A nanometer notch filter with high rejection and throughput
... less than lo-nm bandwidth;lY2in the caseof ruby, the presence of two adjacent absorption lines (Rl and R2) limits the bandwidth to a few nanometers. Rejection based on grating spectrometers3can also be used but with a much lower throughput than available from amplitude division devices,such as Fabry ...
... less than lo-nm bandwidth;lY2in the caseof ruby, the presence of two adjacent absorption lines (Rl and R2) limits the bandwidth to a few nanometers. Rejection based on grating spectrometers3can also be used but with a much lower throughput than available from amplitude division devices,such as Fabry ...
Optical bandwidth and fabrication tolerances of multimode
... are positioned at W/3 and 2W/3, in order not to excite the modes 2 , 5, 8 , - . .. For a geometrical width of W = 18 prn, the equivalent width is We, = 19.2 pm and 19.0 pm for TE and TM, respectively; this is due to the lateral penetration of the evanescent fields at the side of the MMI section. The ...
... are positioned at W/3 and 2W/3, in order not to excite the modes 2 , 5, 8 , - . .. For a geometrical width of W = 18 prn, the equivalent width is We, = 19.2 pm and 19.0 pm for TE and TM, respectively; this is due to the lateral penetration of the evanescent fields at the side of the MMI section. The ...
Through the Looking Glass
... gratings, we turn momentarily to holography. In fact, the true father of phase conjugation may well be the person who developed the notion of the hologram, Dennis Gabor (with help from W. L. Bragg). We say this because there are important similarities between holography and optical phase conjugation ...
... gratings, we turn momentarily to holography. In fact, the true father of phase conjugation may well be the person who developed the notion of the hologram, Dennis Gabor (with help from W. L. Bragg). We say this because there are important similarities between holography and optical phase conjugation ...
Impact of Liquid Crystals in Active and Adaptive Optics
... phase shift between the two propagation modes allowed by the waveguide in order to modulate their interference (see [45-46] for deeper analysis). Another example is the use of LCs in a tunable photonic-crystal waveguide Match-Zehnder interferometer where the LC changes the phase difference between t ...
... phase shift between the two propagation modes allowed by the waveguide in order to modulate their interference (see [45-46] for deeper analysis). Another example is the use of LCs in a tunable photonic-crystal waveguide Match-Zehnder interferometer where the LC changes the phase difference between t ...
Simultaneous slow and fast light effects using in atomic vapor
... cell. These two heterodyne signals are detected using two fast photodetectors. The phase difference between the two rf signals varies in response to probe dispersion as the probe frequency is scanned around the gain resonance. A mixer with low phase–noise and a lowpass frequency filter are used to d ...
... cell. These two heterodyne signals are detected using two fast photodetectors. The phase difference between the two rf signals varies in response to probe dispersion as the probe frequency is scanned around the gain resonance. A mixer with low phase–noise and a lowpass frequency filter are used to d ...
The Equation of Number the Total Internal of Reflection Angles
... minimum the difference in axial propagation speed of the various rays in the fiber. This ideal index profile is very close to a parabolic relationship between the index and distance from the axis [8]. Fiber with a core diameter less than about ten times the wavelength of propagating light cannot be ...
... minimum the difference in axial propagation speed of the various rays in the fiber. This ideal index profile is very close to a parabolic relationship between the index and distance from the axis [8]. Fiber with a core diameter less than about ten times the wavelength of propagating light cannot be ...
A new approach for retrieving the UV–vis optical properties of
... Received: 3 March 2016 – Published in Atmos. Meas. Tech. Discuss.: 30 March 2016 Revised: 28 June 2016 – Accepted: 29 June 2016 – Published: 1 August 2016 ...
... Received: 3 March 2016 – Published in Atmos. Meas. Tech. Discuss.: 30 March 2016 Revised: 28 June 2016 – Accepted: 29 June 2016 – Published: 1 August 2016 ...
RESOLUTION OF ICCD CAMERAS
... (C.a)/(a²+x²) where C and a are constants and x the pixel number. In this particular case, after making the appropriate unit conversion, a FWHM of about 27.9 μm was found. By applying a Fourier transformation to the fitting Lorentzian function, a MTF equation of the form exp(-0.0876 f) was obtained ...
... (C.a)/(a²+x²) where C and a are constants and x the pixel number. In this particular case, after making the appropriate unit conversion, a FWHM of about 27.9 μm was found. By applying a Fourier transformation to the fitting Lorentzian function, a MTF equation of the form exp(-0.0876 f) was obtained ...
View/Open - Dora.dmu.ac.uk
... Holography is a branch of optics and it is mostly unknown to a lay man as it contains complicated scientific terms in its definition such as diffraction and interference. The main focus of this paper is to briefly explain these terms using analogies and discuss the construction details of the CυBE. ...
... Holography is a branch of optics and it is mostly unknown to a lay man as it contains complicated scientific terms in its definition such as diffraction and interference. The main focus of this paper is to briefly explain these terms using analogies and discuss the construction details of the CυBE. ...
ABSTRACT Dissertation: STUDIES OF
... wavelength. However, when the dimension of an object is in the nanometer range, a lot of optical properties change. For example, from Ebbesen’s reports1,2 in Nature 1998 and 2003, showed that there was enormous transmission (1000 times higher than predicted by existing theory) through an optically t ...
... wavelength. However, when the dimension of an object is in the nanometer range, a lot of optical properties change. For example, from Ebbesen’s reports1,2 in Nature 1998 and 2003, showed that there was enormous transmission (1000 times higher than predicted by existing theory) through an optically t ...
Light and Optical Systems
... cosmetic mirrors and car headlights Mirrors that bulge out are called Convex mirrors Convex mirrors form images that appear much smaller and farther away than the object - but they can reflect light from a large area Focal point is in behind mirror rear-view mirrors and side mirrors on automobiles ...
... cosmetic mirrors and car headlights Mirrors that bulge out are called Convex mirrors Convex mirrors form images that appear much smaller and farther away than the object - but they can reflect light from a large area Focal point is in behind mirror rear-view mirrors and side mirrors on automobiles ...
LABORATORY MANUAL (Modern Physics & General Optics) PL – 402 (2013-2014)
... EXPT# 01: Determination of Planck’s constant and work function of metals using photoelectric effect Introduction One of the most important experiments from the early 20th century was the photoelectric effect experiment. In this experiment, shinning a light upon a metal surface may cause electrons t ...
... EXPT# 01: Determination of Planck’s constant and work function of metals using photoelectric effect Introduction One of the most important experiments from the early 20th century was the photoelectric effect experiment. In this experiment, shinning a light upon a metal surface may cause electrons t ...
chapter 8 optical pyrometry
... and the optical pyrometer, however. We must be sure that the radiation observed is that being emitted by the test body rather than reflected radiation, since there is no relationship between the temperature of a surface and the radiation it reflects. Also, smoke or fumes between the optical pyromete ...
... and the optical pyrometer, however. We must be sure that the radiation observed is that being emitted by the test body rather than reflected radiation, since there is no relationship between the temperature of a surface and the radiation it reflects. Also, smoke or fumes between the optical pyromete ...
NPM-O22 Influences of different low level laser power at
... simulation program 2009 V1R1 use to investigate this work. Material and Methods Simulation program The simulation method by an advanced system analysis program (ASAP) provides a conceptually simple and flexible, yet careful way of illustrating light radiation transfer within a tissue. An ASAP of des ...
... simulation program 2009 V1R1 use to investigate this work. Material and Methods Simulation program The simulation method by an advanced system analysis program (ASAP) provides a conceptually simple and flexible, yet careful way of illustrating light radiation transfer within a tissue. An ASAP of des ...
Plasmonic chirality of L-shaped nanostructure composed of two
... polarization [13,14]. A simple, flexible, and effective method to fabricate ACPNs is needed to expand the application of ACPNs. In recent years, four main methods have been used to fabricate ACPNs. First, electron beam lithography (EBL) was used to prepare planar ACPNs with precise dimensions [15,1 ...
... polarization [13,14]. A simple, flexible, and effective method to fabricate ACPNs is needed to expand the application of ACPNs. In recent years, four main methods have been used to fabricate ACPNs. First, electron beam lithography (EBL) was used to prepare planar ACPNs with precise dimensions [15,1 ...
Slow light in various media: a tutorial
... ⬍ S ⬍ 1兲 is absent in Fig. 1(d), and it is important that fast light is associated with the absorption peak, while the slow light is associated only with the off-resonant absorption; hence significant delays of the signal in the slow light are quite possible, while significant advances are difficult ...
... ⬍ S ⬍ 1兲 is absent in Fig. 1(d), and it is important that fast light is associated with the absorption peak, while the slow light is associated only with the off-resonant absorption; hence significant delays of the signal in the slow light are quite possible, while significant advances are difficult ...
Vision-Realistic Rendering: Simulation of the Scanned Foveal
... fundamental spectral sensitivity functions of the human visual system. They used this color space to modify a full color image to represent a color-deficient view of the scene. Meyer [1990] discusses the first two stages (fundamental spectral sensitivities and opponent processing) of the human color ...
... fundamental spectral sensitivity functions of the human visual system. They used this color space to modify a full color image to represent a color-deficient view of the scene. Meyer [1990] discusses the first two stages (fundamental spectral sensitivities and opponent processing) of the human color ...
A compact laser head with high-frequency stability for Rb atomic
... measured sensitivity of the Doppler-free resonance frequencies to variations of selected parameters, which are in good agreement with the values reported in previous studies29,30 for more elaborated setups. Table II also gives the resulting frequency drifts of the stabilized laser, calculated from t ...
... measured sensitivity of the Doppler-free resonance frequencies to variations of selected parameters, which are in good agreement with the values reported in previous studies29,30 for more elaborated setups. Table II also gives the resulting frequency drifts of the stabilized laser, calculated from t ...
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 ...
WAVE OPTICS Jaan Kalda 1 Basics. Double slit diffraction.
... in majority of cases. Let us analyse this using the example of real- and imaginary parts, respectively); because of that, alterndouble slit diffraction (for some problems, including the first atively, vector diagrams can be used (each wave is represented one, solutions are provided after the problem ...
... in majority of cases. Let us analyse this using the example of real- and imaginary parts, respectively); because of that, alterndouble slit diffraction (for some problems, including the first atively, vector diagrams can be used (each wave is represented one, solutions are provided after the problem ...
WIND-INTERACTION MODELS FOR THE EARLY AFTERGLOWS
... The gamma-ray burst GRB 021004 was detected by the HETE II satellite (Shirasaki et al. 2002) and had an optical afterglow detected within minutes of the γ-ray burst (Fox et al. 2003b). The early light curves of the only other afterglows detected at such early times, GRBs 990123 (Akerlof et al. 1999) ...
... The gamma-ray burst GRB 021004 was detected by the HETE II satellite (Shirasaki et al. 2002) and had an optical afterglow detected within minutes of the γ-ray burst (Fox et al. 2003b). The early light curves of the only other afterglows detected at such early times, GRBs 990123 (Akerlof et al. 1999) ...
Diamond chemical-vapor deposition on optical fibers for
... and industry. In building on such successes, the next major breakthrough in photonics is set to occur with the integration of true quantum elements with classical photonic structures. As such, these devices would build upon, but are qualitatively different from classical optically active structures ...
... and industry. In building on such successes, the next major breakthrough in photonics is set to occur with the integration of true quantum elements with classical photonic structures. As such, these devices would build upon, but are qualitatively different from classical optically active structures ...
Introduction of Minor Nonlinear Effect Strain Insensitive SMF Fitting
... In this paper, the strain insensitive single mode optical fiber with low nonlinear effects and ultra low bending loss (BL), appropriate for small curvature radius installation, is presented. The suggested design method is based on the reverse engineering which evaluates the refractive index profile ...
... In this paper, the strain insensitive single mode optical fiber with low nonlinear effects and ultra low bending loss (BL), appropriate for small curvature radius installation, is presented. The suggested design method is based on the reverse engineering which evaluates the refractive index profile ...
Improved signal-to-noise ratio of 10 GHz
... Mechanisms responsible for saturation include space-charge fields and limited output voltage. In our case, the repetition rate, pulse duration and pulse energy of the laser are not well matched to the photodiode temporal response and the desired microwave frequency. From the time domain perspective, ...
... Mechanisms responsible for saturation include space-charge fields and limited output voltage. In our case, the repetition rate, pulse duration and pulse energy of the laser are not well matched to the photodiode temporal response and the desired microwave frequency. From the time domain perspective, ...
en_20160128_lzh_pm_hymnos_final
... Liquid-guided laser beam In the subproject „Simulation of the light-guiding properties in coaxially flowing fluid pairs using wave-optical light propagation in fluid-dynamically and thermally superimposed refractive index distributions”, the beam guidance in flowing liquids will be simulated. The sc ...
... Liquid-guided laser beam In the subproject „Simulation of the light-guiding properties in coaxially flowing fluid pairs using wave-optical light propagation in fluid-dynamically and thermally superimposed refractive index distributions”, the beam guidance in flowing liquids will be simulated. The sc ...
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.