Passive intrinsic-linewidth narrowing of ultraviolet extended-cavity diode laser by weak optical feedback
... stabilization to a high-finesse, ultrastable vertical cavity [10, 11], or an all-fiber Michelson interferometer [12], have also achieved hertz-level linewidth. However, due to finite bandwidth for electrical feedback to the diode current, the high-frequency noise is usually not substantially reduced ...
... stabilization to a high-finesse, ultrastable vertical cavity [10, 11], or an all-fiber Michelson interferometer [12], have also achieved hertz-level linewidth. However, due to finite bandwidth for electrical feedback to the diode current, the high-frequency noise is usually not substantially reduced ...
Suppression of Stimulated Brillouin Scattering
... the peaks may be precisely aligned or misaligned to produce high reflectivity and high sidemode suppression ratio at the desired wavelength. This tuning mechanism is used to select a particular cavity mode. By injecting current into the phase section, the position of the cavity modes may be precisel ...
... the peaks may be precisely aligned or misaligned to produce high reflectivity and high sidemode suppression ratio at the desired wavelength. This tuning mechanism is used to select a particular cavity mode. By injecting current into the phase section, the position of the cavity modes may be precisel ...
Gauthier Abstracts - Department of Electronics
... We present a dual beam multiple exposure technique that can generate complex 2D quasi-crystal template structures. The optical system is based on the interference of two laser beams producing a family of high intensity planes. Controlled reorientation of a photosensitive sample between exposures re ...
... We present a dual beam multiple exposure technique that can generate complex 2D quasi-crystal template structures. The optical system is based on the interference of two laser beams producing a family of high intensity planes. Controlled reorientation of a photosensitive sample between exposures re ...
High-Speed Interferometric Detection of Label-Free Immunoassays on the Biological Compact Disc Ming Zhao,
... average over the entire set of spots on the disc. Also included is a smooth fit to a stretched response function modeled by an exponential distribution of ka values for the bound antigen vs free antibody reaction. The wide distribution of ka is consistent with protein denaturation on immobilization. ...
... average over the entire set of spots on the disc. Also included is a smooth fit to a stretched response function modeled by an exponential distribution of ka values for the bound antigen vs free antibody reaction. The wide distribution of ka is consistent with protein denaturation on immobilization. ...
"A MAP equalizer for the optical communications channel"
... MSE as they directly minimize the errors in a symbol or sequence. Current implementations of MLSE for optical channels [3]–[7], however, rely on generating lookup tables through histograms, a very challenging task at very low bit error rates (BERs) of 10−8 or less at which optical communications sys ...
... MSE as they directly minimize the errors in a symbol or sequence. Current implementations of MLSE for optical channels [3]–[7], however, rely on generating lookup tables through histograms, a very challenging task at very low bit error rates (BERs) of 10−8 or less at which optical communications sys ...
Size Estimation of Protein Clusters in the Nanometer Range by
... the excitation and the detection PSF of the SMI-microscope are generated from the hardware parameters (e.g. excitation wavelength, numerical aperture, magnification). With the generated microscope PSFs, the intensity distributions as detected in the SMI-microscope are calculated for various differen ...
... the excitation and the detection PSF of the SMI-microscope are generated from the hardware parameters (e.g. excitation wavelength, numerical aperture, magnification). With the generated microscope PSFs, the intensity distributions as detected in the SMI-microscope are calculated for various differen ...
Highly efficient all-fiber tunable polarization filter
... (AO) devices are based on wavelength selective AO coupling between several spatial modes of light propagating in an optical fibers using traveling flexural acoustic wave. On the other hand, it has also been known that AO coupling between two optical polarization modes in a highly birefringent (HB) ...
... (AO) devices are based on wavelength selective AO coupling between several spatial modes of light propagating in an optical fibers using traveling flexural acoustic wave. On the other hand, it has also been known that AO coupling between two optical polarization modes in a highly birefringent (HB) ...
Broad Band Two-Dimensional Manipulation of Surface Plasmons
... shape of either a slit or single edge to control the SPP interference patterns on a metallic surface. We would like to start with a simplest situationsSPP interference between two antipropagating SPP waves. As an example, the simulated total electrical field distribution at the cross section of an i ...
... shape of either a slit or single edge to control the SPP interference patterns on a metallic surface. We would like to start with a simplest situationsSPP interference between two antipropagating SPP waves. As an example, the simulated total electrical field distribution at the cross section of an i ...
Nonlinear optical properties of aromatic amino acids in the
... pure water. The solid curves are the theoretical fitting for the far-field condition described by Eq. (1). The focus intensity used for this case was Io = 18 GW/ cm2. To measure the solutions’ nonlinear absorption coefficients, an intensity of one order of magnitude higher than previously, Io = 180 ...
... pure water. The solid curves are the theoretical fitting for the far-field condition described by Eq. (1). The focus intensity used for this case was Io = 18 GW/ cm2. To measure the solutions’ nonlinear absorption coefficients, an intensity of one order of magnitude higher than previously, Io = 180 ...
Julie Cass - Stanford University
... mechanism capable of probing pulses shorter than 10 fs, a scale too small to be resolved by existing time domain detectors. Scientists at the LCLS have developed an alternative design implementing a broadband infrared prism spectrometer to probe for this parameter in the frequency domain. ...
... mechanism capable of probing pulses shorter than 10 fs, a scale too small to be resolved by existing time domain detectors. Scientists at the LCLS have developed an alternative design implementing a broadband infrared prism spectrometer to probe for this parameter in the frequency domain. ...
Studentthesis-2013 - Aston Research Explorer
... Thesis Summary The principle theme of this thesis is the advancement and expansion of ophthalmic research via the collaboration between professional Engineers and professional Optometrists. The aim has been to develop new and novel approaches and solutions to contemporary problems in the field. The ...
... Thesis Summary The principle theme of this thesis is the advancement and expansion of ophthalmic research via the collaboration between professional Engineers and professional Optometrists. The aim has been to develop new and novel approaches and solutions to contemporary problems in the field. The ...
Optical interconnection technology in switches, routers, and optical
... with a single electrical true crossbar are therefore limited to small or medium-sized systems. A 140 140 3.2 Gbit/s single-chip switch is commercially available [17]. In multistage shuffle-exchange networks, the cost function is reduced to N log2 N, but here log2 N stages must be traversed to re ...
... with a single electrical true crossbar are therefore limited to small or medium-sized systems. A 140 140 3.2 Gbit/s single-chip switch is commercially available [17]. In multistage shuffle-exchange networks, the cost function is reduced to N log2 N, but here log2 N stages must be traversed to re ...
prezantacia aj
... The part of an optical fiber through which light rays travel is called the core of the fiber. Light rays can only enter the core if their angle is inside the numerical aperture of the fiber. Likewise, once the rays have entered the core of the fiber, there are a limited number of optical paths that ...
... The part of an optical fiber through which light rays travel is called the core of the fiber. Light rays can only enter the core if their angle is inside the numerical aperture of the fiber. Likewise, once the rays have entered the core of the fiber, there are a limited number of optical paths that ...
Proximity Detection IR LED and Optical Crosstalk
... replacement, interaction between several adjacent parts becomes important to understand. Types of IR LEDs There are many types of IR LEDs that can be used in a proximity system. Some LEDs come without lenses in a flat clear package similar to our proximity sensor. These IR LEDs possess a very wide d ...
... replacement, interaction between several adjacent parts becomes important to understand. Types of IR LEDs There are many types of IR LEDs that can be used in a proximity system. Some LEDs come without lenses in a flat clear package similar to our proximity sensor. These IR LEDs possess a very wide d ...
Dynamic lighting system for specular surface inspection
... Defects appear as high gray level pixels. In order to perform a simple segmentation processing, we have to obtain a mean image with defects very contrasted with regard to the flawless area of the surface by imaging a minimum of necessary images. The contrast between the defects zones and the rest of ...
... Defects appear as high gray level pixels. In order to perform a simple segmentation processing, we have to obtain a mean image with defects very contrasted with regard to the flawless area of the surface by imaging a minimum of necessary images. The contrast between the defects zones and the rest of ...
Etching of Niobium Sample Placed on Superconducting Radio
... cavity are presented. It has been proven with flat samples that the bulk Niobium (Nb) removal rate and the surface roughness after plasma etchings are equal to or better than wet etching processes. The plasma properties inside the single cell SRF cavity depend significantly on frequency, pressure an ...
... cavity are presented. It has been proven with flat samples that the bulk Niobium (Nb) removal rate and the surface roughness after plasma etchings are equal to or better than wet etching processes. The plasma properties inside the single cell SRF cavity depend significantly on frequency, pressure an ...
Design and Fabrication of Tb -Doped Silicon Oxy
... N recent years, planar microresonators have attracted a particular attention as a key component for integrated, ‘lab-on-a-chip’ biosensors [1], [2]. Adsorption of biomaterial changes the effective refractive index of the resonator and thus its resonance positions, which then can be used as an indica ...
... N recent years, planar microresonators have attracted a particular attention as a key component for integrated, ‘lab-on-a-chip’ biosensors [1], [2]. Adsorption of biomaterial changes the effective refractive index of the resonator and thus its resonance positions, which then can be used as an indica ...
HOLOGRAPHY, 1948-1971
... optical experiments. Figure 4 shows one of our first holographic reconstructions. The experiments were not easy. The best compromise between coherence and intensity was offered by the high pressure mercury lamp, which had a coherence length of only 0.1 mm, enough for about 200 fringes. But in order ...
... optical experiments. Figure 4 shows one of our first holographic reconstructions. The experiments were not easy. The best compromise between coherence and intensity was offered by the high pressure mercury lamp, which had a coherence length of only 0.1 mm, enough for about 200 fringes. But in order ...
Blue light hazard
... Inflammatory response of the cornea and conjunctiva following exposure to ultraviolet (UV) radiation. Wavelengths shorter than 320 nm are most effective in causing this condition. The peak of the action spectrum is approximately at 270 nm. Note: Different action spectra have been published for photo ...
... Inflammatory response of the cornea and conjunctiva following exposure to ultraviolet (UV) radiation. Wavelengths shorter than 320 nm are most effective in causing this condition. The peak of the action spectrum is approximately at 270 nm. Note: Different action spectra have been published for photo ...
Fourier Transforms and Images
... a) The electrons in the incident beam are scattered into diffracted beams. b) The phase of the electrons is changed as they go through the sample. They have a different kinetic energy in the sample, this changes the wavelength, which in turn changes the phase. ...
... a) The electrons in the incident beam are scattered into diffracted beams. b) The phase of the electrons is changed as they go through the sample. They have a different kinetic energy in the sample, this changes the wavelength, which in turn changes the phase. ...
Disorder-Enhanced Imaging with Spatially Controlled Light
... In optics, the lack of adequate reversible sensor technology withholds the use of time reversal techniques. Nevertheless, it was shown in 2007 by Vellekoop and Mosk[63] that similar results can be obtained in the optical domain by combining spatial light modulators, which are computer controlled ele ...
... In optics, the lack of adequate reversible sensor technology withholds the use of time reversal techniques. Nevertheless, it was shown in 2007 by Vellekoop and Mosk[63] that similar results can be obtained in the optical domain by combining spatial light modulators, which are computer controlled ele ...
Optically Enhanced Magnetic Resonance
... For the figure, only a single spin I = 12 was assumed. If the laser induces transitions that change both the vibrational and the spin quantum number, such as the transitions indicated by arrows in Figure 8, the resonance frequency depends clearly on the magnetic field strength. The resulting spectra ...
... For the figure, only a single spin I = 12 was assumed. If the laser induces transitions that change both the vibrational and the spin quantum number, such as the transitions indicated by arrows in Figure 8, the resonance frequency depends clearly on the magnetic field strength. The resulting spectra ...
Aalborg Universitet
... ion-beam (FIB) milling of 900-nm-thick gold films deposited on fused silica substrates (Fig. 2a). Using single-line milling (with 2 passes), we have successfully fabricated 250- and 350-nm-period arrays of ultra-sharp convex grooves featuring practically parallel walls at the bottom (Fig. 2b). Refle ...
... ion-beam (FIB) milling of 900-nm-thick gold films deposited on fused silica substrates (Fig. 2a). Using single-line milling (with 2 passes), we have successfully fabricated 250- and 350-nm-period arrays of ultra-sharp convex grooves featuring practically parallel walls at the bottom (Fig. 2b). Refle ...
Optical coherence tomography
Optical coherence tomography (OCT) is an established medical imaging technique that uses light to capture micrometer-resolution, three-dimensional images from within optical scattering media (e.g., biological tissue). Optical coherence tomography is based on low-coherence interferometry, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium. Confocal microscopy, another optical technique, typically penetrates less deeply into the sample but with higher resolution.Depending on the properties of the light source (superluminescent diodes, ultrashort pulsed lasers, and supercontinuum lasers have been employed), optical coherence tomography has achieved sub- micrometer resolution (with very wide-spectrum sources emitting over a ~100 nm wavelength range).Optical coherence tomography is one of a class of optical tomographic techniques. A relatively recent implementation of optical coherence tomography, frequency-domain optical coherence tomography, provides advantages in signal-to-noise ratio, permitting faster signal acquisition. Commercially available optical coherence tomography systems are employed in diverse applications, including art conservation and diagnostic medicine, notably in ophthalmology and optometry where it can be used to obtain detailed images from within the retina. Recently it has also begun to be used in interventional cardiology to help diagnose coronary artery disease. It has also shown promise in dermatology to improve the diagnostic process.