development and verification of the non
... exoplanets and disks around nearby stars requires high accuracy control of low-order modes that dominate atmospheric turbulence and scatter light at small angles where exoplanets are likely to be found. Imaging planets using a high contrast coronagraphic camera, as is the case for the Spectro-Polari ...
... exoplanets and disks around nearby stars requires high accuracy control of low-order modes that dominate atmospheric turbulence and scatter light at small angles where exoplanets are likely to be found. Imaging planets using a high contrast coronagraphic camera, as is the case for the Spectro-Polari ...
Waveguide Simualtion Using Mode Matching Method
... Matched Layer framework for asymmetric structures is improved with the introduction of Weighted Optical Path Distance, which provides better numerical results for asymmetric structures. Typical waveguide structures including bending structures, straight-bendingstraight structures, long-period gratin ...
... Matched Layer framework for asymmetric structures is improved with the introduction of Weighted Optical Path Distance, which provides better numerical results for asymmetric structures. Typical waveguide structures including bending structures, straight-bendingstraight structures, long-period gratin ...
Fabrication of functional surfaces using ultrashort laser pulse ablation
... with replication methods. It is well known that sufficiently small surface structures reflect and deflect light in a way that can not be handled with geometrical optics. Naturally, when considering materials like metals, only reflected waves are observed. If the periodicity of the structures is in t ...
... with replication methods. It is well known that sufficiently small surface structures reflect and deflect light in a way that can not be handled with geometrical optics. Naturally, when considering materials like metals, only reflected waves are observed. If the periodicity of the structures is in t ...
ANALOG SIGNAL PROCESSING FOR OPTICAL COHERENCE
... STATEMENT BY AUTHOR This dissertation has been submitted in partial fulfillment of requirements for an advanced degree at The University of Arizona and is deposited in the University Library to be made available to borrowers under rules of the Library. ...
... STATEMENT BY AUTHOR This dissertation has been submitted in partial fulfillment of requirements for an advanced degree at The University of Arizona and is deposited in the University Library to be made available to borrowers under rules of the Library. ...
TIE-29 Refractive Index and Dispersion
... 2 °C/h. By measuring the change in refractive index of the reference sample the refractive index of the sample can be measured with moderate accuracy in the range of ± 10– 4. The annealing rate dependence of the Abbe number and refractive index of each glass is represented by a line in the diagra ...
... 2 °C/h. By measuring the change in refractive index of the reference sample the refractive index of the sample can be measured with moderate accuracy in the range of ± 10– 4. The annealing rate dependence of the Abbe number and refractive index of each glass is represented by a line in the diagra ...
TIE-29 Refractive Index and Dispersion
... 2 °C/h. By measuring the change in refractive index of the reference sample the refractive index of the sample can be measured with moderate accuracy in the range of ± 10– 4. The annealing rate dependence of the Abbe number and refractive index of each glass is represented by a line in the diagra ...
... 2 °C/h. By measuring the change in refractive index of the reference sample the refractive index of the sample can be measured with moderate accuracy in the range of ± 10– 4. The annealing rate dependence of the Abbe number and refractive index of each glass is represented by a line in the diagra ...
Confocal optical microscopy
... This paper is about optical confocal microscopy, a subset of the extensive and well developed field of microscopy. I will speak briefly of microscopes, to fix the terminology and to illustrate the differences in the later sections, but I urge the reader not to treat this as a complete description of ...
... This paper is about optical confocal microscopy, a subset of the extensive and well developed field of microscopy. I will speak briefly of microscopes, to fix the terminology and to illustrate the differences in the later sections, but I urge the reader not to treat this as a complete description of ...
THE STRUCTURE OF HIGH STREHL RATIO POINT
... In general, the PSF of an adaptively corrected optical system consists of a diffraction limited core (e.g., an Airy function for a circular aperture) superposed on an extended halo composed of numerous ‘‘ speckles ’’ that result from the uncorrected components of the wave front. If we characterize at ...
... In general, the PSF of an adaptively corrected optical system consists of a diffraction limited core (e.g., an Airy function for a circular aperture) superposed on an extended halo composed of numerous ‘‘ speckles ’’ that result from the uncorrected components of the wave front. If we characterize at ...
parametric interactions of short optical pulses in quasi
... The Fejer students are a uniquely talented and generous group who have made work both productive and enjoyable. I should thank first Gena Imeshev, with whom I began my investigation into ultrafast nonlinear optics. He had a knack for extracting the essentials of complicated theoretical problems, and ...
... The Fejer students are a uniquely talented and generous group who have made work both productive and enjoyable. I should thank first Gena Imeshev, with whom I began my investigation into ultrafast nonlinear optics. He had a knack for extracting the essentials of complicated theoretical problems, and ...
optical properties of skin, subcutaneous, and muscle tissues
... and indirect methods.112 Direct methods include those based on some fundamental concepts and rules such as the BouguerBeerLambert law, the single-scattering phase function for thin samples, or the e®ective light penetration depth for slabs. The parameters measured are the collimated light transmi ...
... and indirect methods.112 Direct methods include those based on some fundamental concepts and rules such as the BouguerBeerLambert law, the single-scattering phase function for thin samples, or the e®ective light penetration depth for slabs. The parameters measured are the collimated light transmi ...
Optimal wave-front reconstruction strategies for
... the phase reconstruction is studied carefully, and the prior knowledge available both on turbulence and on noise statistics has been incorporated into the reconstruction. Note that, in the paper, we consider only open-loop conditions; that is, all the wave-front statistics are derived from the Kolmo ...
... the phase reconstruction is studied carefully, and the prior knowledge available both on turbulence and on noise statistics has been incorporated into the reconstruction. Note that, in the paper, we consider only open-loop conditions; that is, all the wave-front statistics are derived from the Kolmo ...
Light Microscopy
... “Confocal microscopy,” and “Recent microscopy techniques.” Wide-field microscopy relates to the ordinary, classic microscope. The name derives from the fact that the entire field of view in the microscope is uniformly illuminated, and can be viewed through eyepieces or photographed using a camera. I ...
... “Confocal microscopy,” and “Recent microscopy techniques.” Wide-field microscopy relates to the ordinary, classic microscope. The name derives from the fact that the entire field of view in the microscope is uniformly illuminated, and can be viewed through eyepieces or photographed using a camera. I ...
Optimally designed narrowband guided
... specular and transmitted directions assisted by the grating periodic structure as well as optical absorption in the waveguide layer structure. For this reason, such guided modes are also called “leaky modes.” The constructive interference of waves in the specular direction creates peak reflection e ...
... specular and transmitted directions assisted by the grating periodic structure as well as optical absorption in the waveguide layer structure. For this reason, such guided modes are also called “leaky modes.” The constructive interference of waves in the specular direction creates peak reflection e ...
Fluctuations in Quantum Degenerate Fermi Gases
... state. A localized atom counting in repeated absorption images was performed to obtain the number statistics. In this regard this experiment was paradigmatic for a new generation of cold atoms experiments that can now provide single-site resolved imaging of atoms in optical lattices allowing high fid ...
... state. A localized atom counting in repeated absorption images was performed to obtain the number statistics. In this regard this experiment was paradigmatic for a new generation of cold atoms experiments that can now provide single-site resolved imaging of atoms in optical lattices allowing high fid ...
Microscopy - PSSurvival.com
... intrinsic fluorescence of the protein or by using transmission microscopy. Both methods require an ultraviolet microscope as protein absorbs light at 280 nm. Protein will also fluorescence at approximately 353 nm when excited with 280 nm light.[4] Since fluorescence emission differs in wavelength (c ...
... intrinsic fluorescence of the protein or by using transmission microscopy. Both methods require an ultraviolet microscope as protein absorbs light at 280 nm. Protein will also fluorescence at approximately 353 nm when excited with 280 nm light.[4] Since fluorescence emission differs in wavelength (c ...
A minimally invasive in-fibre Bragg grating sensor
... the Bragg wavelength, denoted by B , are caused by force-induced strains, z , x , y , ...
... the Bragg wavelength, denoted by B , are caused by force-induced strains, z , x , y , ...
TIE-29: Refractive Index and Dispersion
... After melting the optical glass is cooled down at a high annealing rate. To control the refractive index during the melting process samples are taken directly from the melt after each casting. These samples are cooled down very fast together with a reference sample of the same glass. The reference s ...
... After melting the optical glass is cooled down at a high annealing rate. To control the refractive index during the melting process samples are taken directly from the melt after each casting. These samples are cooled down very fast together with a reference sample of the same glass. The reference s ...
Relation between nonlinear refractive index and
... would be performed all-optically through the use of thirdorder optical nonlinearities. Thus, in recent years, thirdorder nonlinearities have been studied experimentally in a large variety of artificial materials, which include homogeneous bulk glasses and polymers2,3 and nano- and mesoscopically str ...
... would be performed all-optically through the use of thirdorder optical nonlinearities. Thus, in recent years, thirdorder nonlinearities have been studied experimentally in a large variety of artificial materials, which include homogeneous bulk glasses and polymers2,3 and nano- and mesoscopically str ...
To be published in Optics Letters: Title: Generation of linear and nonlinear nonparaxial accelerating beams Peng Zhang, Yi Hu, Drake Cannan, Alessandro Salandrino, Tongcang Li Li,
... that these NABs as found from the Helmholtz equation without the paraxial approximation preserve their shapes even under different nonlinearities. Experimentally, we generate these NABs with a spatial light modulator (SLM), and observe their large-angle bending paths in colloidal suspension of polys ...
... that these NABs as found from the Helmholtz equation without the paraxial approximation preserve their shapes even under different nonlinearities. Experimentally, we generate these NABs with a spatial light modulator (SLM), and observe their large-angle bending paths in colloidal suspension of polys ...
Growth and Nano-structural Studies of Metallic Multilayers for X-ray Mirrors Naureen Ghafoor
... temperature plasma and for exploring the fascinating world of cosmology and astronomy by solar imaging instruments or deep space telescopes operating at wavelength of natural X-ray sources [1]-[5]. In short, the advanced optical elements needed for realizing the above mentioned instrumentation are i ...
... temperature plasma and for exploring the fascinating world of cosmology and astronomy by solar imaging instruments or deep space telescopes operating at wavelength of natural X-ray sources [1]-[5]. In short, the advanced optical elements needed for realizing the above mentioned instrumentation are i ...
Get
... is also constructed by taking two beams, i.e., N = 2, called primary and secondary, but additionally by setting the source size in the secondary beam to be lower than that of the first beam, simultaneously equating the displacement parameters to zero. The amplitude factors for the cos– Gaussian beam ...
... is also constructed by taking two beams, i.e., N = 2, called primary and secondary, but additionally by setting the source size in the secondary beam to be lower than that of the first beam, simultaneously equating the displacement parameters to zero. The amplitude factors for the cos– Gaussian beam ...
Understanding Laser Beam Parameters Leads to Better System
... minimum diameter and divergence angle. It is a measure of how well photons in the beam are localized in the transverse plane as they propagate. Acc. to the uncertainty principle, there is a minimum possible product of waist diameter times divergence, corresponding to a diffraction-limited beam. Beam ...
... minimum diameter and divergence angle. It is a measure of how well photons in the beam are localized in the transverse plane as they propagate. Acc. to the uncertainty principle, there is a minimum possible product of waist diameter times divergence, corresponding to a diffraction-limited beam. Beam ...
Counterpropagating optical beams and solitons
... the mutual change of the optical refractive index. A configuration of two waves interacting in a NL material is one of the most frequent ones in laser physics and wave mixing experiments. Numerous concepts in NL optics, such as phase conjugation, Bragg reflection by volume gratings, wave-mixing in pho ...
... the mutual change of the optical refractive index. A configuration of two waves interacting in a NL material is one of the most frequent ones in laser physics and wave mixing experiments. Numerous concepts in NL optics, such as phase conjugation, Bragg reflection by volume gratings, wave-mixing in pho ...
Role of wavefront aberrations of amplified femtosecond pulses in
... SPIDER: Spectral Phase Interferometry for Direct Electric field Reconstruction SPM: Self Phase Modulation ...
... SPIDER: Spectral Phase Interferometry for Direct Electric field Reconstruction SPM: Self Phase Modulation ...
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).