Generation of vortex beams by an image-rotating - AS
... Vortex beams can be conveniently expressed as unique linear combinations of LaguerreGauss modes. These are cylindrically symmetric modes characterized by two integer indices, p and m, which are unaltered by propagation. A line integral of the phase gradient around the dark beam center is equal to (m ...
... Vortex beams can be conveniently expressed as unique linear combinations of LaguerreGauss modes. These are cylindrically symmetric modes characterized by two integer indices, p and m, which are unaltered by propagation. A line integral of the phase gradient around the dark beam center is equal to (m ...
肖连团 - 山西大学
... Can we really catch hold of a single molecule? Single molecule studies do not mean taking one molecule and analyzing it. Its only that we are detecting one molecule at a time. Detection volume is 1 m3. When a fluorophore traverses the laser excitation volume, a fluorescence photon burst i ...
... Can we really catch hold of a single molecule? Single molecule studies do not mean taking one molecule and analyzing it. Its only that we are detecting one molecule at a time. Detection volume is 1 m3. When a fluorophore traverses the laser excitation volume, a fluorescence photon burst i ...
MONABIPHOT_All_Courses_2016
... Prerequisites : this course is intended towards student in need of an update in basic math. It does not require any special prerequisite . Prior to the course, screening tests will be organized to check on the level of students and orient them to this course when needed. Objectives : This course is ...
... Prerequisites : this course is intended towards student in need of an update in basic math. It does not require any special prerequisite . Prior to the course, screening tests will be organized to check on the level of students and orient them to this course when needed. Objectives : This course is ...
Design of illumination and projection optics for projectors with single
... single-DMD projectors.1–3 In this relatively intricate arrangement, a projection lens with an unusually small entrance pupil near the DMD is needed to leave adequate space for the illumination optics. Moreover, the illumination system incorporated with the projection lens must use a truncated conden ...
... single-DMD projectors.1–3 In this relatively intricate arrangement, a projection lens with an unusually small entrance pupil near the DMD is needed to leave adequate space for the illumination optics. Moreover, the illumination system incorporated with the projection lens must use a truncated conden ...
Theoretical and experimental investigation of the second
... when the pH of the medium is increased. In general terms, the absorption bands are consistent with the existence of -* electronic transitions.12 One can see in Fig. 2共a兲 that for an aqueous solution, the absorption spectrum at pH ⬃6.6共⬎pKa兲 is characterized by two absorption bands centered at ⬇460 ...
... when the pH of the medium is increased. In general terms, the absorption bands are consistent with the existence of -* electronic transitions.12 One can see in Fig. 2共a兲 that for an aqueous solution, the absorption spectrum at pH ⬃6.6共⬎pKa兲 is characterized by two absorption bands centered at ⬇460 ...
Analyzing optical spectra by computer simulation
... The last steps of spectrum analysis by computer simulation are the selection and adjustment of those model parameters which are to be determined by the method. Since the total fit deviation will depend on the fit parameter values in a very nonlinear and in most cases unpredictable way, there may be ...
... The last steps of spectrum analysis by computer simulation are the selection and adjustment of those model parameters which are to be determined by the method. Since the total fit deviation will depend on the fit parameter values in a very nonlinear and in most cases unpredictable way, there may be ...
Wavelength Converters in Optical Communication Systems
... wavelength to another without entering the electrical domain. A simple technique for the realization of this function is the use of cross gain modulation (XGM) in semiconductor optical amplifiers (SOA’s). The principle is depicted in Fig. 3.4.1(a)[9] [11] showing an intensity modulated input signal ...
... wavelength to another without entering the electrical domain. A simple technique for the realization of this function is the use of cross gain modulation (XGM) in semiconductor optical amplifiers (SOA’s). The principle is depicted in Fig. 3.4.1(a)[9] [11] showing an intensity modulated input signal ...
CASME: A CASE Tool for Spatial Data Marts Design and Generation
... Spatial data mining is an extraordinarily demanding field referring to extraction of implicit knowledge, spatial relationships, which are not explicitly stored into geographical databases [7]. In fact, the collected data can exceed human's capacity to analyze and extract interesting knowledge from l ...
... Spatial data mining is an extraordinarily demanding field referring to extraction of implicit knowledge, spatial relationships, which are not explicitly stored into geographical databases [7]. In fact, the collected data can exceed human's capacity to analyze and extract interesting knowledge from l ...
Proposal and testing of dual-beam dynamic light
... Figure 1共b兲 shows the experimental setup and optical arrangement. Incident laser beam LB from a solidstate laser 共Coherent Verdi兲 of wavelength ⫽ 532 nm is directed through Bragg cell BC. The incident beam becomes multiple diverging beams when passing through the Bragg cell, which acts as an optic ...
... Figure 1共b兲 shows the experimental setup and optical arrangement. Incident laser beam LB from a solidstate laser 共Coherent Verdi兲 of wavelength ⫽ 532 nm is directed through Bragg cell BC. The incident beam becomes multiple diverging beams when passing through the Bragg cell, which acts as an optic ...
Lecture 21 - Lehigh University
... Lecture 21: Abnormal Dispersion and Athermal Glasses Professor Rui Almeida ...
... Lecture 21: Abnormal Dispersion and Athermal Glasses Professor Rui Almeida ...
Quantum Optics and Photonics S. Ezekiel, S. Shahriar Plasma Physics
... scheme, coupling (C) and probe (P) field are used to write a grating in the ground state spin coherence via the resonance Raman interaction. This grating is read with a read beam (R) to produce a signal or diffracted beam (D). To further enhance signal to noise, a heterodyne detection scheme is used ...
... scheme, coupling (C) and probe (P) field are used to write a grating in the ground state spin coherence via the resonance Raman interaction. This grating is read with a read beam (R) to produce a signal or diffracted beam (D). To further enhance signal to noise, a heterodyne detection scheme is used ...
Nanosecond laser-induced breakdown in pure and - AS
... The objective of this work is to understand catastrophic optical damage in nanosecond pulsed fiber amplifiers. We used a pulsed, single longitudinal mode, TEM00 laser at 1.064 µm, with 7.5-nsec pulse duration, focused to a 7.45-µm-radius spot inside a fused silica window, to measure the single shot ...
... The objective of this work is to understand catastrophic optical damage in nanosecond pulsed fiber amplifiers. We used a pulsed, single longitudinal mode, TEM00 laser at 1.064 µm, with 7.5-nsec pulse duration, focused to a 7.45-µm-radius spot inside a fused silica window, to measure the single shot ...
Optical behavior
... the fiber axis can go all the way through the fiber, as off-axis rays need to be reflected too many times as they travel through the fiber and, as a result, tend to leak. • A large core (e.g., 50-200 m) means that both on-axis and off-axis rays make their way through the fiber. • A fiber with a lar ...
... the fiber axis can go all the way through the fiber, as off-axis rays need to be reflected too many times as they travel through the fiber and, as a result, tend to leak. • A large core (e.g., 50-200 m) means that both on-axis and off-axis rays make their way through the fiber. • A fiber with a lar ...
Noise-equivalent sensitivity of photoacoustics
... Photoacoustic tomography has been drawing the attention of the biomedical imaging community in the last decade.1 A cross-over between optical imaging and ultrasound imaging, photoacoustics harnesses both the exquisite molecular contrast of optical absorption and the low scattering of ultrasound. Cli ...
... Photoacoustic tomography has been drawing the attention of the biomedical imaging community in the last decade.1 A cross-over between optical imaging and ultrasound imaging, photoacoustics harnesses both the exquisite molecular contrast of optical absorption and the low scattering of ultrasound. Cli ...
Universal Description of Spherical Aberration Free Lenses
... familiar formulas for image position and magnification hold for any index. ...
... familiar formulas for image position and magnification hold for any index. ...
High-power passively mode-locked semiconductor lasers
... bow-tie amplifier geometries [4]. Such techniques increase the complexity of the system and are still currently limited to average powers well below 1 W. In recent years, it has been discovered that semiconductor lasers with surface-emitting geometries allow for much larger mode areas, particularly ...
... bow-tie amplifier geometries [4]. Such techniques increase the complexity of the system and are still currently limited to average powers well below 1 W. In recent years, it has been discovered that semiconductor lasers with surface-emitting geometries allow for much larger mode areas, particularly ...
The Fabry-Pérot Interferometer
... on n, σ, a, and cos ϕ, we may imagine that the abscissa is scaled with anyone of these four parameters. The phase shift αR may be set to zero, because we shall be interested only in the difference of φ values. The closer the reflection coefficient R is to one, the larger is M and the sharper are the ...
... on n, σ, a, and cos ϕ, we may imagine that the abscissa is scaled with anyone of these four parameters. The phase shift αR may be set to zero, because we shall be interested only in the difference of φ values. The closer the reflection coefficient R is to one, the larger is M and the sharper are the ...
What are Fiber Optics
... made from material such as AlGaAs or GaAsP light is emitted when electrons and holes recombine either surface emitting or edge emitting Injection Laser Diodes (ILD) ...
... made from material such as AlGaAs or GaAsP light is emitted when electrons and holes recombine either surface emitting or edge emitting Injection Laser Diodes (ILD) ...
A simple peak-to-average power ratio reduction
... transmission systems, for its high spectral efficiency, relatively low bit rate and advanced robustness against chromatic dispersion and polarization mode dispersion [1-3]. Conventional optical OFDM systems utilize electronic fast Fourier transform (FFT) circuits and complicated digital to analog (D ...
... transmission systems, for its high spectral efficiency, relatively low bit rate and advanced robustness against chromatic dispersion and polarization mode dispersion [1-3]. Conventional optical OFDM systems utilize electronic fast Fourier transform (FFT) circuits and complicated digital to analog (D ...
prezantacia aj
... until they reach the point at which connectors are attached. Until the connectors are attached, there is no need for twisting or shielding, because no light escapes when it is inside a fiber. This means there are no crosstalk issues with fiber. It is very common to see multiple fiber pairs encased i ...
... until they reach the point at which connectors are attached. Until the connectors are attached, there is no need for twisting or shielding, because no light escapes when it is inside a fiber. This means there are no crosstalk issues with fiber. It is very common to see multiple fiber pairs encased i ...
Fundamental Limits in Confocal Microscopy
... The data recorded from a confocal microscope will, in the simplest case, be a set of intensity values (usually representing the concentration of fluorophore) for every voxel throughout a 3D volume within the specimen. Though these data may often be displayed as an image, it should always be remember ...
... The data recorded from a confocal microscope will, in the simplest case, be a set of intensity values (usually representing the concentration of fluorophore) for every voxel throughout a 3D volume within the specimen. Though these data may often be displayed as an image, it should always be remember ...
3D optical data storage
3D optical data storage is the term given to any form of optical data storage in which information can be recorded and/or read with three-dimensional resolution (as opposed to the two-dimensional resolution afforded, for example, by CD).This innovation has the potential to provide petabyte-level mass storage on DVD-sized discs (120mm). Data recording and readback are achieved by focusing lasers within the medium. However, because of the volumetric nature of the data structure, the laser light must travel through other data points before it reaches the point where reading or recording is desired. Therefore, some kind of nonlinearity is required to ensure that these other data points do not interfere with the addressing of the desired point.No commercial product based on 3D optical data storage has yet arrived on the mass market, although several companies are actively developing the technology and claim that it may become available ""soon"".