population inversion - Széchenyi István Egyetem
... Since the reflectors are grown upon the diode structure the resonator length is much shorter than the edge emitting lasers’ cavity (less modes) the properties of the reflectors can be monitored during the growth very good reflectance can be produced it is easier to couple the VCSEL’s light into an o ...
... Since the reflectors are grown upon the diode structure the resonator length is much shorter than the edge emitting lasers’ cavity (less modes) the properties of the reflectors can be monitored during the growth very good reflectance can be produced it is easier to couple the VCSEL’s light into an o ...
Synopsis by Lori Moore
... The degradation in the performance of an optic depends not only on the height of periodic defects, but also on the relative size of the defects. The PSD method is useful because the PSD contains information about the period of the defects on the optical surface as well as the magnitude (height) of t ...
... The degradation in the performance of an optic depends not only on the height of periodic defects, but also on the relative size of the defects. The PSD method is useful because the PSD contains information about the period of the defects on the optical surface as well as the magnitude (height) of t ...
Title of Presentation
... different TCE arranged as either differential expansion cylinders or rods, it is possible to move the compensating element directly Rods or cylinders must be of sufficient length ...
... different TCE arranged as either differential expansion cylinders or rods, it is possible to move the compensating element directly Rods or cylinders must be of sufficient length ...
Guided photoluminescence study of Nd
... PL intensity increased linearly with pump power without any saturation even at high power. The linear intensity increase of the Nd3+ guided PL under a non-resonant excitation (488 nm) confirms the efficient coupling between either Si-np and RE ions for SRSO or radiative defects and rare earth ions f ...
... PL intensity increased linearly with pump power without any saturation even at high power. The linear intensity increase of the Nd3+ guided PL under a non-resonant excitation (488 nm) confirms the efficient coupling between either Si-np and RE ions for SRSO or radiative defects and rare earth ions f ...
Adaptive optics enhanced simultaneous en-face
... volume of the sample under study. A broad band source is used for illumination, and therefore the two beams only produce an interference pattern when their optical paths differ by less than the coherence length of the source. This implies that the bandwidth of the source determines the depth resolut ...
... volume of the sample under study. A broad band source is used for illumination, and therefore the two beams only produce an interference pattern when their optical paths differ by less than the coherence length of the source. This implies that the bandwidth of the source determines the depth resolut ...
glossary - Cengage
... inconsistent changes to a database have been made. For example, an employee moves, but the address change is corrected in only one file and not across all files in the database. data cache—A shared, reserved memory area that stores the most recently accessed data blocks in RAM. Also called buffer ca ...
... inconsistent changes to a database have been made. For example, an employee moves, but the address change is corrected in only one file and not across all files in the database. data cache—A shared, reserved memory area that stores the most recently accessed data blocks in RAM. Also called buffer ca ...
2001 - Institute of Applied Physics - Friedrich-Schiller
... combining large angles of profiles and non-paraxial incident waves may lead to spherical aberrations. In this case it is necessary to use special design methods which consider these effects. We want to present a special beam shaping task for an application in safety engineering, in which beam shapin ...
... combining large angles of profiles and non-paraxial incident waves may lead to spherical aberrations. In this case it is necessary to use special design methods which consider these effects. We want to present a special beam shaping task for an application in safety engineering, in which beam shapin ...
Evolutionary optimization of layouts for high density free space
... A difficulty for the design of the EA is, that one has to make sure, that the connectors do not overlap. That has to be considered already for the random initialization of the individuals. We do the initialization in the following way: the connectors are initialized one after another and if a new init ...
... A difficulty for the design of the EA is, that one has to make sure, that the connectors do not overlap. That has to be considered already for the random initialization of the individuals. We do the initialization in the following way: the connectors are initialized one after another and if a new init ...
Optical Metrology vs SEM. Range, Accuracy, Repeatability
... and on features whose size approaches the wavelength of light being used to measure, the observed edge position of an edge depends highly on the position of nearby edges. This is why conventional metrology systems generally stop operating when the size to be measured gets to within 10% of the measur ...
... and on features whose size approaches the wavelength of light being used to measure, the observed edge position of an edge depends highly on the position of nearby edges. This is why conventional metrology systems generally stop operating when the size to be measured gets to within 10% of the measur ...
Polarimetric imaging of crystals - Werner Kaminsky
... cameras coupled to micro-computers have signaled a renaissance in the unfinished science of crystal optics. Only within the past 20 years have the tools been developed for separating the various optical effects from one another thereby maximizing the information about crystal structure and growth th ...
... cameras coupled to micro-computers have signaled a renaissance in the unfinished science of crystal optics. Only within the past 20 years have the tools been developed for separating the various optical effects from one another thereby maximizing the information about crystal structure and growth th ...
Radiative Transfer Theory - UCL Department of Geography
... Note that the single scattering albedo for leaves is not always low. This is particularly true in the near infrared. In this case, we still need to account for further orders of scattering. The iterative method used above for the microwave case is not directly appropriate, but a range of methods exi ...
... Note that the single scattering albedo for leaves is not always low. This is particularly true in the near infrared. In this case, we still need to account for further orders of scattering. The iterative method used above for the microwave case is not directly appropriate, but a range of methods exi ...
Alignment Procedures for Micro
... to the optical axis (beam) given by the assembled laser diode. The prism assembly is gripped by a vacuum gripper and placed onto the optical bench. After placing onto the optical bench, the distance of the laser diode to the edge of the first prism is measured using image processing. If the calculat ...
... to the optical axis (beam) given by the assembled laser diode. The prism assembly is gripped by a vacuum gripper and placed onto the optical bench. After placing onto the optical bench, the distance of the laser diode to the edge of the first prism is measured using image processing. If the calculat ...
Atomic Spectroscopy
... As you will recall from earlier in this discussion, absorption lines used in atomic absorption analysis are due to transitions from the ground state to a higher energy level. Atoms in the excited state are generally unstable and will rapidly revert to the ground state, losing the acquired energy in ...
... As you will recall from earlier in this discussion, absorption lines used in atomic absorption analysis are due to transitions from the ground state to a higher energy level. Atoms in the excited state are generally unstable and will rapidly revert to the ground state, losing the acquired energy in ...
absorption in ultrathin solar cells with plasmonic substrates
... Silver-coated randomly textured glass displays the broad plasmonic resonances expected from an agglomeration of silver nanoparticles of assorted size between 50–200 nm [Fig. 3(a)]. The resonances redshift from the quasistatic dipole peak for silver nanoparticles at 400 nm (3.1 eV), and broaden when ...
... Silver-coated randomly textured glass displays the broad plasmonic resonances expected from an agglomeration of silver nanoparticles of assorted size between 50–200 nm [Fig. 3(a)]. The resonances redshift from the quasistatic dipole peak for silver nanoparticles at 400 nm (3.1 eV), and broaden when ...
Upholding the diffraction limit in the focusing of light and sound
... used to confine or scatter light [5,6]. An important development occurred in the year 2000, when Pendry [7] extended the concepts of focusing using materials with negative permittivity and permeability developed by Veselago [8] to show that focusing of light to a subwavelength spot (in theory, t ...
... used to confine or scatter light [5,6]. An important development occurred in the year 2000, when Pendry [7] extended the concepts of focusing using materials with negative permittivity and permeability developed by Veselago [8] to show that focusing of light to a subwavelength spot (in theory, t ...
High-Speed Non-Volatile Optical Memory: Achievements and
... the second channel is basically unknown, non-volatile memory has to be used in the router. Routers made of electrical components are installed in modern optical networks. Routers, which can process data at speeds up to 10 GBit/s, are already commercially available. Now significant efforts are applie ...
... the second channel is basically unknown, non-volatile memory has to be used in the router. Routers made of electrical components are installed in modern optical networks. Routers, which can process data at speeds up to 10 GBit/s, are already commercially available. Now significant efforts are applie ...
Advance Program Sunday, October 12, 2014 Sunday Session
... and interleave-division multiple-access (IDMA). Results demonstrate the uplink transmission supporting more than 90 colorless ONUs at 1.25 Gb/s each over 100 km reach. MD1.3 9:15 AM - 9:30 AM Performance Upgrade of Low-Bandwidth RSOA Devices Using 4-PAM and Pre-Equalization , C. Stamatiadis, Technis ...
... and interleave-division multiple-access (IDMA). Results demonstrate the uplink transmission supporting more than 90 colorless ONUs at 1.25 Gb/s each over 100 km reach. MD1.3 9:15 AM - 9:30 AM Performance Upgrade of Low-Bandwidth RSOA Devices Using 4-PAM and Pre-Equalization , C. Stamatiadis, Technis ...
Theory of optical pulse propagation, dispersive and nonlinear effects
... In reality, the nonlinear medium is also dispersive and dispersion broadens the pulse temporally during the buildup of the nonlinear phase shift. For a positive dispersion, k2 > 0, this effect smoothens the structure in Fig. IV-37 and linearises the temporal chirp, leading thereby to a better qualit ...
... In reality, the nonlinear medium is also dispersive and dispersion broadens the pulse temporally during the buildup of the nonlinear phase shift. For a positive dispersion, k2 > 0, this effect smoothens the structure in Fig. IV-37 and linearises the temporal chirp, leading thereby to a better qualit ...
Changes in spatial extent and peak double optical density of human
... The macular pigment (MP) is a yellow pigment found in the human fovea in both the inner and outer layers of the retina, and located along the axons of the cone photoreceptors [1]. It is mainly composed of two xanthophylls, lutein and zeaxanthin [2]. MP has a peak absorption wavelength at 460 nm but ...
... The macular pigment (MP) is a yellow pigment found in the human fovea in both the inner and outer layers of the retina, and located along the axons of the cone photoreceptors [1]. It is mainly composed of two xanthophylls, lutein and zeaxanthin [2]. MP has a peak absorption wavelength at 460 nm but ...
PDF only - at www.arxiv.org.
... bandwidth, we can conveniently use dielectric gratings instead of metallic-coated ones. Dielectric gratings are important for two reasons. First, for narrow bandwidth, they have an excellent efficiency of 99%. Second, because the pulse is rather long, i.e. 20 ps, the gratings have a much higher dama ...
... bandwidth, we can conveniently use dielectric gratings instead of metallic-coated ones. Dielectric gratings are important for two reasons. First, for narrow bandwidth, they have an excellent efficiency of 99%. Second, because the pulse is rather long, i.e. 20 ps, the gratings have a much higher dama ...
OPTICAL ADD-DROP MULTIPLEXERS
... 11.2 THE OADM FUNCTION The main function of an optical multiplexer is to couple two or more wavelengths into the same fiber. If a demultiplexer is placed and properly aligned back-to-back with a multiplexer, it is clear that in the area between them, two individual wavelengths exist. ...
... 11.2 THE OADM FUNCTION The main function of an optical multiplexer is to couple two or more wavelengths into the same fiber. If a demultiplexer is placed and properly aligned back-to-back with a multiplexer, it is clear that in the area between them, two individual wavelengths exist. ...
Development of a New Optical Wavelength Rejection Filter
... techniques such as Raman spectroscopy and fluorescence measurements of weakly fluorescing samples. Unfortunately, these multiple dispersing monochromators are expensive and result in a loss of signal throughput. Typically the throughput is less than 10% for a double monochromator, even close to the ...
... techniques such as Raman spectroscopy and fluorescence measurements of weakly fluorescing samples. Unfortunately, these multiple dispersing monochromators are expensive and result in a loss of signal throughput. Typically the throughput is less than 10% for a double monochromator, even close to the ...
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"".