Development of Mirror Coatings for Gravitational Wave Detectors
... temperature dependent and, thus, cooling does not always result in a reduction in thermal noise. In particular, the mirror substrates of current detectors are made from fused silica. This material is not suitable for use at low temperature as the mechanical loss increases by approximately five order ...
... temperature dependent and, thus, cooling does not always result in a reduction in thermal noise. In particular, the mirror substrates of current detectors are made from fused silica. This material is not suitable for use at low temperature as the mechanical loss increases by approximately five order ...
Canonical and singular propagation of ultrashort pulses in a
... amounts of energy is the main reason that has led to much interest into the propagation characteristics of ultrashort pulses whose spectrum is broad, and whose widths are no more than several wavelengths of light. A second reason is that they exhibit novel singular behaviors, behaviors which are wor ...
... amounts of energy is the main reason that has led to much interest into the propagation characteristics of ultrashort pulses whose spectrum is broad, and whose widths are no more than several wavelengths of light. A second reason is that they exhibit novel singular behaviors, behaviors which are wor ...
Fabrication of two-layer integrated phase mask for
... sample is 3 microns. Due to a well known polymerization-induced phase separation process [28, 29], the laser exposed sample consists of a periodic distribution of liquid crystal-rich domains, corresponding to the dark regions of the interference pattern, and polymer-rich grating structure. Two lase ...
... sample is 3 microns. Due to a well known polymerization-induced phase separation process [28, 29], the laser exposed sample consists of a periodic distribution of liquid crystal-rich domains, corresponding to the dark regions of the interference pattern, and polymer-rich grating structure. Two lase ...
Fiber Waveguide
... Modal dispersion is much smaller in graded-index fibers than in step-index fibers since the group velocities are equalized and the differences between the delay times of the modes are reduced. It is easy to understand qualitatively. Similar to the case of step-index fibers, the path is longer for mo ...
... Modal dispersion is much smaller in graded-index fibers than in step-index fibers since the group velocities are equalized and the differences between the delay times of the modes are reduced. It is easy to understand qualitatively. Similar to the case of step-index fibers, the path is longer for mo ...
THE VARIATION O F .THE STRESS OPTICAL COEFFICIENT WITH
... has solidified, the internal strains will often cause it to become riddled with cracks and, at times, to explode into tiny fragments. This is why a glass is put into an annealing furnace just after it has solidified. ...
... has solidified, the internal strains will often cause it to become riddled with cracks and, at times, to explode into tiny fragments. This is why a glass is put into an annealing furnace just after it has solidified. ...
Imaging with Terahertz Pulses
... Spectroscopic measurements require an analysis method for THz waveforms. Typically, one measures the transmitted, timedomain waveform both with and without a sample present and then performs a Fourier deconvolution in order to extract material parameters. The success of this method requires precise ...
... Spectroscopic measurements require an analysis method for THz waveforms. Typically, one measures the transmitted, timedomain waveform both with and without a sample present and then performs a Fourier deconvolution in order to extract material parameters. The success of this method requires precise ...
Aero-Optical Environment Around a Cylindrical Turret with a Flat
... aboard an aircraft, there are two main causes of beam aberration; the turbulent air flow immediately around the aircraft (layer thickness on the same order or less of the beam aperture), coined the ``aero-optic'' problem by Gilbert [1], and the many orders of magnitude longer atmospheric-propagation ...
... aboard an aircraft, there are two main causes of beam aberration; the turbulent air flow immediately around the aircraft (layer thickness on the same order or less of the beam aperture), coined the ``aero-optic'' problem by Gilbert [1], and the many orders of magnitude longer atmospheric-propagation ...
Deep Horizontal Atmospheric Turbulence Modeling and Simulation with a Liquid
... We investigate the performance of a Liquid Crystal (LC) Spatial Light Modulator (SLM) as an optical device for generating high intensity atmospheric turbulence in the laboratory. The experimental setup represents long range horizontal beam propagation at a low altitude where the conditions of atmosp ...
... We investigate the performance of a Liquid Crystal (LC) Spatial Light Modulator (SLM) as an optical device for generating high intensity atmospheric turbulence in the laboratory. The experimental setup represents long range horizontal beam propagation at a low altitude where the conditions of atmosp ...
High frequency characterization of the Gsanger LM0202P eletro-optic [i.e. electro-optic] modulator
... determined by n and the other component moves with a velocity determined by n e This can cause the double image characteristic exhibited by ...
... determined by n and the other component moves with a velocity determined by n e This can cause the double image characteristic exhibited by ...
Get PDF - OSA Publishing
... band gap signal(FWM BGS) and fluorescence signal (FLS) under the double dressing effect in an inverted Y-type four level system. FWM BGS results from photonic band gap structure. We demonstrate that the characteristics of PTS, FWM BGS and FLS can be controlled by power, phase and the frequency detun ...
... band gap signal(FWM BGS) and fluorescence signal (FLS) under the double dressing effect in an inverted Y-type four level system. FWM BGS results from photonic band gap structure. We demonstrate that the characteristics of PTS, FWM BGS and FLS can be controlled by power, phase and the frequency detun ...
Chapter 30 . Optical Testing
... screen. Not only is this information lost, but the integration results will be false if the localized errors are large. The second important problem of the Hartmann test is that it is very time consuming, due to the time used in measuring all the data points on the Hartmann plate. These problems are ...
... screen. Not only is this information lost, but the integration results will be false if the localized errors are large. The second important problem of the Hartmann test is that it is very time consuming, due to the time used in measuring all the data points on the Hartmann plate. These problems are ...
Window strength and environments
... telescope) in which case it is called a shell. For a deep shell, it is called a dome. A window can have some effects on the image quality depending on its thickness, shape and type of incident beam (collimated, diverging or converging). The optical engineer needs to design the overall system so that ...
... telescope) in which case it is called a shell. For a deep shell, it is called a dome. A window can have some effects on the image quality depending on its thickness, shape and type of incident beam (collimated, diverging or converging). The optical engineer needs to design the overall system so that ...
Recent Advances in High-Birefringence Fiber Loop Mirror Sensors
... Photonics Crystal Fiber (PCF) is a new type of optical fiber that has emerged recently, which show very interesting guiding properties [17]. These fibers have an arrangement of microscopic air holes running along their length, and have the great advantage that by varying the size and location of the ...
... Photonics Crystal Fiber (PCF) is a new type of optical fiber that has emerged recently, which show very interesting guiding properties [17]. These fibers have an arrangement of microscopic air holes running along their length, and have the great advantage that by varying the size and location of the ...
Investigation of the Optical Properties of YAG:Ce Phosphor
... Yamada et al. in 2003 and Narendran et al. in 2005 quantified forward and backward transmitted light from a layer of YAG:Ce phosphor for an excitation radiation near 470 nm (blue) and down-converted broadband yellow light.9,11 Narendran et al. showed that more than 60% of the light propagates backwa ...
... Yamada et al. in 2003 and Narendran et al. in 2005 quantified forward and backward transmitted light from a layer of YAG:Ce phosphor for an excitation radiation near 470 nm (blue) and down-converted broadband yellow light.9,11 Narendran et al. showed that more than 60% of the light propagates backwa ...
Optically induced forces in scanning probe microscopy
... causes the attainable resolution to be limited to the order of a wavelength [5]. Higher resolution may still be achieved in several ways with methods based on far-field microscopy: for example, using a shorter wavelength, imaging in a higher refractive index medium or using structured illumination. ...
... causes the attainable resolution to be limited to the order of a wavelength [5]. Higher resolution may still be achieved in several ways with methods based on far-field microscopy: for example, using a shorter wavelength, imaging in a higher refractive index medium or using structured illumination. ...
G 3 Geochemistry Geophysics
... [3] There are some challenges to using Raman spectroscopy as an in situ technique. Until very recently, Raman systems have been so bulky and fragile that development of an in situ system could not be reasonably considered. The Raman effect is weak (only 1 in 108 photons is Raman scattered) so that t ...
... [3] There are some challenges to using Raman spectroscopy as an in situ technique. Until very recently, Raman systems have been so bulky and fragile that development of an in situ system could not be reasonably considered. The Raman effect is weak (only 1 in 108 photons is Raman scattered) so that t ...
Observation of Localized States in Lieb Photonic
... reflected on a beam splitter (BS). We obtain the output profile by using a 10× MO and a CCD camera. To study the phase structure of different profiles, we interfere the input and the output patterns with a wide-tilted plane wave. We start studying the bulk diffraction by using a B-site excitation, w ...
... reflected on a beam splitter (BS). We obtain the output profile by using a 10× MO and a CCD camera. To study the phase structure of different profiles, we interfere the input and the output patterns with a wide-tilted plane wave. We start studying the bulk diffraction by using a B-site excitation, w ...
MEMS Based Heavy Metal Detector Inas Raafat Ramsis
... plants, fish and animals and eventually accumulate in human bodies causing a variety of serious diseases. Therefore, there is an urgent need to develop a continuous, rapid, automatic, and on-site heavy metals environmental monitoring system for the online detection of heavy metals pollution at vario ...
... plants, fish and animals and eventually accumulate in human bodies causing a variety of serious diseases. Therefore, there is an urgent need to develop a continuous, rapid, automatic, and on-site heavy metals environmental monitoring system for the online detection of heavy metals pollution at vario ...
Silicon photonics
Silicon photonics is the study and application of photonic systems which use silicon as an optical medium. The silicon is usually patterned with sub-micrometre precision, into microphotonic components. These operate in the infrared, most commonly at the 1.55 micrometre wavelength used by most fiber optic telecommunication systems. The silicon typically lies on top of a layer of silica in what (by analogy with a similar construction in microelectronics) is known as silicon on insulator (SOI).Silicon photonic devices can be made using existing semiconductor fabrication techniques, and because silicon is already used as the substrate for most integrated circuits, it is possible to create hybrid devices in which the optical and electronic components are integrated onto a single microchip. Consequently, silicon photonics is being actively researched by many electronics manufacturers including IBM and Intel, as well as by academic research groups such as that of Prof. Michal Lipson, who see it is a means for keeping on track with Moore's Law, by using optical interconnects to provide faster data transfer both between and within microchips.The propagation of light through silicon devices is governed by a range of nonlinear optical phenomena including the Kerr effect, the Raman effect, two photon absorption and interactions between photons and free charge carriers. The presence of nonlinearity is of fundamental importance, as it enables light to interact with light, thus permitting applications such as wavelength conversion and all-optical signal routing, in addition to the passive transmission of light.Silicon waveguides are also of great academic interest, due to their ability to support exotic nonlinear optical phenomena such as soliton propagation.