1. Introduction
... occurs if the two photons are indistinguishable in all degrees of freedom, i.e. the photons have the same wavelength, polarization and spatio-temporal mode. In such a case the first two possibilities - when both photons are transmitted (Fig.1a) or reflected (Fig.1b) - cannot be distinguished from on ...
... occurs if the two photons are indistinguishable in all degrees of freedom, i.e. the photons have the same wavelength, polarization and spatio-temporal mode. In such a case the first two possibilities - when both photons are transmitted (Fig.1a) or reflected (Fig.1b) - cannot be distinguished from on ...
Optical Fabrication - University of Arizona
... The goal of most optical engineering is to develop hardware that uses optical components such as lenses, prisms, mirrors, and windows. The purpose of this chapter is to summarize the principles and technologies used to manufacture these components, with the goal of helping the optical engineer to un ...
... The goal of most optical engineering is to develop hardware that uses optical components such as lenses, prisms, mirrors, and windows. The purpose of this chapter is to summarize the principles and technologies used to manufacture these components, with the goal of helping the optical engineer to un ...
Picosecond-pulse amplification with an external passive optical cavity
... enhancing pulse energies. Long-cavity lasers can provide pulse energies of 90 nJ at repetition rates as low as 4 MHz,4 and cavity dumping allows f lexible control of the pulse repetition rates as high as several megahertz.5 However, in Ti:sapphire systems one can typically boost peak powers by only ...
... enhancing pulse energies. Long-cavity lasers can provide pulse energies of 90 nJ at repetition rates as low as 4 MHz,4 and cavity dumping allows f lexible control of the pulse repetition rates as high as several megahertz.5 However, in Ti:sapphire systems one can typically boost peak powers by only ...
Sensitivity Analysis of a Position Device with Quadrant Photodiode
... spot. Comparing of the output currents received from each of the four quadrants, the position of the spot on the surface can be determined. Thus, in general, photo-detection system can be functionally divided into two main parts: a sensing stage and a post-processing one. In the second one, the sign ...
... spot. Comparing of the output currents received from each of the four quadrants, the position of the spot on the surface can be determined. Thus, in general, photo-detection system can be functionally divided into two main parts: a sensing stage and a post-processing one. In the second one, the sign ...
Get PDF - OSA Publishing
... switching of fluorophores between fluorescent on and off states. STED achieves this by depleting fluorescence in the periphery of a confocal excitation beam via stimulated emission. In SMLM, physical or chemical methods are used to control the number of fluorophores that are in the on state, such th ...
... switching of fluorophores between fluorescent on and off states. STED achieves this by depleting fluorescence in the periphery of a confocal excitation beam via stimulated emission. In SMLM, physical or chemical methods are used to control the number of fluorophores that are in the on state, such th ...
TIE-41 Large Optical Glass Blanks
... After a first inspection for striae, bubbles and inclusions, the glass blank will be fineannealed. This is the most time-consuming process in the production of large optical glass blanks. The fine-annealing process determines the final refractive index, the optical homogeneity and the stress birefri ...
... After a first inspection for striae, bubbles and inclusions, the glass blank will be fineannealed. This is the most time-consuming process in the production of large optical glass blanks. The fine-annealing process determines the final refractive index, the optical homogeneity and the stress birefri ...
L. Koechlin Optical principles of diffraction focusing
... "pro" Fresnel Arrays: No mirror, no lens : just vacuum and opaque material (except near focal plane). broad spectral domain: λ = 90nm (UV) to (IR) 25μm High angular resolution: as a solid aperture the size of the array. High dynamic range: 108 on compact objects, more with coronagraphy & postproces ...
... "pro" Fresnel Arrays: No mirror, no lens : just vacuum and opaque material (except near focal plane). broad spectral domain: λ = 90nm (UV) to (IR) 25μm High angular resolution: as a solid aperture the size of the array. High dynamic range: 108 on compact objects, more with coronagraphy & postproces ...
Label-free super-resolution imaging of adenoviruses by submerged
... Demonstration of super-resolution imaging by SMON To demonstrate the super-resolution capability of large-microsphere (100 mm) SMON and to calibrate the imaging system, a Blu-Ray DVD disk with approximately 100-nm line spacing was imaged using an optical microscope (503, NA50.75) with a 100-mm diame ...
... Demonstration of super-resolution imaging by SMON To demonstrate the super-resolution capability of large-microsphere (100 mm) SMON and to calibrate the imaging system, a Blu-Ray DVD disk with approximately 100-nm line spacing was imaged using an optical microscope (503, NA50.75) with a 100-mm diame ...
幻灯片 1 - USTC, ICTS
... Reason: A: The test of solitons in nonuniform media with time-dependent density gradients .（spatial soliton） B: The test of the core medium of the real fibers, which cannot be homogeneous, fiber loss is inevitable, and dissipation weakens the nonlinearity.（temporal soliton） Novel Soliton Solutions o ...
... Reason: A: The test of solitons in nonuniform media with time-dependent density gradients .（spatial soliton） B: The test of the core medium of the real fibers, which cannot be homogeneous, fiber loss is inevitable, and dissipation weakens the nonlinearity.（temporal soliton） Novel Soliton Solutions o ...
Variable Incidence Angle Fluorescence Interference Contrast
... with the surface. It would be desirable to obtain information on the distance of these fluorescent objects or time-dependent changes in their distance from the surface with the highest possible spatial resolution in the direction normal to the surface, the z axis. To reconstruct images with high z-r ...
... with the surface. It would be desirable to obtain information on the distance of these fluorescent objects or time-dependent changes in their distance from the surface with the highest possible spatial resolution in the direction normal to the surface, the z axis. To reconstruct images with high z-r ...
- Phasics
... within the plasma and not an average response to an interdependent ensemble of speckles that have various intensities. Thus it allows the theoretical models to be validated and the simulation codes to be assessed on a level of reduced complexity. Also, reducing the needed size of the simulation boxe ...
... within the plasma and not an average response to an interdependent ensemble of speckles that have various intensities. Thus it allows the theoretical models to be validated and the simulation codes to be assessed on a level of reduced complexity. Also, reducing the needed size of the simulation boxe ...
Preview of “ZEISS Microscopy Online ...Aperture and Resolution”
... sine of 90 degrees is equal to one, which suggests that numerical aperture is limited not only by the angular aperture, but also by the imaging medium refractive index. Practically, aperture angles exceeding 70 to 80 degrees are found only in the highest-perf ...
... sine of 90 degrees is equal to one, which suggests that numerical aperture is limited not only by the angular aperture, but also by the imaging medium refractive index. Practically, aperture angles exceeding 70 to 80 degrees are found only in the highest-perf ...
Rate equation model of bulk optical damage of silica - AS
... silica at 1064 nm for 8 ns and 14 ps pulses. The 8 ns pulse is single longitudinal mode from a Q-switched laser, and the 14 ps pulse is from a Q-switched mode-lock laser. The beams in both cases are TEM00 mode, and they are focused to a 7.5 µm spot inside a fused silica window. The pulse-to-pulse en ...
... silica at 1064 nm for 8 ns and 14 ps pulses. The 8 ns pulse is single longitudinal mode from a Q-switched laser, and the 14 ps pulse is from a Q-switched mode-lock laser. The beams in both cases are TEM00 mode, and they are focused to a 7.5 µm spot inside a fused silica window. The pulse-to-pulse en ...
Optical properties of small-bore hollow glass waveguides
... higher than those in Fig. 2. However, approximately 25 W of maximum input power with the 250-µm-bore guide and 50 W of power with the 320-µm-bore guide will still be useful. In this experiment the high coupling loss caused the input end to melt, so we feel that a much higher power can be delivered b ...
... higher than those in Fig. 2. However, approximately 25 W of maximum input power with the 250-µm-bore guide and 50 W of power with the 320-µm-bore guide will still be useful. In this experiment the high coupling loss caused the input end to melt, so we feel that a much higher power can be delivered b ...
Optical trapping and manipulation of neutral particles
... force with decreasing height near E and the transverse confinement of the gradient force. Once aloft, levitated particles can be freely manipulated by simply moving the beam. With a pair of movable beams, one can assemble compound particles like spheroids, teardrops, spherical doublets, triplets, et ...
... force with decreasing height near E and the transverse confinement of the gradient force. Once aloft, levitated particles can be freely manipulated by simply moving the beam. With a pair of movable beams, one can assemble compound particles like spheroids, teardrops, spherical doublets, triplets, et ...
Long-distance vision
... of the signal can be performed electronically at the receiver rather than optically using in-line modules, greatly reducing the benefits conferred by the low dispersion of NZDS fibres. What does become more critical, however, is the optical signal-to-noise ratio (OSNR). Since QAM-based modulation fo ...
... of the signal can be performed electronically at the receiver rather than optically using in-line modules, greatly reducing the benefits conferred by the low dispersion of NZDS fibres. What does become more critical, however, is the optical signal-to-noise ratio (OSNR). Since QAM-based modulation fo ...
Pulsed Quasi-monochromatic x-ray source for radiography
... between x-ray source to target and target to detector (which is required to record an event (laser shocked target) of size approximately 150 to 200 µm). The x-ray radiograph of S. S. wire, S. S. mesh and 20 µm Al foil have been recorded. Figure 4a shows the optical microscope image of the 400 µm thi ...
... between x-ray source to target and target to detector (which is required to record an event (laser shocked target) of size approximately 150 to 200 µm). The x-ray radiograph of S. S. wire, S. S. mesh and 20 µm Al foil have been recorded. Figure 4a shows the optical microscope image of the 400 µm thi ...
The Equation of Number the Total Internal of Reflection Angles
... more through the lower-index periphery of the core, rather than the high-index center. The index profile is chosen to minimum the difference in axial propagation speed of the various rays in the fiber. This ideal index profile is very close to a parabolic relationship between the index and distance ...
... more through the lower-index periphery of the core, rather than the high-index center. The index profile is chosen to minimum the difference in axial propagation speed of the various rays in the fiber. This ideal index profile is very close to a parabolic relationship between the index and distance ...
Optical field profile evaluation on silica high Optical field profile
... as we it is the absorption wavelength of CO2. As is shown in Fig. 2, a certain portion of optical field exists out of the waveguide. Thus, measuring the gas absorption is possible for applying a certain portion of optical field propagating out of the waveguide. Hence, we confirmed that a certain por ...
... as we it is the absorption wavelength of CO2. As is shown in Fig. 2, a certain portion of optical field exists out of the waveguide. Thus, measuring the gas absorption is possible for applying a certain portion of optical field propagating out of the waveguide. Hence, we confirmed that a certain por ...
Frequency domain optical parametric amplification - few
... focused to a 200 mm spot size in the FP. This spot size in combination with grating dispersion and focal length of M1 define the seed pulse duration in the FP, which is about 1.4ps as explained in the Methods section and supplementary Fig. 2. The FP contains four identical type I BBO crystals. Each c ...
... focused to a 200 mm spot size in the FP. This spot size in combination with grating dispersion and focal length of M1 define the seed pulse duration in the FP, which is about 1.4ps as explained in the Methods section and supplementary Fig. 2. The FP contains four identical type I BBO crystals. Each c ...
Imaging Properties of Laser-Produced Parabolic Profile Microlenses
... cross-section for five concave microlenses is presented in Fig. 2. The PSF can be considered as the representation of illumination intensity of point object. If aberrations of an optical system are small then the illumination intensity of point object of real optical system is close to one of ideal ...
... cross-section for five concave microlenses is presented in Fig. 2. The PSF can be considered as the representation of illumination intensity of point object. If aberrations of an optical system are small then the illumination intensity of point object of real optical system is close to one of ideal ...
Experiments with Diffraction
... What would be a common object to compare the thicknesses using diffraction? A human hair is ideal to compare in a classroom! For middle schoolers: students can compare the width of the diffraction pattern for different hairs measured. Keep the laser and the distance, D, to the wall or screen the sa ...
... What would be a common object to compare the thicknesses using diffraction? A human hair is ideal to compare in a classroom! For middle schoolers: students can compare the width of the diffraction pattern for different hairs measured. Keep the laser and the distance, D, to the wall or screen the sa ...
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"".