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optical coherence tomography
... were obtained from holographically recorded scattered field data nearly two decades ago.9,10 These first attempts, however, were not further extended at that time because no spatially coherent broadband light sources were available. Later, with the availability of spatially coherent broadband light ...
... were obtained from holographically recorded scattered field data nearly two decades ago.9,10 These first attempts, however, were not further extended at that time because no spatially coherent broadband light sources were available. Later, with the availability of spatially coherent broadband light ...
Wei Zhang, Hainian Han, Yanying Zhao, Qiang Du, Zhiyi Wei. A
... The advent of the femtosecond optical frequency comb represents a breakthrough of high precision optical frequency measurement [1,2]. In 1999, the optical frequency measurement with the frequency comb based on Ti:sapphire mode-locked laser has opened a revolutionary progress in frequency metrology [ ...
... The advent of the femtosecond optical frequency comb represents a breakthrough of high precision optical frequency measurement [1,2]. In 1999, the optical frequency measurement with the frequency comb based on Ti:sapphire mode-locked laser has opened a revolutionary progress in frequency metrology [ ...
Dynamic method to distinguish between left- and right
... atoms with coexisting one- and two-photon transitions. They can be selectively optically excited to any state. As an example, we show that left- and right-handed chiral molecules starting in the same initial states can evolve into different final states by a purely dynamic transfer process. That mea ...
... atoms with coexisting one- and two-photon transitions. They can be selectively optically excited to any state. As an example, we show that left- and right-handed chiral molecules starting in the same initial states can evolve into different final states by a purely dynamic transfer process. That mea ...
Optical Nonlinearities in the Transparency Region of Bulk Semiconductors . W
... have been in semiconductors (Miller and Duncan, 1987; Hill et al., 1982) and involve near-gap excitation. However, these resonant nonlinearities, by their nature, involve significant linear absorption (see Chap. 1 in this volume and Chap. 5 in Vol. 59), which is undesirable in many applications. In ...
... have been in semiconductors (Miller and Duncan, 1987; Hill et al., 1982) and involve near-gap excitation. However, these resonant nonlinearities, by their nature, involve significant linear absorption (see Chap. 1 in this volume and Chap. 5 in Vol. 59), which is undesirable in many applications. In ...
PDF
... our group recently demonstrated a new type of source which relies instead on parametric processes in optical fibers utilizing the χ (3) , or Kerr nonlinearity [4, 5, 6, 7]. In the experiments conducted by Fiorentino et al. [5] and Li et al. [6, 7], a commercially available dispersionshifted fiber wa ...
... our group recently demonstrated a new type of source which relies instead on parametric processes in optical fibers utilizing the χ (3) , or Kerr nonlinearity [4, 5, 6, 7]. In the experiments conducted by Fiorentino et al. [5] and Li et al. [6, 7], a commercially available dispersionshifted fiber wa ...
Fundamentals of Optical Interferometry for Thermal Expansion
... electronics, high speed photodetectors, CCD cameras and computerized data acquisition systems have considerably improved the versatility, range and resolution of interferometers, allowing a wide variety of applications (Table I). A major advantage of laser interferometry for length measurements is t ...
... electronics, high speed photodetectors, CCD cameras and computerized data acquisition systems have considerably improved the versatility, range and resolution of interferometers, allowing a wide variety of applications (Table I). A major advantage of laser interferometry for length measurements is t ...
View
... • Production of a magnified image of the lamp filament that is focused at the level of the aperture plane of the condensor. • Opening or closing this diaphragm controls the angle of the light cone that reaches the specimen, which is determining the image resolution along with the numerical aperture ...
... • Production of a magnified image of the lamp filament that is focused at the level of the aperture plane of the condensor. • Opening or closing this diaphragm controls the angle of the light cone that reaches the specimen, which is determining the image resolution along with the numerical aperture ...
Week 9 Wed. (Lesson 15) Coherence and Optical Tomography
... • Required for interference and diffraction • Before lasers need to place slits far from source or pass light through slit so only part of source seen Temporal Coherence • Correlation of phase at the same point but at different times • Regular sources rapidly change phase relationships • Single atom ...
... • Required for interference and diffraction • Before lasers need to place slits far from source or pass light through slit so only part of source seen Temporal Coherence • Correlation of phase at the same point but at different times • Regular sources rapidly change phase relationships • Single atom ...
Experimental investigation of the propagation properties of bloch
... the photonics band gap can be engineered by tailoring the thickness of the topmost layer of the multilayer, it is possible to tune the evanescent field content in the external medium. This ability to tune the localized field confinement is very appealing for sensing applications [19, 20]. The propag ...
... the photonics band gap can be engineered by tailoring the thickness of the topmost layer of the multilayer, it is possible to tune the evanescent field content in the external medium. This ability to tune the localized field confinement is very appealing for sensing applications [19, 20]. The propag ...
IEEE J. Quantum Electron. 33, 970 (1997)
... CHUANG et al.: KINETIC MODEL FOR DEGRADATION OF LIGHT-EMITTING DIODES ...
... CHUANG et al.: KINETIC MODEL FOR DEGRADATION OF LIGHT-EMITTING DIODES ...
Tapered Fiber Fabrication
... perfect sphere [Braginsky89, Gorodetsky96, Vernooy98]. More recently, a group at Caltech has demonstrated ultrahigh-Q WGM resonators on a silicon chip [Armani03]. These devices combine the ultrahigh-Q factors of molten silica WGM devices with the ultra-small mode-volumes of microcavities. This uniqu ...
... perfect sphere [Braginsky89, Gorodetsky96, Vernooy98]. More recently, a group at Caltech has demonstrated ultrahigh-Q WGM resonators on a silicon chip [Armani03]. These devices combine the ultrahigh-Q factors of molten silica WGM devices with the ultra-small mode-volumes of microcavities. This uniqu ...
Get PDF - OSA Publishing
... only be calculated from the higher order statistics such as the variance of the mode power, or the covariance between the powers of different modes. To tackle these unresolved problems, we have conducted the following works: 1) A set of stochastic differential equations (SDEs) is proposed to describ ...
... only be calculated from the higher order statistics such as the variance of the mode power, or the covariance between the powers of different modes. To tackle these unresolved problems, we have conducted the following works: 1) A set of stochastic differential equations (SDEs) is proposed to describ ...
EE 420 - Optical Fiber Communications Lab
... Where a is the core radius and x is the lateral separation. Notice that equation (1) has a limited, but very practical range of applicability. Determination of the fiber misalignment loss should be straight forward to do experimentally. However, there are two difficulties. First, two fibers with rel ...
... Where a is the core radius and x is the lateral separation. Notice that equation (1) has a limited, but very practical range of applicability. Determination of the fiber misalignment loss should be straight forward to do experimentally. However, there are two difficulties. First, two fibers with rel ...
The Phenomenon of Total Internal Reflection and Acceleration of
... The phenomenon of total internal reflection that happens inside the fibers works on transmitting the light universally with a high speed that exceeds all the transmission media [1] fiber optics is a tangible transmission medium that transmits data between two points by the light so it differs from o ...
... The phenomenon of total internal reflection that happens inside the fibers works on transmitting the light universally with a high speed that exceeds all the transmission media [1] fiber optics is a tangible transmission medium that transmits data between two points by the light so it differs from o ...
White top-emitting organic light-emitting diodes using one
... ITO/SiO2, the use of ITO/SiO2 also showed the highest power efficiency. In addition, possibly due to the differences in the reflectivity of the light between the cathode metal and air for different wavelengths, the extracted EL intensity of the orange color relative to that of the sky blue color was ...
... ITO/SiO2, the use of ITO/SiO2 also showed the highest power efficiency. In addition, possibly due to the differences in the reflectivity of the light between the cathode metal and air for different wavelengths, the extracted EL intensity of the orange color relative to that of the sky blue color was ...
Photonic Crystals - Materials Computation Center
... “ If only were possible to make materials in which electromagnetically waves cannot propagate at certain frequencies, all kinds of almost-magical things would happen” Sir John Maddox, Nature (1990) ...
... “ If only were possible to make materials in which electromagnetically waves cannot propagate at certain frequencies, all kinds of almost-magical things would happen” Sir John Maddox, Nature (1990) ...
Nonlinear Beam Shaping with Plasmonic Metasurfaces
... ABSTRACT: We present here a method for generating second-harmonic beams with tailored beam profiles using nonlinear metasurfaces based on split ring resonators. By manipulating both the phase and the amplitude of the quadratic nonlinear coefficient locally, at the single inclusion level, the emitted se ...
... ABSTRACT: We present here a method for generating second-harmonic beams with tailored beam profiles using nonlinear metasurfaces based on split ring resonators. By manipulating both the phase and the amplitude of the quadratic nonlinear coefficient locally, at the single inclusion level, the emitted se ...
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.