Refractive indexes of (Al,Ga,In)As epilayers on InP for optoelectronic
... because of the relative ease in which the effective composition can be controlled. Typically, composition changes are achieved by a mathematical modeling and computer control of the MBE sources to account for the time and setpoint responses in order to achieve the desired compositional profile [6]. ...
... because of the relative ease in which the effective composition can be controlled. Typically, composition changes are achieved by a mathematical modeling and computer control of the MBE sources to account for the time and setpoint responses in order to achieve the desired compositional profile [6]. ...
SPECTRAL REFLECTANCES OF LOG ENDS FOR CAMERA BASED ANNUAL Marjanen Kalle
... σN(λ) is the standard deviation of the estimated noise. The noise can be estimated as in [18] or from the power spectrum using radial frequencies larger than 0.5 with whiteness assumption. Both methods should produce quite similar results. The second visibility function is the ratio of the estimated ...
... σN(λ) is the standard deviation of the estimated noise. The noise can be estimated as in [18] or from the power spectrum using radial frequencies larger than 0.5 with whiteness assumption. Both methods should produce quite similar results. The second visibility function is the ratio of the estimated ...
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[pdf]
... decay time of intensity fluctuations of scattered field reduced monotonously with the decrease of a number of scattering events in a medium. It has been educed also that the motionless scatterers 共that were used as a model of burned skin兲 may essentially influence the Doppler spectral bandwidth. The ...
... decay time of intensity fluctuations of scattered field reduced monotonously with the decrease of a number of scattering events in a medium. It has been educed also that the motionless scatterers 共that were used as a model of burned skin兲 may essentially influence the Doppler spectral bandwidth. The ...
Spectral domain optical coherence tomography imaging of
... ecdysis. The substrate was changed to newspaper immediately prior to shedding of head scales to facilitate retrieval of shed material. The room was kept at 29.4 °C, with the terrarium space beneath the heat lamps at 32 °C. Humidity within the room was maintained at approximately 50%. All procedures ...
... ecdysis. The substrate was changed to newspaper immediately prior to shedding of head scales to facilitate retrieval of shed material. The room was kept at 29.4 °C, with the terrarium space beneath the heat lamps at 32 °C. Humidity within the room was maintained at approximately 50%. All procedures ...
D12 in docx
... electron-beam lithography plus stacking of several layers on the one hand (KIT and Bilkent) and inherently three-dimensional direct-laser-writing (DLW) optical lithography on the other hand (KIT). The previous status has been reported on in D10, which shall not be repeated here. Meanwhile it has bec ...
... electron-beam lithography plus stacking of several layers on the one hand (KIT and Bilkent) and inherently three-dimensional direct-laser-writing (DLW) optical lithography on the other hand (KIT). The previous status has been reported on in D10, which shall not be repeated here. Meanwhile it has bec ...
Light amplificated by stimulated emission of radiation
... Bulk-optical resonators are used e.g. for solid-state bulk lasers. The transverse mode properties depend on the overall setup (including the length of air spaces), and mode sizes can vary significantly along the resonator. In some cases, the mode properties are also significantly influenced by effec ...
... Bulk-optical resonators are used e.g. for solid-state bulk lasers. The transverse mode properties depend on the overall setup (including the length of air spaces), and mode sizes can vary significantly along the resonator. In some cases, the mode properties are also significantly influenced by effec ...
MICROWAVE NOISE FIELD BEHAVES LIKE WHITE LIGHT J
... and c = 3.108 m/s is the speed of light. Taking the wavelength of a typical microwave 0.1 m, with the other constants, we can see how weak the microwave photons are: e = 20 · 10−26 J. A pair of electromagnetic waves or signals can interfere if both the elements have components of equal frequency. Th ...
... and c = 3.108 m/s is the speed of light. Taking the wavelength of a typical microwave 0.1 m, with the other constants, we can see how weak the microwave photons are: e = 20 · 10−26 J. A pair of electromagnetic waves or signals can interfere if both the elements have components of equal frequency. Th ...
Influence of optical forces on nonlinear optical frequency conversion
... The phase-matching wavelength shifts with the input light power. Our simulation shows that the third harmonic phase-matching wavelength shifts 90 nm (3.6 nm/mW) along the waveguides, when the power increases to 25 mW with a waveguide length of 100 μm and an initial gap of 150 nm respectively. Moreov ...
... The phase-matching wavelength shifts with the input light power. Our simulation shows that the third harmonic phase-matching wavelength shifts 90 nm (3.6 nm/mW) along the waveguides, when the power increases to 25 mW with a waveguide length of 100 μm and an initial gap of 150 nm respectively. Moreov ...
Self-calibrated Microwave Characterization of High
... component analyzer (LCA) [9]. The VNA-based method requires a wideband calibrated PD to characterize a LD or a MOD under test, or a wideband calibrated MZM to characterize a PD under test, and so it relies on de-embedding the assistant PD or MOD, since the measured total frequency response depends o ...
... component analyzer (LCA) [9]. The VNA-based method requires a wideband calibrated PD to characterize a LD or a MOD under test, or a wideband calibrated MZM to characterize a PD under test, and so it relies on de-embedding the assistant PD or MOD, since the measured total frequency response depends o ...
K. S. Al Mugren, Y. El Sayed, H. Shoukry, A. El Taher
... X-ray diffraction spectroscopy has been performed by using, (Schimadzu Labx XRD6000) using CuK radiation at 40 kV,2θ between 5 to 90°. The calorimetric measurements of prepared glasses were carried out in Setaram (DSC 131 Evo). Temperature and energy calibrations of the instrument were performed us ...
... X-ray diffraction spectroscopy has been performed by using, (Schimadzu Labx XRD6000) using CuK radiation at 40 kV,2θ between 5 to 90°. The calorimetric measurements of prepared glasses were carried out in Setaram (DSC 131 Evo). Temperature and energy calibrations of the instrument were performed us ...
Lasers incorporating 2D photonic bandgap mirrors
... that the A10, mask layer stands up well under CAIBE and thus holes as deep as 3 p are attainable. However, as the holes become deeper, the effects of changes in the substrate temperature result in narrowing or undercutting of the mask. To prevent thermal drift, a water cooled stage was used in the C ...
... that the A10, mask layer stands up well under CAIBE and thus holes as deep as 3 p are attainable. However, as the holes become deeper, the effects of changes in the substrate temperature result in narrowing or undercutting of the mask. To prevent thermal drift, a water cooled stage was used in the C ...
Manganese-Enhanced MRI for Preclinical Evaluation of Retinal
... vivo. In MEMRI, paramagnetic Mn2þ ions are used as T1 contrast agents to image the activity of Ca2þ channels.11,12 In excitable cells, such as neurons and cardiac cells, Mn2þ has been shown to be taken up by active calcium signaling pathways, including voltage-gated channels. Mn2þ then is retained i ...
... vivo. In MEMRI, paramagnetic Mn2þ ions are used as T1 contrast agents to image the activity of Ca2þ channels.11,12 In excitable cells, such as neurons and cardiac cells, Mn2þ has been shown to be taken up by active calcium signaling pathways, including voltage-gated channels. Mn2þ then is retained i ...
Optical Instruments
... The prism is placed on the table and the approximate position for minimum deviation is observed through the telescope. The telescope is rotated for a position making an angle more than the minimum deviation. In this position of the telescope, there will be two positions of the prism when the image o ...
... The prism is placed on the table and the approximate position for minimum deviation is observed through the telescope. The telescope is rotated for a position making an angle more than the minimum deviation. In this position of the telescope, there will be two positions of the prism when the image o ...
Direct Laser Writing: Versatile Tool for Microfabrication of Lithium
... photosensitive near the 600-650nm wavelength due to iron dopants, are completely transparent, and photoexcitation requires non-linear absorption. The laser beam was attenuated by a variable attenuator (not shown) and focused into the bulk of sample by a microscope objective lens. Lenses having vario ...
... photosensitive near the 600-650nm wavelength due to iron dopants, are completely transparent, and photoexcitation requires non-linear absorption. The laser beam was attenuated by a variable attenuator (not shown) and focused into the bulk of sample by a microscope objective lens. Lenses having vario ...
High accurate metrology on large surface areas with low reflectivity
... after the surface finish. In many cases the process efficiency and quality can be improved if a surface area is measured at an earlier stage in the process. However, in a non-finished surface condition the interferometer does not fulfill this requirement. To overcome this drawback a different measur ...
... after the surface finish. In many cases the process efficiency and quality can be improved if a surface area is measured at an earlier stage in the process. However, in a non-finished surface condition the interferometer does not fulfill this requirement. To overcome this drawback a different measur ...
Wavelength Division Multiplexing of a Fibre
... through the FBG was directd through the DWDM, with the output of the relevant channel (31) going to the first input on the TRDS. The signal reflected from the FBG, was then directed to the second DWDM filter via a circulator. Again the output from channel 31 was used, and connected to the second inp ...
... through the FBG was directd through the DWDM, with the output of the relevant channel (31) going to the first input on the TRDS. The signal reflected from the FBG, was then directed to the second DWDM filter via a circulator. Again the output from channel 31 was used, and connected to the second inp ...
Lecture 04
... diaphragm in the base normally controls the size of the illuminated field and is therefore called “luminous field diaphragm”, in our setup this diaphragm acts as “aperture diaphragm”, since there is no condenser used. It serves as our “point source”, creating coherent, essentially parallel wave fron ...
... diaphragm in the base normally controls the size of the illuminated field and is therefore called “luminous field diaphragm”, in our setup this diaphragm acts as “aperture diaphragm”, since there is no condenser used. It serves as our “point source”, creating coherent, essentially parallel wave fron ...
Selective plane illumination microscopy techniques in
... in Box 1) to illuminate the specimen from the side. Techniques like SPIM, generally called light-sheet microscopy methods, are becoming increasingly popular because they achieve excellent resolution at high penetration depths (see Glossary in Box 1) while being minimally invasive at the same time (e ...
... in Box 1) to illuminate the specimen from the side. Techniques like SPIM, generally called light-sheet microscopy methods, are becoming increasingly popular because they achieve excellent resolution at high penetration depths (see Glossary in Box 1) while being minimally invasive at the same time (e ...
Scanning Computerized Ophthalmic Diagnostic Imaging
... Coverage Indications, Limitations, and/or Medical Necessity Many forms of scanning computerized ophthalmic diagnostic imaging (SCODI)tests currently exist (e.g., confocal laser scanning ophthalmoscopy (topography), scanning laser polarimetry, optical coherence tomography (OCT), and retinal thickness ...
... Coverage Indications, Limitations, and/or Medical Necessity Many forms of scanning computerized ophthalmic diagnostic imaging (SCODI)tests currently exist (e.g., confocal laser scanning ophthalmoscopy (topography), scanning laser polarimetry, optical coherence tomography (OCT), and retinal thickness ...
DOWNLOAD Lesson 201 Handout
... The form of electromagnetic radiation your eyes can detect is called ``visible'' or ``optical''. Astronomers have only recently (within the past few decades) been able to use the other forms of electromagnetic radiation or light. Every time technology has been developed to detect another form of lig ...
... The form of electromagnetic radiation your eyes can detect is called ``visible'' or ``optical''. Astronomers have only recently (within the past few decades) been able to use the other forms of electromagnetic radiation or light. Every time technology has been developed to detect another form of lig ...
may11-96 as a Word 6.0 doc - Lyle School of Engineering
... Read the following notes before starting the exam: Note #1: the first 33 questions are worth 3 points and worth 1 point. Note #2: Some of the multiple choice questions may have more than one correct answer listed. If so, circle all of the correct responses for the question. Note #3: Please print you ...
... Read the following notes before starting the exam: Note #1: the first 33 questions are worth 3 points and worth 1 point. Note #2: Some of the multiple choice questions may have more than one correct answer listed. If so, circle all of the correct responses for the question. Note #3: Please print you ...
Manuscript2 - Open Research Exeter
... higher the concentration ratio of a solar concentrator system, the more dependent upon accuracy it becomes. This includes manufacturing accuracy and solar tracking accuracy. The relationship between concentration ratio and acceptance angle directly follows from etendue and is explained further by Je ...
... higher the concentration ratio of a solar concentrator system, the more dependent upon accuracy it becomes. This includes manufacturing accuracy and solar tracking accuracy. The relationship between concentration ratio and acceptance angle directly follows from etendue and is explained further by Je ...
Experimental demonstration of a light-ray-direction
... Optical components on a scale much greater than the optical wavelength, for example prisms, may also be joined together in a periodic structure [6]. These so-called METATOYs [7] can partially mimic the ray optics of metamaterials, as expressed in the acronym METATOY, which stands for metamaterial fo ...
... Optical components on a scale much greater than the optical wavelength, for example prisms, may also be joined together in a periodic structure [6]. These so-called METATOYs [7] can partially mimic the ray optics of metamaterials, as expressed in the acronym METATOY, which stands for metamaterial fo ...
PDF
... The devices were characterized using two techniques: fiber-to-fiber optical power measurements to determine the optical power in the ridge waveguide and high resolution thermal imaging of the metallized ridge to measure optical power in the SPP mode. For fiber-to-fiber measurements, the input light ...
... The devices were characterized using two techniques: fiber-to-fiber optical power measurements to determine the optical power in the ridge waveguide and high resolution thermal imaging of the metallized ridge to measure optical power in the SPP mode. For fiber-to-fiber measurements, the input light ...
Diffraction-managed superlensing using metallodielectric heterostructures
... on the contrary, the magnetic field at the output plane resembles that at the input plane. In Fig. 5(b) we show the wave field for a slit aperture of 200 nm. In this case, the beam width that is excited by the plasmonic slit is conserved not only at the exit but all along the periodic media. This cana ...
... on the contrary, the magnetic field at the output plane resembles that at the input plane. In Fig. 5(b) we show the wave field for a slit aperture of 200 nm. In this case, the beam width that is excited by the plasmonic slit is conserved not only at the exit but all along the periodic media. This cana ...
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.