DU4301727731
... (i.e.,saturation) or reverse saturation in the absorption aspect, whereas self-focusing or self-defocusing occurs in the refraction aspect. Of the various techniques available, Z-scan method [6, 7] is a simple and effective tool for determining nonlinear properties and is used widely in material cha ...
... (i.e.,saturation) or reverse saturation in the absorption aspect, whereas self-focusing or self-defocusing occurs in the refraction aspect. Of the various techniques available, Z-scan method [6, 7] is a simple and effective tool for determining nonlinear properties and is used widely in material cha ...
SRON presentation
... Low-loss combination of two beams of different frequency and polarization into one beam of the same polarization Often used for LO and signal beam coupling Use of polarization rotation by roof top mirror: • Input beam reflected by grid ...
... Low-loss combination of two beams of different frequency and polarization into one beam of the same polarization Often used for LO and signal beam coupling Use of polarization rotation by roof top mirror: • Input beam reflected by grid ...
Measuring amplitude and phase in optical fields with
... brought close to the surface. “Close” or “near” means smaller than a wavelength (in contrast to “far”) because this is the distance where evanescent waves extend. The definition of near-field optics (NFO) can be the following [1]: “near-field optics is a branch of optics that considers configuration ...
... brought close to the surface. “Close” or “near” means smaller than a wavelength (in contrast to “far”) because this is the distance where evanescent waves extend. The definition of near-field optics (NFO) can be the following [1]: “near-field optics is a branch of optics that considers configuration ...
Optical Metrology - Bogazici University Physics Department
... It is a measurement method based on the wave nature of light, which uses optical interference fringes of the laser beam ...
... It is a measurement method based on the wave nature of light, which uses optical interference fringes of the laser beam ...
Determination of the dihedral angle errors of a corner cube from its
... (3) When a perfect cube is tested in this fashion, the prism aperture is covered by a single sinusoidal fringe pattern. Imperfect prisms with planar reflecting surf sinusoidal fringe patterns over their apertures. The patterns are usually inclined at various angles with respect to one another, and e ...
... (3) When a perfect cube is tested in this fashion, the prism aperture is covered by a single sinusoidal fringe pattern. Imperfect prisms with planar reflecting surf sinusoidal fringe patterns over their apertures. The patterns are usually inclined at various angles with respect to one another, and e ...
Final Exam Review Slides
... closed for a long time. Someone then comes along and opens the switch. ...
... closed for a long time. Someone then comes along and opens the switch. ...
DESIGN AND CONSTRUCTION OF AN INTERFEROMETER SYSTEM FOR THE STUDY OF
... surfaces. The films were then investigated through XRD using a Phillips Materials Research diffractometer. In general the silver thin films showed the (111) preferred orientation; the scientists attributed the (111) planes to having the lowest surface energy. The silver films on smooth SiO2 substrat ...
... surfaces. The films were then investigated through XRD using a Phillips Materials Research diffractometer. In general the silver thin films showed the (111) preferred orientation; the scientists attributed the (111) planes to having the lowest surface energy. The silver films on smooth SiO2 substrat ...
High resolution transmission electron microscopy
... Why electrons? The interaction of waves with an obstacle: The boat rides the long wavelength ocean wave, but reflects the small wavelength surface ripple. An observer who wishes to detect the presence of the boat can do so only by observing waves which have wavelengths smaller than, or comparable t ...
... Why electrons? The interaction of waves with an obstacle: The boat rides the long wavelength ocean wave, but reflects the small wavelength surface ripple. An observer who wishes to detect the presence of the boat can do so only by observing waves which have wavelengths smaller than, or comparable t ...
FINCH: Fresnel Incoherent Correlation Hologram
... and in general creating holograms requires a coherent interferometer system. In this chapter we describe our recently invented method of acquiring incoherent digital holograms. The term incoherent digital hologram means that incoherent light beams reflected or emitted from real existing objects inte ...
... and in general creating holograms requires a coherent interferometer system. In this chapter we describe our recently invented method of acquiring incoherent digital holograms. The term incoherent digital hologram means that incoherent light beams reflected or emitted from real existing objects inte ...
Chapter 2 Introduction to polarization of light - diss.fu
... where φ denotes the retardation or the phase shift difference between the fast and the slow axis in the crystal (difference retardance), which is controlled by an external voltage. Having these Jones matrices we are able to show the interaction of light with crystals for a single pixel in the modula ...
... where φ denotes the retardation or the phase shift difference between the fast and the slow axis in the crystal (difference retardance), which is controlled by an external voltage. Having these Jones matrices we are able to show the interaction of light with crystals for a single pixel in the modula ...
1 L5: Diffraction L5 DIFFRACTION Objectives Aims From this
... about 1679 and was modified much later into the form we now use by Augustin Fresnel (1788 1827). Huygens' construction is a method for locating the new position of a wave front. Starting from a known wavefront, we imagine each point on the wavefront to be a new source of secondary wavelets. The wave ...
... about 1679 and was modified much later into the form we now use by Augustin Fresnel (1788 1827). Huygens' construction is a method for locating the new position of a wave front. Starting from a known wavefront, we imagine each point on the wavefront to be a new source of secondary wavelets. The wave ...
Prospects for Precise Measurements with Echo Atom
... associated with a change in the internal atomic state. Hence, all the information regarding the interference between atoms is stored in the relative population between states | F = 1i and | F = 2i. Despite the well-developed nature of Raman AIs, a number of alternate interferometer configurations ha ...
... associated with a change in the internal atomic state. Hence, all the information regarding the interference between atoms is stored in the relative population between states | F = 1i and | F = 2i. Despite the well-developed nature of Raman AIs, a number of alternate interferometer configurations ha ...
Beam Diagnostics 2 - ab-abp-frankz
... Transverse Beam Emittance – Laser Wire Scanners principle: laser wire provides a non-invasive and non-destructable target wire scanned across beam (or beam across wire) constituents: laser, optical transport line, interaction region and optics, detectors beam size measurements: forward scattered Co ...
... Transverse Beam Emittance – Laser Wire Scanners principle: laser wire provides a non-invasive and non-destructable target wire scanned across beam (or beam across wire) constituents: laser, optical transport line, interaction region and optics, detectors beam size measurements: forward scattered Co ...
Optical properties of metals and alloys
... for which some interesting phenomena have been recently observed. In §2, we review in general the principles of the optical properties of metals and alloys, including a discussion of the optical constants with their relations to intraband and interband transitions. In §3, we describe in detail the e ...
... for which some interesting phenomena have been recently observed. In §2, we review in general the principles of the optical properties of metals and alloys, including a discussion of the optical constants with their relations to intraband and interband transitions. In §3, we describe in detail the e ...
Noise-related resolution limit of dispersion measurements with white
... Spectral resolution, the accuracy of GDD determination, and the measurement time are the key parameters of every dispersion measurement. As with any Fourier spectrometer, the spectral resolution is determined by the inverse of the total scanning range (or time delay) over which data are recorded. Th ...
... Spectral resolution, the accuracy of GDD determination, and the measurement time are the key parameters of every dispersion measurement. As with any Fourier spectrometer, the spectral resolution is determined by the inverse of the total scanning range (or time delay) over which data are recorded. Th ...
Modes Effective Refractive Index Difference Measurement
... The effective refractive indices of the modes, and effective refractive index differences between the modes are important characteristics for few-mode optical fibers. By measuring the reflection spectrum of the fiber Bragg grating (FBG) fabricated in the few-mode fiber, some discrete information of ...
... The effective refractive indices of the modes, and effective refractive index differences between the modes are important characteristics for few-mode optical fibers. By measuring the reflection spectrum of the fiber Bragg grating (FBG) fabricated in the few-mode fiber, some discrete information of ...
Photoacoustic imaging velocimetry for flow
... of the FOV, the PA signal was received incompletely. Thus the image intensity in the center of the FOV was used as a standard to assess the improvement of image uniformity in contrast. After PA reconstruction, an image sequence according time can be acquired, and each image shows the absorbed optic ...
... of the FOV, the PA signal was received incompletely. Thus the image intensity in the center of the FOV was used as a standard to assess the improvement of image uniformity in contrast. After PA reconstruction, an image sequence according time can be acquired, and each image shows the absorbed optic ...
Theory of the transmission properties of an optical far-field superlens
... transmitted and incident transverse wavenumbers, respectively; ⌳ = 2 / d is the grating wavenumber, where d is the periodicity; and p is the diffraction order. We are interested only in waves transmitted in the far field, i.e., far enough from the FSL and the object plan that the contribution of ev ...
... transmitted and incident transverse wavenumbers, respectively; ⌳ = 2 / d is the grating wavenumber, where d is the periodicity; and p is the diffraction order. We are interested only in waves transmitted in the far field, i.e., far enough from the FSL and the object plan that the contribution of ev ...
Measurement of the Number of Atoms in a Magneto
... is done to reduce the linewidth of the laser. In an external cavity laser, the beam exiting the laser diode hits a grating at an angle. The first order beam is reflected back into the laser diode while the zeroth order beam is used in the experiment. Thus, mainly the wavelength that is back-reflecte ...
... is done to reduce the linewidth of the laser. In an external cavity laser, the beam exiting the laser diode hits a grating at an angle. The first order beam is reflected back into the laser diode while the zeroth order beam is used in the experiment. Thus, mainly the wavelength that is back-reflecte ...
Polarization effects and the calibration of a donut beam axial optical
... spatial light modulator (SLM); the advantage being that the SLM can dynamically adjust the imprinted phase. However, when focusing such a beam through a high-numerical aperture (N.A.) objective, polarization effects can significantly affect the intensity and phase profile [9, 10]. Numerical simulati ...
... spatial light modulator (SLM); the advantage being that the SLM can dynamically adjust the imprinted phase. However, when focusing such a beam through a high-numerical aperture (N.A.) objective, polarization effects can significantly affect the intensity and phase profile [9, 10]. Numerical simulati ...
Nonparaxial Mathieu and Weber Accelerating Beams Peng Zhang, Yi Hu, Tongcang Li,
... questions: Can a NAB bend itself along other trajectories rather than circles? If so, would such a beam maintain its nondiffracting and self-healing properties while bending to large angles and different paths? Is it possible to find a NAB that can be scaled to control the acceleration, thus leading ...
... questions: Can a NAB bend itself along other trajectories rather than circles? If so, would such a beam maintain its nondiffracting and self-healing properties while bending to large angles and different paths? Is it possible to find a NAB that can be scaled to control the acceleration, thus leading ...
Polarized Light
... Superposition of polarization vectors • Since the electric field is a vector, two light waves traveling in the same direction can be added by adding their electric field vectors – This just like what we did in interference, except there we didn’t talk about the direction of the field vector only it ...
... Superposition of polarization vectors • Since the electric field is a vector, two light waves traveling in the same direction can be added by adding their electric field vectors – This just like what we did in interference, except there we didn’t talk about the direction of the field vector only it ...
Refractive indexes of (Al,Ga,In)As epilayers on InP for optoelectronic
... We have minimized this error by performing the spectrophotometer background correction with a bare InP substrate (rather than a metal mirror). The fringe amplitude is the determined from a normalized reflectivity spectrum which oscillates around unity. The data of Pettit et al. [9] was used for the ...
... We have minimized this error by performing the spectrophotometer background correction with a bare InP substrate (rather than a metal mirror). The fringe amplitude is the determined from a normalized reflectivity spectrum which oscillates around unity. The data of Pettit et al. [9] was used for the ...
13 - Atomic Physics
... This setup will work fine for long pulse durations. However, when using pulses in the femtosecond-range this setup will not work at all. This is because the group velocity difference between the fundamental and second harmonic in the half wave plate introduces a delay between the two that is much lo ...
... This setup will work fine for long pulse durations. However, when using pulses in the femtosecond-range this setup will not work at all. This is because the group velocity difference between the fundamental and second harmonic in the half wave plate introduces a delay between the two that is much lo ...
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).