Theoretical analysis of phase-matched second
... SHG and OPO in the m ⫽ 0 mode are not significantly changed from those of the bulk material given in Refs. 14 –16. However, the phase-matching angles for SHG coupling from the m ⫽ 0 to the m ⫽ 2 mode for a 16-m guide shown in Fig. 2 are significantly different and much more attractive than those of ...
... SHG and OPO in the m ⫽ 0 mode are not significantly changed from those of the bulk material given in Refs. 14 –16. However, the phase-matching angles for SHG coupling from the m ⫽ 0 to the m ⫽ 2 mode for a 16-m guide shown in Fig. 2 are significantly different and much more attractive than those of ...
Design and Characteristics of Photonic Crystal Based Optical NOT
... Interferometer (MZI) based on self-collimation, periodically poled lithium noibate (PPLN) waveguide, photonic crystal selfcollimated beam with a phase lag, semiconductor saturable absorber etalons, nonlinear ring resonators inserted between three parallel line defects, etc. There were some shortcomi ...
... Interferometer (MZI) based on self-collimation, periodically poled lithium noibate (PPLN) waveguide, photonic crystal selfcollimated beam with a phase lag, semiconductor saturable absorber etalons, nonlinear ring resonators inserted between three parallel line defects, etc. There were some shortcomi ...
Molten-core fabrication of novel optical fibers
... The resultant core glasses contain much higher yttria and alumina concentrations than would otherwise be possible, opening the door to “novel fibers from common materials” (just not common when it comes to optical fibers). For example, the YAG-derived fibers with high yttria and alumina contents hav ...
... The resultant core glasses contain much higher yttria and alumina concentrations than would otherwise be possible, opening the door to “novel fibers from common materials” (just not common when it comes to optical fibers). For example, the YAG-derived fibers with high yttria and alumina contents hav ...
OPTOMETRY
... pre-presbyopic accommodative decompensation. Given the transient hyperopic shift induced by the disease, a failure to identify CSCR in pre-operative evaluation for hyperopic refractive correction could have resulted in inappropriate overcorrection. Contrast sensitivity forms a powerful non-invasive ...
... pre-presbyopic accommodative decompensation. Given the transient hyperopic shift induced by the disease, a failure to identify CSCR in pre-operative evaluation for hyperopic refractive correction could have resulted in inappropriate overcorrection. Contrast sensitivity forms a powerful non-invasive ...
Effect of wavelength on in vivo images of the human cone mosaic
... 550, 650, and 750 nm wavelengths, respectively. The position of the entrance pupil was translated both vertically and horizontally in 1 mm increments until the best pupil image was observed on the CCD camera. The best image was defined as the position in which the intensity of the directional compon ...
... 550, 650, and 750 nm wavelengths, respectively. The position of the entrance pupil was translated both vertically and horizontally in 1 mm increments until the best pupil image was observed on the CCD camera. The best image was defined as the position in which the intensity of the directional compon ...
Chapter two_part B
... ▪ caused by microscopic non-uniformities making light rays partially scatter ▪ nearly 90% of total attenuation is attributed to Raleigh Scattering ▪ becomes important when wavelengths are short - comparable to size of the structures in the glass: long wavelengths are less affected than short ...
... ▪ caused by microscopic non-uniformities making light rays partially scatter ▪ nearly 90% of total attenuation is attributed to Raleigh Scattering ▪ becomes important when wavelengths are short - comparable to size of the structures in the glass: long wavelengths are less affected than short ...
Dispersion Compensation using a Prism-pair
... [7, 8, 9] by controlling the spectral properties of the pulses. For this end, many types of pulse-shaping techniques and configurations are very common in spectroscopy-oriented experiments. When complete control of the spectral amplitude and phase is required, a general Fourier-domain pulse-shaper [ ...
... [7, 8, 9] by controlling the spectral properties of the pulses. For this end, many types of pulse-shaping techniques and configurations are very common in spectroscopy-oriented experiments. When complete control of the spectral amplitude and phase is required, a general Fourier-domain pulse-shaper [ ...
Synopsis by Andy Bullard
... determine the relative orientation and parity of the LOS and image vectors after passing through a series of plane mirrors. The paper begins by citing examples of optical transformations, and basis transformation. For example, to find the LOS vector of a system as being the reflection of the optical ...
... determine the relative orientation and parity of the LOS and image vectors after passing through a series of plane mirrors. The paper begins by citing examples of optical transformations, and basis transformation. For example, to find the LOS vector of a system as being the reflection of the optical ...
Tech Notes Wavelength 2012 | www.ll.mit.edu
... diode-pumped lasers (fiber, solid state) • Graceful degradation when some individual diodes age—no singlepoint of failure • Ability to withstand unplanned (but typical) optical feedback—will not fail if optical feedback occurs from the metal sample being cut • Relative lower cost • Compact size • Wa ...
... diode-pumped lasers (fiber, solid state) • Graceful degradation when some individual diodes age—no singlepoint of failure • Ability to withstand unplanned (but typical) optical feedback—will not fail if optical feedback occurs from the metal sample being cut • Relative lower cost • Compact size • Wa ...
incoherent
... The resolution question [Rayleigh, 1879]: when do we cease to be able to resolve the two point sources (i.e., tell them apart) due to the blurring introduced in the image by the finite (NA)? MIT 2.71/2.710 Optics 11/10/04 wk10-b-34 ...
... The resolution question [Rayleigh, 1879]: when do we cease to be able to resolve the two point sources (i.e., tell them apart) due to the blurring introduced in the image by the finite (NA)? MIT 2.71/2.710 Optics 11/10/04 wk10-b-34 ...
Optically induced forces in scanning probe microscopy
... been considerable research involving the use of fluorescence tagging to generate images with better than diffraction limited resolution. Stochastic optical reconstruction microscopy (STORM), photoactivated localization microscopy (PALM), saturated structured illumination microscopy (SSIM), and stimu ...
... been considerable research involving the use of fluorescence tagging to generate images with better than diffraction limited resolution. Stochastic optical reconstruction microscopy (STORM), photoactivated localization microscopy (PALM), saturated structured illumination microscopy (SSIM), and stimu ...
Long, Formal Report
... permanently written into the core of single-mode optical fiber that enables the type of wavelength precision that is necessary for DWDM systems to successfully combine, control, and route multiple ‘colors’ of light within a single optical fiber” (Newton 294). ...
... permanently written into the core of single-mode optical fiber that enables the type of wavelength precision that is necessary for DWDM systems to successfully combine, control, and route multiple ‘colors’ of light within a single optical fiber” (Newton 294). ...
Micro- and Nanotechnologies for Optical Neural Interfaces
... addressable light emission points with multiple shanks arranged in three-dimensions using a micro-fabricated baseplate holder (Figure 1F; Zorzos et al., 2012). Each shank contains several light emission points in the same configuration of Zorzos et al. (2010), each of which can be independently addr ...
... addressable light emission points with multiple shanks arranged in three-dimensions using a micro-fabricated baseplate holder (Figure 1F; Zorzos et al., 2012). Each shank contains several light emission points in the same configuration of Zorzos et al. (2010), each of which can be independently addr ...
Ultrashort light bullets described by the two-dimensional sine
... major areas of modern ultrafast optics. These studies led to remarkable achievements in the field of extreme nonlinear optics, time-resolved laser spectroscopy, generation of soft x-ray radiation, and isolated and controlled attosecond light pulses in the extreme ultraviolet regime, thereby opening ...
... major areas of modern ultrafast optics. These studies led to remarkable achievements in the field of extreme nonlinear optics, time-resolved laser spectroscopy, generation of soft x-ray radiation, and isolated and controlled attosecond light pulses in the extreme ultraviolet regime, thereby opening ...
Optical spectroscopy techniques
... at narrow angular interval ǻȕ around the principal maxima ȕm ...
... at narrow angular interval ǻȕ around the principal maxima ȕm ...
Nonpenetrating Deep Sclerectomy
... from between the 11- and 1-o’clock positions, which was infiltrated with blackened material (possibly carbon from a projectile firework or pencil). One week postoperatively, the acuity in the patient’s left eye had improved to 20/30, and her IOP was 4 mm Hg. The broad, low-profile Figure 4. A preope ...
... from between the 11- and 1-o’clock positions, which was infiltrated with blackened material (possibly carbon from a projectile firework or pencil). One week postoperatively, the acuity in the patient’s left eye had improved to 20/30, and her IOP was 4 mm Hg. The broad, low-profile Figure 4. A preope ...
Phase contrast and DIC - Nikon Imaging Center at UCSF
... Sensitive to phase gradients Contrast best along the direction of shear Objects appear shaded or in pseudo 3D relief ...
... Sensitive to phase gradients Contrast best along the direction of shear Objects appear shaded or in pseudo 3D relief ...
21. Specific rotation of sugar solution
... the direction axis. Cross-wave polarization in general, stands for disorder of axis-symmetry according to the spreading direction. Polarized light is divided into categories by the projection of the E-vector endpoint trace on the plane, which is perpendicular to the direction of light propagation. ...
... the direction axis. Cross-wave polarization in general, stands for disorder of axis-symmetry according to the spreading direction. Polarized light is divided into categories by the projection of the E-vector endpoint trace on the plane, which is perpendicular to the direction of light propagation. ...
Immersion microscopy based on photonic crystal materials
... in refs.2,3,10 . We have used a two-stage microscope design in which a magnified planar image produced originally by surface plasmon polaritons in the metal surface plane is observed with a conventional optical microscope due to SPP coupling to light via random surface roughness and nanotailored su ...
... in refs.2,3,10 . We have used a two-stage microscope design in which a magnified planar image produced originally by surface plasmon polaritons in the metal surface plane is observed with a conventional optical microscope due to SPP coupling to light via random surface roughness and nanotailored su ...
Manual for Diode Laser Spectroscopy
... Overview of the Experiments Here is a summary of the experiments covered in this manual. You may explore the properties of the diode laser and get a first qualitative picture of the absorption in the rubidium cell. You will align the laser to provide a stable beam of light, and you will observe fluo ...
... Overview of the Experiments Here is a summary of the experiments covered in this manual. You may explore the properties of the diode laser and get a first qualitative picture of the absorption in the rubidium cell. You will align the laser to provide a stable beam of light, and you will observe fluo ...
CUT OFF FREQUENCY FOR DIFFERENT MODES
... modes which are propagating, the cutoff frequency is less than V number of optical fiber and so we find it. 6. For conditions of Weakly Guided Approximation, if refractive index of core and cladding approach each other then cutoff frequency also approaches the root of Bessel functions, the three se ...
... modes which are propagating, the cutoff frequency is less than V number of optical fiber and so we find it. 6. For conditions of Weakly Guided Approximation, if refractive index of core and cladding approach each other then cutoff frequency also approaches the root of Bessel functions, the three se ...
cut off frequency for different modes - CDEEP
... As seen earlier, has to be real for a propagating mode. The frequency range over which remains real therefore is important information. It can be shown that for to be real the frequency of the wave has to be greater than certain value, called the cut-off frequency. 1. Cutoff frequency is defin ...
... As seen earlier, has to be real for a propagating mode. The frequency range over which remains real therefore is important information. It can be shown that for to be real the frequency of the wave has to be greater than certain value, called the cut-off frequency. 1. Cutoff frequency is defin ...
GaAs-based polarization modulators for microwave photonic
... losses and good linearity, in particular a higher electrooptic coefficient than semiconductor modulators (e.g., at 1.5 mm, r41≈1.5 pm/V for GaAs, r33≈30.9 pm/V for LiNbO3), LiNbO3 modulators reached the commercial availability first. On the other hand, modulators based on LiNbO3 cannot be incorporated ...
... losses and good linearity, in particular a higher electrooptic coefficient than semiconductor modulators (e.g., at 1.5 mm, r41≈1.5 pm/V for GaAs, r33≈30.9 pm/V for LiNbO3), LiNbO3 modulators reached the commercial availability first. On the other hand, modulators based on LiNbO3 cannot be incorporated ...
Poisson’s spot with molecules Please share
... of the source, i.e., the finite source size given by the 50 m-diameter source skimmer. In Fig. 4 a series of one-dimensional plots show the intensity distribution across the Poisson spot for three different distances to the circular obstacle 共distance b in Fig. 1兲. The experimental data is shown to ...
... of the source, i.e., the finite source size given by the 50 m-diameter source skimmer. In Fig. 4 a series of one-dimensional plots show the intensity distribution across the Poisson spot for three different distances to the circular obstacle 共distance b in Fig. 1兲. The experimental data is shown to ...
Resolution Power And Intensity Distribution Using Synthetic Square
... The line spread function has been solved by using the program (MathCAD) for the ideal optical system or contains focus error (W20=0.5λ,1λ,2λ) and when contains spherical aberration (W40=0.5λ,1λ) or coma aberration (W31=0.5λ) with different value of rotation angle (Ψ=0,90,180). The apertures which ta ...
... The line spread function has been solved by using the program (MathCAD) for the ideal optical system or contains focus error (W20=0.5λ,1λ,2λ) and when contains spherical aberration (W40=0.5λ,1λ) or coma aberration (W31=0.5λ) with different value of rotation angle (Ψ=0,90,180). The apertures which ta ...
Optical coherence tomography
Optical coherence tomography (OCT) is an established medical imaging technique that uses light to capture micrometer-resolution, three-dimensional images from within optical scattering media (e.g., biological tissue). Optical coherence tomography is based on low-coherence interferometry, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium. Confocal microscopy, another optical technique, typically penetrates less deeply into the sample but with higher resolution.Depending on the properties of the light source (superluminescent diodes, ultrashort pulsed lasers, and supercontinuum lasers have been employed), optical coherence tomography has achieved sub- micrometer resolution (with very wide-spectrum sources emitting over a ~100 nm wavelength range).Optical coherence tomography is one of a class of optical tomographic techniques. A relatively recent implementation of optical coherence tomography, frequency-domain optical coherence tomography, provides advantages in signal-to-noise ratio, permitting faster signal acquisition. Commercially available optical coherence tomography systems are employed in diverse applications, including art conservation and diagnostic medicine, notably in ophthalmology and optometry where it can be used to obtain detailed images from within the retina. Recently it has also begun to be used in interventional cardiology to help diagnose coronary artery disease. It has also shown promise in dermatology to improve the diagnostic process.