Biomedical Optical Imaging
... alignment and are bulky. Since swept source OCT uses photo detectors rather than a spectrometer, it can be more compact and have higher sensitivity than spectral / Fourier domain OCT. Since imaging speeds are limited by sensitivity, swept source OCT could ultimately image faster than spectral / Four ...
... alignment and are bulky. Since swept source OCT uses photo detectors rather than a spectrometer, it can be more compact and have higher sensitivity than spectral / Fourier domain OCT. Since imaging speeds are limited by sensitivity, swept source OCT could ultimately image faster than spectral / Four ...
Statistics of the received power for free space optical channels
... due to atmospheric turbulence induced spatial and temporal irradiance fluctuations (scintillation) in the laser wavefront. In addition, turbulence can cause the laser beam centroid to wander resulting in power fading, and sometimes complete loss of the signal. Spreading of the laser beam and jitter ...
... due to atmospheric turbulence induced spatial and temporal irradiance fluctuations (scintillation) in the laser wavefront. In addition, turbulence can cause the laser beam centroid to wander resulting in power fading, and sometimes complete loss of the signal. Spreading of the laser beam and jitter ...
15. Atmospheric Channel Effects and the Impact on
... 19 km. The influence of the atmosphere on an optical link from a HAP at 20 km height to a satellite is therefore much smaller than it is for a link from ground station to satellite. Fading: Variations of the received signal intensity due to interferometric effects and beam wander are usually called ...
... 19 km. The influence of the atmosphere on an optical link from a HAP at 20 km height to a satellite is therefore much smaller than it is for a link from ground station to satellite. Fading: Variations of the received signal intensity due to interferometric effects and beam wander are usually called ...
Composite optical vortices - RIT Center for Imaging Science
... carries orbital angular momentum.12 In general, when one beam is superimposed with another, the phase of the composite field differs from that of the component beams. Being a topological phase structure, an optical vortex is readily affected when it is combined with other fields. The new or ‘‘compos ...
... carries orbital angular momentum.12 In general, when one beam is superimposed with another, the phase of the composite field differs from that of the component beams. Being a topological phase structure, an optical vortex is readily affected when it is combined with other fields. The new or ‘‘compos ...
The measurement of rough surface topography using coherence
... (commonly referred to as vertical scanning white light interferometry). This guide is aimed at users of coherence scanning interferometry for the optical measurement of surface texture within production and research environments. The general guidelines described herein can be applied to the measurem ...
... (commonly referred to as vertical scanning white light interferometry). This guide is aimed at users of coherence scanning interferometry for the optical measurement of surface texture within production and research environments. The general guidelines described herein can be applied to the measurem ...
Introduction to super-resolution microscopy
... equipped with a high power excitation source can realize super-resolution imaging. This switching-free approach has also been demonstrated by using fluorophores where the lifetime of the non-fluorescent state was lengthened by reduction in the triplet state to a radical anion [11]. The shift of the em ...
... equipped with a high power excitation source can realize super-resolution imaging. This switching-free approach has also been demonstrated by using fluorophores where the lifetime of the non-fluorescent state was lengthened by reduction in the triplet state to a radical anion [11]. The shift of the em ...
Gradient Index Optics at DARPA - Institute for Defense Analyses
... Laboratory (NRL) collaborated on the nanolayer lens effort to create a synthetic lens that would mimic the structure and capabilities of an octopus eye. The CWRU/NRL team used a forced assembly nanolayer coextrusion process to form films that had a tailored refractive index consisting of thousands o ...
... Laboratory (NRL) collaborated on the nanolayer lens effort to create a synthetic lens that would mimic the structure and capabilities of an octopus eye. The CWRU/NRL team used a forced assembly nanolayer coextrusion process to form films that had a tailored refractive index consisting of thousands o ...
Microscopy - PSSurvival.com
... Growth of protein crystals results in both protein and salt crystals. Both are colorless and microscopic. Recovery of the protein crystals requires imaging which can be done by the intrinsic fluorescence of the protein or by using transmission microscopy. Both methods require an ultraviolet microsco ...
... Growth of protein crystals results in both protein and salt crystals. Both are colorless and microscopic. Recovery of the protein crystals requires imaging which can be done by the intrinsic fluorescence of the protein or by using transmission microscopy. Both methods require an ultraviolet microsco ...
technical paper
... on total internal reflectance. In addition to waveguides, dense wavelength division multiplexing (DWDM) filters reflect over very narrow wavelength bands and are used to separate optical signals in telecommunication fiber optics. The list goes on…. In addition to improving performance and adding col ...
... on total internal reflectance. In addition to waveguides, dense wavelength division multiplexing (DWDM) filters reflect over very narrow wavelength bands and are used to separate optical signals in telecommunication fiber optics. The list goes on…. In addition to improving performance and adding col ...
NGAO NGS WFS design review - Caltech Optical Observatories
... NGAO WFS design, Caltech Optical Observatories ...
... NGAO WFS design, Caltech Optical Observatories ...
UNIT-4 OCN
... • After the initial measurement of output pulse width, the long fiber length may be cut back to a short length and the measurement repeated in order to obtain the effective input pulse width. • The fiber is generally cut back to the lesser of 10 m or 1% of its original length. • As an alternative t ...
... • After the initial measurement of output pulse width, the long fiber length may be cut back to a short length and the measurement repeated in order to obtain the effective input pulse width. • The fiber is generally cut back to the lesser of 10 m or 1% of its original length. • As an alternative t ...
High-Temperature Operation of Terahertz Quantum Cascade Laser
... rials or photoconductive switches), has a demonstrated potential in some of these areas [1], [2]. However, further development of THz systems will require compact semiconductor-based sources: there currently exist no room temperature, high-power, widely tunable THz sources that are suitable for prod ...
... rials or photoconductive switches), has a demonstrated potential in some of these areas [1], [2]. However, further development of THz systems will require compact semiconductor-based sources: there currently exist no room temperature, high-power, widely tunable THz sources that are suitable for prod ...
A mobile, high-precision atom-interferometer and its
... (GAIN) project has been started to meet this requirement and to provide best possible accuracy at the same time. It aims to realize an alternative to other types of gravimeters and to combine important qualities such as high sensitivity and absolute accuracy in one instrument. The GAIN sensor is bas ...
... (GAIN) project has been started to meet this requirement and to provide best possible accuracy at the same time. It aims to realize an alternative to other types of gravimeters and to combine important qualities such as high sensitivity and absolute accuracy in one instrument. The GAIN sensor is bas ...
Nonlinear Optical Phenomena and Materials
... the nonlinear susceptibi lity was related to the third power of the linear susceptibility by a factor now known as Miller's delta. Whereas nonlinear coefficients of materials span over four orders of magnitude, Miller's delta is constant to within 50%. To the crystal grower and nonlinear materials s ...
... the nonlinear susceptibi lity was related to the third power of the linear susceptibility by a factor now known as Miller's delta. Whereas nonlinear coefficients of materials span over four orders of magnitude, Miller's delta is constant to within 50%. To the crystal grower and nonlinear materials s ...
The Strontium Optical Lattice Clock
... is atomic frequency standards and clocks. Atomic clocks find significant roles in a number of scientific and technological settings. State-of-the-art, laser-cooled, Cs-fountain microwave clocks have demonstrated impressive frequency measurement accuracy, with fractional uncertainties below the 10−15 ...
... is atomic frequency standards and clocks. Atomic clocks find significant roles in a number of scientific and technological settings. State-of-the-art, laser-cooled, Cs-fountain microwave clocks have demonstrated impressive frequency measurement accuracy, with fractional uncertainties below the 10−15 ...
A study on optical absorption and constants of doped poly(ethylene
... their properties is extremely important not only for scientific knowledge but also for modern and advanced technological applications. Most polymeric materials are poor conductors of electricity because of the unavailability of large number of free electrons or ions to participate in the conduction p ...
... their properties is extremely important not only for scientific knowledge but also for modern and advanced technological applications. Most polymeric materials are poor conductors of electricity because of the unavailability of large number of free electrons or ions to participate in the conduction p ...
SAP BusinessObjects Business Intelligence with SAP
... without any SAP application and who are looking for a data mart solution to address the need for realtime insight into their business. As this relatively young technology matures development efforts are becoming focused on supporting more and more processes and applications. Also integrating semi-st ...
... without any SAP application and who are looking for a data mart solution to address the need for realtime insight into their business. As this relatively young technology matures development efforts are becoming focused on supporting more and more processes and applications. Also integrating semi-st ...
Resolution enhancement techniques in microscopy
... medicine, microscopy is widely regarded an important discovery: advances in optical microscopy correlate well with advances in our understanding of biology, and medicine [Masters 2008; 2009a; 2009b]. Schellenberg edited a book with reprinted papers on the history of optical resolution and its applic ...
... medicine, microscopy is widely regarded an important discovery: advances in optical microscopy correlate well with advances in our understanding of biology, and medicine [Masters 2008; 2009a; 2009b]. Schellenberg edited a book with reprinted papers on the history of optical resolution and its applic ...
Lithium Niobate Microphotonic Modulators
... you’ve had both on this work, and on my life. Especially Sumesh, whose technical impact on this work is immeasurable, and whose emotional support given to me over the years is incalculable. ...
... you’ve had both on this work, and on my life. Especially Sumesh, whose technical impact on this work is immeasurable, and whose emotional support given to me over the years is incalculable. ...
Gaussian Beam Optics [Hecht Ch. 13.1 pages 594
... beams are asymmetric and often astigmatic, which causes their transformation to be more complex. Although in some respects component design and tolerancing for lasers is more critical than for conventional optical components, the designs often tend to be simpler since many of the constraints associa ...
... beams are asymmetric and often astigmatic, which causes their transformation to be more complex. Although in some respects component design and tolerancing for lasers is more critical than for conventional optical components, the designs often tend to be simpler since many of the constraints associa ...
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"".