Optical study of lead borosilicate glasses
... have greater molecular mass. The reason of density increase in those cases is related to the type of structural unites that form when Li2O is incorporated into the glass structure. Depending on the composition of Li2O–B2O3 glasses, Li2O converts symmetric BO3 triangles into BO4 tetrahedra or convert ...
... have greater molecular mass. The reason of density increase in those cases is related to the type of structural unites that form when Li2O is incorporated into the glass structure. Depending on the composition of Li2O–B2O3 glasses, Li2O converts symmetric BO3 triangles into BO4 tetrahedra or convert ...
Inverse dispersion engineering in silicon waveguides
... field normal to the interface and eT is the component of the electric field tangent to the interface in the transverse plane. It is worth remembering that the dielectric tensor is diagonal in the new local basis since the effective medium around the interface corresponds to a uniaxial anisotropic me ...
... field normal to the interface and eT is the component of the electric field tangent to the interface in the transverse plane. It is worth remembering that the dielectric tensor is diagonal in the new local basis since the effective medium around the interface corresponds to a uniaxial anisotropic me ...
Transversal ultrasonic probe
... turns out to magnify optical effects of the mechanical contact. 1. Introduction Ultrasonic testing of solid materials may require probing very small areas of a material. This can be done by coupling flat ultrasonic shear wave transducers to conical tips1. In many cases implying simultaneous detectio ...
... turns out to magnify optical effects of the mechanical contact. 1. Introduction Ultrasonic testing of solid materials may require probing very small areas of a material. This can be done by coupling flat ultrasonic shear wave transducers to conical tips1. In many cases implying simultaneous detectio ...
Holographic beam - Meadowlark Optics
... hardware, but it introduces performance tradeoffs especially for generating phase-only holograms in real time. To control hundreds of thousands of elements using a reasonable number of interconnects, data needs to be time-sequentially multiplexed into the active matrix backplane. Typically, active-m ...
... hardware, but it introduces performance tradeoffs especially for generating phase-only holograms in real time. To control hundreds of thousands of elements using a reasonable number of interconnects, data needs to be time-sequentially multiplexed into the active matrix backplane. Typically, active-m ...
Plasmonic Nanopore for Electrical Profiling of
... landscapes based on a single plasmonic nanopore. The plasmonic nanopore acts as a local light detector by converting local light intensity to heat, which, in turn, is converted to an electrical signal via the ionic conductance of the nanopore. The method is very sensitive due to the strong light abs ...
... landscapes based on a single plasmonic nanopore. The plasmonic nanopore acts as a local light detector by converting local light intensity to heat, which, in turn, is converted to an electrical signal via the ionic conductance of the nanopore. The method is very sensitive due to the strong light abs ...
Atom optics with microfabricated optical elements
... be applied to this new regime in a very straightforward way. There are however, as we will show in the following, a number of additional inherent advantages in using microoptics which signi®cantly enhance the applicability of atom optics and will lead to a range of new developments that were not ach ...
... be applied to this new regime in a very straightforward way. There are however, as we will show in the following, a number of additional inherent advantages in using microoptics which signi®cantly enhance the applicability of atom optics and will lead to a range of new developments that were not ach ...
IOSR Journal of Applied Physics (IOSR-JAP)
... Synthesis, Characterization and Optical properties of PANI/ PVA Blends. 3.3 Optical properties 3.3.1 Absorption, transmission and reflection spectra of pure PVA and PANI / PVA blend films. The UV-VIS absorbance spectra in the region 200-1100 nm for PVA and PANI/ PVA blend are shown in fig. (3-a). T ...
... Synthesis, Characterization and Optical properties of PANI/ PVA Blends. 3.3 Optical properties 3.3.1 Absorption, transmission and reflection spectra of pure PVA and PANI / PVA blend films. The UV-VIS absorbance spectra in the region 200-1100 nm for PVA and PANI/ PVA blend are shown in fig. (3-a). T ...
3-D Ultrahigh Resolution Optical Coherence Tomography with
... noninvasive optical biopsy of the human retina (D. Huang, et al, 1991). OCT is based on low coherence interferometry (R. C. Youngquist, et al, 1987), in which the pattern of interference between the reference and object beams is used to determine the amount of light reflected back from a certain poi ...
... noninvasive optical biopsy of the human retina (D. Huang, et al, 1991). OCT is based on low coherence interferometry (R. C. Youngquist, et al, 1987), in which the pattern of interference between the reference and object beams is used to determine the amount of light reflected back from a certain poi ...
Engineering nonlinearities in nanoscale optical systems
... (XPM) and cross-absorption modulation [74–77], switching via two-photon absorption (TPA) [78,79], and supercontinuum generation [80] have been demonstrated experimentally or studied theoretically. These effects can lead to important functionalities such as pulse shaping or optical switching. From t ...
... (XPM) and cross-absorption modulation [74–77], switching via two-photon absorption (TPA) [78,79], and supercontinuum generation [80] have been demonstrated experimentally or studied theoretically. These effects can lead to important functionalities such as pulse shaping or optical switching. From t ...
Lights, action: optical tweezers
... multiple objects can be held and manipulated by timesharing a single beam [7]. Multiple optical tweezers can be created in this way because viscous drag on the trapped objects is su ciently high to provide positiona l `persistence’ while the laser beam is elsewhere, servicing another object. In pra ...
... multiple objects can be held and manipulated by timesharing a single beam [7]. Multiple optical tweezers can be created in this way because viscous drag on the trapped objects is su ciently high to provide positiona l `persistence’ while the laser beam is elsewhere, servicing another object. In pra ...
Laser - nptel
... Laser beams are characterized by the following special properties : Coherence: Laser beam is highly coherent, i.e, different parts of the beam maintain a phase relationship bfor a long time. this results in interference effect. When a laser beam reflects off a surface, the reflected light can be see ...
... Laser beams are characterized by the following special properties : Coherence: Laser beam is highly coherent, i.e, different parts of the beam maintain a phase relationship bfor a long time. this results in interference effect. When a laser beam reflects off a surface, the reflected light can be see ...
Fundamentals of Free-Space Laser Communicatios
... strong local oscillator signal. The mixing process converts the weak signal to an intermediate frequency (IF) in the RF for improved detection and processing. ...
... strong local oscillator signal. The mixing process converts the weak signal to an intermediate frequency (IF) in the RF for improved detection and processing. ...
Optical device having equal length waveguide paths
... optical signals may propagate. As noted earlier, straight segments exhibit a substantially straight central axis and curved segments exhibit a central axis having a constant radius of curvature. ...
... optical signals may propagate. As noted earlier, straight segments exhibit a substantially straight central axis and curved segments exhibit a central axis having a constant radius of curvature. ...
here - Optoelectronics Research Centre
... though much finer axial resolution can be obtained when using this technology. Using a commercial supercontinuum SC450 (Fianium, UK) source, its performance in terms of its interference signal shape and its relative intensity noise (RIN) was compared with two other broadband sources, a semiconductor ...
... though much finer axial resolution can be obtained when using this technology. Using a commercial supercontinuum SC450 (Fianium, UK) source, its performance in terms of its interference signal shape and its relative intensity noise (RIN) was compared with two other broadband sources, a semiconductor ...
Laser Linewidth Characterization
... Sd(f) is the ordinary direct detection that could be measured with just a photodetector and ESA The second term – the useful heterodyne mixing product which is the convolution of the LO spectrum SLO(ν) with the signal spectrum Ss(ν) The convolution originates from the multiplication of the time-vary ...
... Sd(f) is the ordinary direct detection that could be measured with just a photodetector and ESA The second term – the useful heterodyne mixing product which is the convolution of the LO spectrum SLO(ν) with the signal spectrum Ss(ν) The convolution originates from the multiplication of the time-vary ...
Lasers-An Overview
... Lasers can be hazardous if necessary control measures are not followed. ...
... Lasers can be hazardous if necessary control measures are not followed. ...
Technical Digest Post-Deadline Papers
... difficulties for the optical system because the conventional optical pickup for the single/dual layer disc can be used without needing any changes to its basic optical structure to be applicable for the medium. Until recently, BD read-onlymemory discs of 100 and 200 GB with 4 and 8 layers, respectiv ...
... difficulties for the optical system because the conventional optical pickup for the single/dual layer disc can be used without needing any changes to its basic optical structure to be applicable for the medium. Until recently, BD read-onlymemory discs of 100 and 200 GB with 4 and 8 layers, respectiv ...
Note
... The radii of the secondary wavelets are vt , where v is the speed of light in the medium. If the medium is inhomogeneous, then some wavelets expand faster than others, and the wave profile changes. c. Huygens’ construction The new wave front is constructed by drawing circles of radius vt , each ce ...
... The radii of the secondary wavelets are vt , where v is the speed of light in the medium. If the medium is inhomogeneous, then some wavelets expand faster than others, and the wave profile changes. c. Huygens’ construction The new wave front is constructed by drawing circles of radius vt , each ce ...
\ 204 207 208 209 210 21g \ 221 /
... phenomenon involving spontaneous scattering of light in a medium due to interaction betWeen the light and sound Waves passing through the medium. [0018] Cavity or Optically Resonant Cavity refers to an optical path de?ned by tWo or more re?ecting surfaces along Which light can reciprocate or circula ...
... phenomenon involving spontaneous scattering of light in a medium due to interaction betWeen the light and sound Waves passing through the medium. [0018] Cavity or Optically Resonant Cavity refers to an optical path de?ned by tWo or more re?ecting surfaces along Which light can reciprocate or circula ...
... the electro-optic response of LiNbO3 waveguide modulators in terms of bandwidth and driving voltage. With respect to standard single-domain structures, larger bandwidths and lower driving voltages can be obtained, thus achieving figure of merits for the electro-optic response that are up to 50% larg ...
Anomalous transient amplification of waves in non
... that in most photonic applications it is difficult to implement designs in which optical loss and gain are perfectly balanced. Furthermore in a number of optical systems e.g. active plasmonic structures, the overall loss generally dominates the optical gain. For the full realization of the potential ...
... that in most photonic applications it is difficult to implement designs in which optical loss and gain are perfectly balanced. Furthermore in a number of optical systems e.g. active plasmonic structures, the overall loss generally dominates the optical gain. For the full realization of the potential ...
Analyzing optical spectra by computer simulation
... The last steps of spectrum analysis by computer simulation are the selection and adjustment of those model parameters which are to be determined by the method. Since the total fit deviation will depend on the fit parameter values in a very nonlinear and in most cases unpredictable way, there may be ...
... The last steps of spectrum analysis by computer simulation are the selection and adjustment of those model parameters which are to be determined by the method. Since the total fit deviation will depend on the fit parameter values in a very nonlinear and in most cases unpredictable way, there may be ...
Nonlinear Phase Noise in Fiber Optical Communication
... In the previous results, the best system performance is achieved by nonlinear post compensation with uniformly distributed phase 16 QAM constellation. The performance of nonlinear post compensation is further improved by optimization of 16-QAM constellation which has four shells with uniform distrib ...
... In the previous results, the best system performance is achieved by nonlinear post compensation with uniformly distributed phase 16 QAM constellation. The performance of nonlinear post compensation is further improved by optimization of 16-QAM constellation which has four shells with uniform distrib ...
Femtosecond self-guided atmospheric light strings
... singularity at small scales is not predominantly dissipative but instead is caused by a very strong defocusing lens induced by the generation of an extremely narrow plasma filament in a very narrow nonlinear focal region. Although dissipation through plasma absorption is present, it is overwhelmed b ...
... singularity at small scales is not predominantly dissipative but instead is caused by a very strong defocusing lens induced by the generation of an extremely narrow plasma filament in a very narrow nonlinear focal region. Although dissipation through plasma absorption is present, it is overwhelmed b ...
Improved Theoretical Reflectivities of Extreme Ultraviolet Mirrors
... 11-14 nm spectral range is driven by the potential of EUV projection lithography as the basis for the next generation of high throughput semiconductor lithographic tools for delineating structures at 70 nm and below [1,2]. For the EUV spectral region high reflectivity normal incidence mirrors are ne ...
... 11-14 nm spectral range is driven by the potential of EUV projection lithography as the basis for the next generation of high throughput semiconductor lithographic tools for delineating structures at 70 nm and below [1,2]. For the EUV spectral region high reflectivity normal incidence mirrors are ne ...
Fiber-optic communication
Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber. The light forms an electromagnetic carrier wave that is modulated to carry information. First developed in the 1970s, fiber-optic communication systems have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age. Because of its advantages over electrical transmission, optical fibers have largely replaced copper wire communications in core networks in the developed world. Optical fiber is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Researchers at Bell Labs have reached internet speeds of over 100 petabit×kilometer per second using fiber-optic communication.The process of communicating using fiber-optics involves the following basic steps: Creating the optical signal involving the use of a transmitter, relaying the signal along the fiber, ensuring that the signal does not become too distorted or weak, receiving the optical signal, and converting it into an electrical signal.