the transmission of the W-type optical fiber, methods for calculating their contributions are needed. The far-field pattern of an optica ...
... the group delay difference between modes be minimized by optimizing the fiber’s refractive index profile [11]. As modal attenuation, coupling and dispersion affect the transmission of the W-type optical fiber, methods for calculating their contributions are needed. The far-field pattern of an optica ...
Full width at half maximum (FWHM) analysis of solitonic pulse
... geometries for useful functions in areas such as optical communication [3, 4], signal processing in the nanoscale regime [5]. Its nonlinear phase response can also be readily incorporated into an interferometer system to produce a specific intensity output function [6, 7]. One interesting result eme ...
... geometries for useful functions in areas such as optical communication [3, 4], signal processing in the nanoscale regime [5]. Its nonlinear phase response can also be readily incorporated into an interferometer system to produce a specific intensity output function [6, 7]. One interesting result eme ...
Two-dimensional array of diffractive microlenses
... The diffraction efficiency was measured to be 91% which is close to the theoretical value for an eight-level lens. The measurement was made by illuminating the lenslets with a plane wave and measuring the intensity in the focal plane. Two measurements were taken: first, the constant intensity I was ...
... The diffraction efficiency was measured to be 91% which is close to the theoretical value for an eight-level lens. The measurement was made by illuminating the lenslets with a plane wave and measuring the intensity in the focal plane. Two measurements were taken: first, the constant intensity I was ...
gaussian beam optics
... or shape the laser beam by using lenses and other optical elements. In general, laser-beam propagation can be approximated by assuming that the laser beam has an ideal Gaussian intensity profile, which corresponds to the theoretical TEM00 mode. Coherent Gaussian beams have peculiar transformation pr ...
... or shape the laser beam by using lenses and other optical elements. In general, laser-beam propagation can be approximated by assuming that the laser beam has an ideal Gaussian intensity profile, which corresponds to the theoretical TEM00 mode. Coherent Gaussian beams have peculiar transformation pr ...
Optical tweezers
Optical tweezers (originally called ""single-beam gradient force trap"") are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch to physically hold and move microscopic dielectric objects similar to tweezers. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.