Compact Optical Fiber Amplifier
... amplifiers, but it has the weak point that the backward Amplified Spontaneous Emission (ASE) wastes pumping power near the input terminal of the EDF, and this behavior causes a degradation of the output power of the amplifier and noise figure characteristics. Therefore, the middle isolator is used t ...
... amplifiers, but it has the weak point that the backward Amplified Spontaneous Emission (ASE) wastes pumping power near the input terminal of the EDF, and this behavior causes a degradation of the output power of the amplifier and noise figure characteristics. Therefore, the middle isolator is used t ...
Distributed Temperature Sensing Using Stimulated
... Fiber Bragg gratings (FBGs) play an important role in fiber-optic sensors [1–3]. FBG-based sensing technology is developing rapidly, and the fabrication cost of gratings can be expected to drop significantly. Thus the cost of the FBG-based distributed sensing system is mainly on the demodulation uni ...
... Fiber Bragg gratings (FBGs) play an important role in fiber-optic sensors [1–3]. FBG-based sensing technology is developing rapidly, and the fabrication cost of gratings can be expected to drop significantly. Thus the cost of the FBG-based distributed sensing system is mainly on the demodulation uni ...
The role of anterior segment optical coherence tomography in the
... The high resolution of AS-OCT is ideal for evaluating the depth of corneal injury due to a foreign body. The location of an intracorneal foreign body and the status of the surrounding ocular structure dictate the optimal surgical technique to be employed (Hersh et al. 1995). Removal of a corneal fo ...
... The high resolution of AS-OCT is ideal for evaluating the depth of corneal injury due to a foreign body. The location of an intracorneal foreign body and the status of the surrounding ocular structure dictate the optimal surgical technique to be employed (Hersh et al. 1995). Removal of a corneal fo ...
\ 204 207 208 209 210 21g \ 221 /
... emits radiation continuously rather than in short bursts, as in a pulsed laser. ...
... emits radiation continuously rather than in short bursts, as in a pulsed laser. ...
Diffraction
... bend or diffract, when they pass by a barrier or through an opening. The divergence of light from its initial line of travel is called a diffraction. Diffraction pattern PHY 1371 ...
... bend or diffract, when they pass by a barrier or through an opening. The divergence of light from its initial line of travel is called a diffraction. Diffraction pattern PHY 1371 ...
OptiSystem - cloudfront.net
... The following four examples demonstrate how to setup and measure (using OptiSystem) the receiver sensitivities of PIN and APD intensity-modulated direct-detection (IM-DD) systems, specifically: ...
... The following four examples demonstrate how to setup and measure (using OptiSystem) the receiver sensitivities of PIN and APD intensity-modulated direct-detection (IM-DD) systems, specifically: ...
Three-dimensional ray tracing on Delaunay-based
... evaluated (distance between the intersection points and refracted angle difference) from the ray tracing on the analytical (using Zemax, a commercial optical design and analysis software) and Delaunay decomposed surface with use of linear interpolation and with various sampling densities (programmed ...
... evaluated (distance between the intersection points and refracted angle difference) from the ray tracing on the analytical (using Zemax, a commercial optical design and analysis software) and Delaunay decomposed surface with use of linear interpolation and with various sampling densities (programmed ...
Three-Dimensional Mapping of Near-Field Interactions via Single-Photon Tomography Benjamin D. Mangum,
... and photon sum signals are recorded simultaneously via the AFM controller and displayed in real time. The APD signal can also be analyzed in real time using a commercial lockin amplifier (Stanford Research Systems).27,30 These real time signals are primarily used for aligning the tip and laser and t ...
... and photon sum signals are recorded simultaneously via the AFM controller and displayed in real time. The APD signal can also be analyzed in real time using a commercial lockin amplifier (Stanford Research Systems).27,30 These real time signals are primarily used for aligning the tip and laser and t ...
Optical waveguide mode control by nanoslit-enhanced
... experimentally. © 2012 Optical Society of America OCIS codes: 190.3270, 190.4360. ...
... experimentally. © 2012 Optical Society of America OCIS codes: 190.3270, 190.4360. ...
polarization 3
... So This explanation was based on the following assumptions: 1. A plane polarized light falling on an optically active medium along its optic axis splits up into two circularly polarized vibrations of equal amplitudes and rotating in opposite directions –one clockwise and other anticlockwise. 2. In ...
... So This explanation was based on the following assumptions: 1. A plane polarized light falling on an optically active medium along its optic axis splits up into two circularly polarized vibrations of equal amplitudes and rotating in opposite directions –one clockwise and other anticlockwise. 2. In ...
Fourier Optics Laboratory Manual - McGill Undergraduate Physics Lab
... image. High and low frequencies occupy different positions on the transform plane, which gives the freedom to filter out some components of an image. The origin of the transform plane, where the zero frequency can be found, is on the axis of the optical system, at the centre of the plane. This fact ...
... image. High and low frequencies occupy different positions on the transform plane, which gives the freedom to filter out some components of an image. The origin of the transform plane, where the zero frequency can be found, is on the axis of the optical system, at the centre of the plane. This fact ...
Optical Fibers
... The light source in a fiber-optic system today is laser, because the light is made up of essentially a single frequency and allows a very large in formation bandwidth. In early optoelectronic system, it was to use the GaAs-Al-GaAs system for making lasers and LEDs. These light sources are highly eff ...
... The light source in a fiber-optic system today is laser, because the light is made up of essentially a single frequency and allows a very large in formation bandwidth. In early optoelectronic system, it was to use the GaAs-Al-GaAs system for making lasers and LEDs. These light sources are highly eff ...
A short introduction to light and electron microscopy
... In wide field microscopy the whole sample is illuminated with light. Different modes of illumination can be employed. In transmission microscopy white light is transmitted through stained histological samples. Unstained samples can be analyzed using optical contrast methods (phase contrast, differen ...
... In wide field microscopy the whole sample is illuminated with light. Different modes of illumination can be employed. In transmission microscopy white light is transmitted through stained histological samples. Unstained samples can be analyzed using optical contrast methods (phase contrast, differen ...
Comparison of the sensitivity of air and dielectric
... 0.29a (dielectric mode), with slab thickness h = 0.6a. There is a line defect in the form of a W1 waveguide in the Γ-K direction. Starting from a homogeneous PCS waveguide, the DH is formed by air-hole infiltration (indicated by the dark circles in Fig. 1(b)). The aim of this selective infiltration ...
... 0.29a (dielectric mode), with slab thickness h = 0.6a. There is a line defect in the form of a W1 waveguide in the Γ-K direction. Starting from a homogeneous PCS waveguide, the DH is formed by air-hole infiltration (indicated by the dark circles in Fig. 1(b)). The aim of this selective infiltration ...
Chapter 4: Two-Beam Interference
... equally-spaced circles as a “snapshot” of a slice through a spherical wave as it propagates outward from a central point source. A slow-motion movie would show the circles slowly expanding, and a new wave emerging from the center, until the pattern looked just the same as seen one oscillation period ...
... equally-spaced circles as a “snapshot” of a slice through a spherical wave as it propagates outward from a central point source. A slow-motion movie would show the circles slowly expanding, and a new wave emerging from the center, until the pattern looked just the same as seen one oscillation period ...
Nonlinear optics in daily life
... Practical optical parametric oscillators (OPOs) have come of age with the advent of ultrashort pulses for high peak power, new and effective nonlinear crystals, and periodic poling for phase-matching. Robust, turn-key and/or computer-operated, OPO’s are now widely used for spectroscopy, as pointed o ...
... Practical optical parametric oscillators (OPOs) have come of age with the advent of ultrashort pulses for high peak power, new and effective nonlinear crystals, and periodic poling for phase-matching. Robust, turn-key and/or computer-operated, OPO’s are now widely used for spectroscopy, as pointed o ...
Bandgap-assisted surface-plasmon sensing Arnaud J. Benahmed* and Chih-Ming Ho
... and Garcia-Valenzuela [10] pointed out that these two parameters are strongly dependent on the quality of the excitation beam. Particularly, for a Gaussian beam with a small waist, 0, the slope becomes lower and the minimum of reflectivity is higher. For example, when the beam waist is 32 m at 633 ...
... and Garcia-Valenzuela [10] pointed out that these two parameters are strongly dependent on the quality of the excitation beam. Particularly, for a Gaussian beam with a small waist, 0, the slope becomes lower and the minimum of reflectivity is higher. For example, when the beam waist is 32 m at 633 ...
RS-3000 Advance / Lite
... More than 99% More than 95 to 99% More than 5 to 95% More than 1 to 5% 0 to 1% ...
... More than 99% More than 95 to 99% More than 5 to 95% More than 1 to 5% 0 to 1% ...
Correcting for miniature eye movements in high resolution scanning
... is only possible after the image distortions due to eye movements are removed. Registration of successive frames taken with a moving eye can also allow for the assembly of a larger retinal image mosaic. In its current form, the resolution of the AOSLO is about 0.5 arc minutes and can be sampled as ...
... is only possible after the image distortions due to eye movements are removed. Registration of successive frames taken with a moving eye can also allow for the assembly of a larger retinal image mosaic. In its current form, the resolution of the AOSLO is about 0.5 arc minutes and can be sampled as ...
laser arcs for astigmatic correction
... me to make tiny, nonrefractive laser marks to guide positioning of a toric IOL. I recently began using intrastromal AIs to manage postkeratoplasty astigmatism. Transplant patients who are not good candidates for penetrating incisions due to ocular surface or other corneal disease can now enjoy bette ...
... me to make tiny, nonrefractive laser marks to guide positioning of a toric IOL. I recently began using intrastromal AIs to manage postkeratoplasty astigmatism. Transplant patients who are not good candidates for penetrating incisions due to ocular surface or other corneal disease can now enjoy bette ...
Holography
... hologram worked until Leith and Upatnieks came up an optical trick: to choose one line of the mercury lamp and send it to a grating. Two different orders of the light after the grating are used as the reference and object beam, which are automatically propagating at different angles. The technique o ...
... hologram worked until Leith and Upatnieks came up an optical trick: to choose one line of the mercury lamp and send it to a grating. Two different orders of the light after the grating are used as the reference and object beam, which are automatically propagating at different angles. The technique o ...
Chapter 18 OPTICAL ELEMENTS - Doane College Physics Web
... The image in Figure 18.11b is virtual, upright, and enlarged. The image in Figure 18.11c is virtual, upright, and reduced. Although graphical methods are instructive in depicting the properties of mirrors, we can obtain algebraic relationships between the object distance p, image distance q, and foc ...
... The image in Figure 18.11b is virtual, upright, and enlarged. The image in Figure 18.11c is virtual, upright, and reduced. Although graphical methods are instructive in depicting the properties of mirrors, we can obtain algebraic relationships between the object distance p, image distance q, and foc ...
Diode Laser Characteristics
... population inversion is restricted to a narrow stripe in the active layer, so the laser’s optical gain is spatially localized (gain is the amount that an optical wave is amplified by stimulated emission as it passes through the laser cavity). The diode heterostructure also serves as an optical wavegu ...
... population inversion is restricted to a narrow stripe in the active layer, so the laser’s optical gain is spatially localized (gain is the amount that an optical wave is amplified by stimulated emission as it passes through the laser cavity). The diode heterostructure also serves as an optical wavegu ...
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.