CARMENES in SPIE 2014. Building a fiber link for CARMENES
... Optical fibers have successfully been used to couple high-resolution spectrographs to telescopes for many years. As they allow the instrument to be placed in a stable and isolated location, they decouple the spectrograph from environmental influences. Fibers also provide a substantial increase in st ...
... Optical fibers have successfully been used to couple high-resolution spectrographs to telescopes for many years. As they allow the instrument to be placed in a stable and isolated location, they decouple the spectrograph from environmental influences. Fibers also provide a substantial increase in st ...
Topics in Adaptive Optics
... of an AO system and the required brightness of the reference sources used to measure the wavefront. The isoplanatic angle θ0 (Fried, 1982), corresponding to the field of view over which the wavefront perturbations are correlated, determines the angular distance between the corrected and the reference ...
... of an AO system and the required brightness of the reference sources used to measure the wavefront. The isoplanatic angle θ0 (Fried, 1982), corresponding to the field of view over which the wavefront perturbations are correlated, determines the angular distance between the corrected and the reference ...
Planar second-harmonic generation with noncollinear pumps in
... of quadratic media where the phase-matching conditions require either birefringence or engineered periodical poling of the nonlinear quadratic medium. The frequency-independent phase matching in the unpoled crystals is known to occur due to randomness in the size and distribution of the antiparallel ...
... of quadratic media where the phase-matching conditions require either birefringence or engineered periodical poling of the nonlinear quadratic medium. The frequency-independent phase matching in the unpoled crystals is known to occur due to randomness in the size and distribution of the antiparallel ...
Wave optical simulations of x-ray nano
... a great variety of more sophisticated and complex set-ups, including Talbot interferometry [12–16]. Also, these measurements are not limited to focusing mirrors, but can be applied to multilayer mirrors, beams filtered by x-ray waveguides, refractive lenses, multilayer Laue lenses, and to unfocused ...
... a great variety of more sophisticated and complex set-ups, including Talbot interferometry [12–16]. Also, these measurements are not limited to focusing mirrors, but can be applied to multilayer mirrors, beams filtered by x-ray waveguides, refractive lenses, multilayer Laue lenses, and to unfocused ...
Fiber Optic Switches
... Acronym. MEMS - Micro-electromechanical system Technology. MEMS are miniature devices fabricated with a process called micro machining. The structures range in dimensions from a few hundred microns to millimeters, and are mostly fabricated on silicon substrates, using standard semiconductor processi ...
... Acronym. MEMS - Micro-electromechanical system Technology. MEMS are miniature devices fabricated with a process called micro machining. The structures range in dimensions from a few hundred microns to millimeters, and are mostly fabricated on silicon substrates, using standard semiconductor processi ...
Diffuse optical imaging
... 2003; Hamaoka et al. 2007; Wolf et al. 2007). It is a valuable technique that has been used to investigate brain function and pathology in both neonates and adults (Obrig & Villringer 2003). Despite its inherent high signal contrast, one limitation of NIRS is its inability to provide spatial informa ...
... 2003; Hamaoka et al. 2007; Wolf et al. 2007). It is a valuable technique that has been used to investigate brain function and pathology in both neonates and adults (Obrig & Villringer 2003). Despite its inherent high signal contrast, one limitation of NIRS is its inability to provide spatial informa ...
PCF Based Sensor with High Sensitivity, High
... fields shown in Figure 3c,d are more confined than the electric fields shown for the PCF structures shown in Figure 3a,b when lower refractive index analyte is used. It should be mentioned that when a higher index analyte is used in the supplementary core holes, in this case this will lead to higher ...
... fields shown in Figure 3c,d are more confined than the electric fields shown for the PCF structures shown in Figure 3a,b when lower refractive index analyte is used. It should be mentioned that when a higher index analyte is used in the supplementary core holes, in this case this will lead to higher ...
Estimation of longitudinal resolution in optical coherence
... dips. Results show that, when a PSD with a spectral dip is approximated to a Gaussian PSD of the same center wavelength and bandwidth, it leads to incorrect values of coherence length obtained with either of the metrics considered. A spectral dip in a PSD introduces sidelobes in the temporal coheren ...
... dips. Results show that, when a PSD with a spectral dip is approximated to a Gaussian PSD of the same center wavelength and bandwidth, it leads to incorrect values of coherence length obtained with either of the metrics considered. A spectral dip in a PSD introduces sidelobes in the temporal coheren ...
D12 in docx
... broader Lorentzian-like absorption peak associated with the transition to the excited state (see Fig. D12.4). Slow Light: Another application of the EIT is to slow the light by a large factor. At the resonance frequency, the anomalous dispersion profile, normally observed for a two-level resonance, ...
... broader Lorentzian-like absorption peak associated with the transition to the excited state (see Fig. D12.4). Slow Light: Another application of the EIT is to slow the light by a large factor. At the resonance frequency, the anomalous dispersion profile, normally observed for a two-level resonance, ...
Gaussian Beam Optics [Hecht Ch. 13.1 pages 594
... the beam for several values of z>>zR. Then fit the data for each z using Eq. (1), which will yield values for w(z). Then one can use Eqs. (3) and (4) to determine w0 and calculate zR. ...
... the beam for several values of z>>zR. Then fit the data for each z using Eq. (1), which will yield values for w(z). Then one can use Eqs. (3) and (4) to determine w0 and calculate zR. ...
Analysis of optical interferometric displacement detection in nanoelectromechanical systems
... which passes through the center of the nanomechanical beam. This is a valid approximation if l Ⰷ 2W0. For first generation NEMS, where l is several micrometers and 2W0 ⬇ 1 m, this approximation holds well.19 This approximation is expected be less accurate for large optical spot sizes or extremely s ...
... which passes through the center of the nanomechanical beam. This is a valid approximation if l Ⰷ 2W0. For first generation NEMS, where l is several micrometers and 2W0 ⬇ 1 m, this approximation holds well.19 This approximation is expected be less accurate for large optical spot sizes or extremely s ...
Photonic Crystals - Materials Computation Center
... may present complete band gaps Photonic Band Gap (PBG) materials. ...
... may present complete band gaps Photonic Band Gap (PBG) materials. ...
Fabrication and characterization of silicone-based - lammp
... adoption of optically based clinical techniques. While liquid phantoms may be the easiest to produce and characterize, there are number of phantom applications where a solid, permanent option would be better suited. These include system reference phantoms to improve signal to noise, intersystem and ...
... adoption of optically based clinical techniques. While liquid phantoms may be the easiest to produce and characterize, there are number of phantom applications where a solid, permanent option would be better suited. These include system reference phantoms to improve signal to noise, intersystem and ...
Pulse Delay Chromatic Dispersion Measurements in Single Mode
... in the telecommunication industry but it is also an important component in the field of medicine, where it is used in laparoscopic surgery and also in laser surgery. Other uses such as the transmitting of high power laser beams and fibre optic sensors also rely on optical fibre. However nonlinear ef ...
... in the telecommunication industry but it is also an important component in the field of medicine, where it is used in laparoscopic surgery and also in laser surgery. Other uses such as the transmitting of high power laser beams and fibre optic sensors also rely on optical fibre. However nonlinear ef ...
Part 1
... can be exposed at linewidths down to 30 nm. In order to write concentric circular patterns, such as Freznel zone plates, software was developed to generate arbitrary arcs of an annulus with user-specified start and finish radii and angles. The SEBL facility also houses a Raith Turnkey 150 system as ...
... can be exposed at linewidths down to 30 nm. In order to write concentric circular patterns, such as Freznel zone plates, software was developed to generate arbitrary arcs of an annulus with user-specified start and finish radii and angles. The SEBL facility also houses a Raith Turnkey 150 system as ...
Determination of the transfer function for optical surface topography
... consists of measuring the noise and flatness of the instrument, amplification coefficients, linearity and squareness of the scales, which although common to all instrument types, do not give a complete system characterization. These parameters, for example, do not describe the response of the system ...
... consists of measuring the noise and flatness of the instrument, amplification coefficients, linearity and squareness of the scales, which although common to all instrument types, do not give a complete system characterization. These parameters, for example, do not describe the response of the system ...
Expressive Chromatic Accumulation Buffering for Defocus Blur
... A recent postprocessing approach used a simpler empirical modeling [3]. It integrates building blocks of individual optical effects together. However, such models are too simple to capture the real-world complexity. These limitations motivated us to explore better modeling and how to effectively tun ...
... A recent postprocessing approach used a simpler empirical modeling [3]. It integrates building blocks of individual optical effects together. However, such models are too simple to capture the real-world complexity. These limitations motivated us to explore better modeling and how to effectively tun ...
the Quantifying Scatter PDF
... Of course all scatter measurements are integrations over a detector collection aperture, but the TIS designation is reserved for situations where the attempt is to gather as much scattered light as possible, while “angle resolved” designs are created to gain information from the distribution of the ...
... Of course all scatter measurements are integrations over a detector collection aperture, but the TIS designation is reserved for situations where the attempt is to gather as much scattered light as possible, while “angle resolved” designs are created to gain information from the distribution of the ...
Silicon-on-Insulator Grating Duplexer for Fiber-to-the
... duplexing operation and fiber-to-chip interfacing is presented in figure 1. It consists of a one-dimensional grating structure defined on an SOI waveguide platform. The single mode optical fiber is tilted by an angle θ with respect to the vertical axis. While in standard fiber-to-waveguide grating c ...
... duplexing operation and fiber-to-chip interfacing is presented in figure 1. It consists of a one-dimensional grating structure defined on an SOI waveguide platform. The single mode optical fiber is tilted by an angle θ with respect to the vertical axis. While in standard fiber-to-waveguide grating c ...
Liquid-crystal photonic applications
... observed at temperatures below the clearing temperature for transition to the isotropic phase. In this case, the long-range orientational order dominates over thermal fluctuations and the molecules tend to align their long axes in a common direction (denoted by the director L), as shown in Fig. 2(a) ...
... observed at temperatures below the clearing temperature for transition to the isotropic phase. In this case, the long-range orientational order dominates over thermal fluctuations and the molecules tend to align their long axes in a common direction (denoted by the director L), as shown in Fig. 2(a) ...