Effect of potassium nitrate on the optical and structural properties
... Non-linear optical (NLO) materials will be the key elements for future photonic technologies based on the fact that photons are capable of processing information with the speed of light. Due to this fact, the rapid development of optical communication systems has led to a demand for non linear optic ...
... Non-linear optical (NLO) materials will be the key elements for future photonic technologies based on the fact that photons are capable of processing information with the speed of light. Due to this fact, the rapid development of optical communication systems has led to a demand for non linear optic ...
幻灯片 1
... Wannier – Matt excitons (free exciton): mainly exist in semiconductors, have a large radius, are delocalized states that can move freely throughout the crystal, the binding energy ~ 0.01 eV; Frenkel excitons (tight bound excitons): found in insulator and molecular crystals, bound to specific atoms o ...
... Wannier – Matt excitons (free exciton): mainly exist in semiconductors, have a large radius, are delocalized states that can move freely throughout the crystal, the binding energy ~ 0.01 eV; Frenkel excitons (tight bound excitons): found in insulator and molecular crystals, bound to specific atoms o ...
Strong Dispersive and Nonlinear Optical Properties of
... The lowest attainable switching energy is obtained when the pulsewidth is of the order of the cavity lifetime (inverse of the resonator bandwidth). This is easily understood because a longer pulse with the same peak power will carry more energy but not be any more effective at switching. A shorter pu ...
... The lowest attainable switching energy is obtained when the pulsewidth is of the order of the cavity lifetime (inverse of the resonator bandwidth). This is easily understood because a longer pulse with the same peak power will carry more energy but not be any more effective at switching. A shorter pu ...
Suppression of stimulated Brillouin scattering in
... Stimulated Brillouin scattering (SBS) is a nonlinear process that can occur in optical fibers at relatively low input power levels [1]. It manifests as the generation of a backward-propagating Stokes wave, downshifted in frequency from the incident light by an amount equal to the acoustic-wave frequ ...
... Stimulated Brillouin scattering (SBS) is a nonlinear process that can occur in optical fibers at relatively low input power levels [1]. It manifests as the generation of a backward-propagating Stokes wave, downshifted in frequency from the incident light by an amount equal to the acoustic-wave frequ ...
Fabrication of functional surfaces using ultrashort laser pulse ablation
... In case of silicon, etching based methods have been used to enhance optical absorption. Nowadays also femtosecond based methods have been studied in this area [18, 19]. Recently femtosecond laser based methods to enhance absorption of other materials than silicon have been studied by A.Y. Vorobyev a ...
... In case of silicon, etching based methods have been used to enhance optical absorption. Nowadays also femtosecond based methods have been studied in this area [18, 19]. Recently femtosecond laser based methods to enhance absorption of other materials than silicon have been studied by A.Y. Vorobyev a ...
RAY OPTICS
... above. Each model of light begins with a set of postulates (provided without proof), from which a large body of results are generated. The postulates of each model are then shown to follow naturally from the next-higher-level model. In this chapter we begin with ray optics. Ray Optics Ray optics is ...
... above. Each model of light begins with a set of postulates (provided without proof), from which a large body of results are generated. The postulates of each model are then shown to follow naturally from the next-higher-level model. In this chapter we begin with ray optics. Ray Optics Ray optics is ...
Measuring Recidivism: Definitions, Errors, and Data Sources
... Error will exist in studies no matter what definition they choose to use. These errors are not unreasonable, though, and any definition will underestimate the “true” recidivism rate because rates are based on official criminal record data which will only show crimes for which people have been arres ...
... Error will exist in studies no matter what definition they choose to use. These errors are not unreasonable, though, and any definition will underestimate the “true” recidivism rate because rates are based on official criminal record data which will only show crimes for which people have been arres ...
OM1 - Faculty of Engineering
... reflected by the beam splitter. Thus, the two beams are brought together to form interference fringes. Since one beam passes through BS 3 times, a compensating plate C is required for another beam so that both beams pass through equal thickness of glass. The inclusion of a compensating plate negates ...
... reflected by the beam splitter. Thus, the two beams are brought together to form interference fringes. Since one beam passes through BS 3 times, a compensating plate C is required for another beam so that both beams pass through equal thickness of glass. The inclusion of a compensating plate negates ...
Characterizing Multiplexing and Diversity in Visual MIMO Ashwin Ashok , Marco Gruteser
... short ranges or require complex processing at the receiver [17], [21], [22]. Though photo diodes can convert pulses at very high rates, they suffer from large interference and background light noise. This results in very low SNRs and thus short communication ranges. We showed analytically in [6], ba ...
... short ranges or require complex processing at the receiver [17], [21], [22]. Though photo diodes can convert pulses at very high rates, they suffer from large interference and background light noise. This results in very low SNRs and thus short communication ranges. We showed analytically in [6], ba ...
Design of Refractive Index Profile for Multimode Optical Fibers with
... categories [1]. It is an effect caused by narrow laser beam injection into the center region of multimode fiber core. As emission from the conventional VCSEL usually consists of about 5 or 6 transversal modes LPlm with maximal azimuthal order l not more than 3, and singlemode Fabry-Perot laser diode ...
... categories [1]. It is an effect caused by narrow laser beam injection into the center region of multimode fiber core. As emission from the conventional VCSEL usually consists of about 5 or 6 transversal modes LPlm with maximal azimuthal order l not more than 3, and singlemode Fabry-Perot laser diode ...
Enhancing four-wave-mixing processes by nanowire arrays coupled to a gold film Ekaterina Poutrina,
... Four wave mixing (FWM) is a nonlinear optical process that has found numerous practical applications, including: optical processing [1–3]; nonlinear imaging [4, 5]; real-time holography and phase-conjugate optics [6–8]; phase-sensitive amplification [9, 10]; and entangled photon pair production [11, ...
... Four wave mixing (FWM) is a nonlinear optical process that has found numerous practical applications, including: optical processing [1–3]; nonlinear imaging [4, 5]; real-time holography and phase-conjugate optics [6–8]; phase-sensitive amplification [9, 10]; and entangled photon pair production [11, ...
amplitude transfer function
... Diffraction–limited resolution (safe) Two point objects are “just resolvable just resolvable” (limited by diffraction only) if they are separated by: ...
... Diffraction–limited resolution (safe) Two point objects are “just resolvable just resolvable” (limited by diffraction only) if they are separated by: ...
Early-time dynamics of the photoexcited hydrated electron
... of the hydrated electron obtained with an unprecedented time resolution of 5-fs pulses. Based on the comparison of photon echo signals from hydrated electrons and from water alone, we derive a 1.6 fs pure dephasing time of the hydrated electrons. This value is fully consistent with the line shape of ...
... of the hydrated electron obtained with an unprecedented time resolution of 5-fs pulses. Based on the comparison of photon echo signals from hydrated electrons and from water alone, we derive a 1.6 fs pure dephasing time of the hydrated electrons. This value is fully consistent with the line shape of ...
The absorption factor of crystalline silicon PV cells: A
... The absorption factor of a PV cell is defined as the fraction of incident solar irradiance that is absorbed by the cell. This absorption factor is one of the major parameters determining the cell temperature under operational conditions. Experimentally the absorption factor can be derived from reflect ...
... The absorption factor of a PV cell is defined as the fraction of incident solar irradiance that is absorbed by the cell. This absorption factor is one of the major parameters determining the cell temperature under operational conditions. Experimentally the absorption factor can be derived from reflect ...
The IEEE 802.3 Standard (Ethernet):
... send data at the same time. There are sophisticated techniques used to keep this from occurring on a regular basis. These techniques will be discussed later. When a node on an Ethernet network wishes to send information to another node, it first listens to the network to see if there is network tra ...
... send data at the same time. There are sophisticated techniques used to keep this from occurring on a regular basis. These techniques will be discussed later. When a node on an Ethernet network wishes to send information to another node, it first listens to the network to see if there is network tra ...
Nanowire Grid Polarizers for Mid- and Long-Wavelength
... applications ranging from imaging and displays to communications and scientific instrumentation. The WGP typically consists of an array of metallic lines with sub-wavelength pitch supported by a transparent substrate. Wire grid structures are known to be effective as infrared polarizers with short o ...
... applications ranging from imaging and displays to communications and scientific instrumentation. The WGP typically consists of an array of metallic lines with sub-wavelength pitch supported by a transparent substrate. Wire grid structures are known to be effective as infrared polarizers with short o ...
Get PDF - OSA Publishing
... consideration of a complex three-mirror cavity, such as the cleaved-coupled-cavity diode laser.4 In our case this is a self-induced three-mirror cavity, formed by the two cavity mirrors and between them the distributed mirror provided by the grating. The weakest losses are obtained for a mode of the ...
... consideration of a complex three-mirror cavity, such as the cleaved-coupled-cavity diode laser.4 In our case this is a self-induced three-mirror cavity, formed by the two cavity mirrors and between them the distributed mirror provided by the grating. The weakest losses are obtained for a mode of the ...
Optics and Quantum Electronics - Research Laboratory of Electronics
... Ti:sapphire laser at a repetition rate of 90 MHz and an average output power of 200 mW. In this laser, the pulse duration was limited by the bandwidth over which the DCMs can balance the dispersion inside the cavity. The gain bandwidth of Ti:Al2O3 extends from 600 nm to almost 1200 nm and would enab ...
... Ti:sapphire laser at a repetition rate of 90 MHz and an average output power of 200 mW. In this laser, the pulse duration was limited by the bandwidth over which the DCMs can balance the dispersion inside the cavity. The gain bandwidth of Ti:Al2O3 extends from 600 nm to almost 1200 nm and would enab ...
Fabrication of two-layer integrated phase mask for
... by isointensity (iso-laser dosage) surfaces of interference patterns [10]. A desired geometrical structure could be obtained by single or multiple exposures [7-9, 11, 12]. The holographic lithography has also been used to produce tunable photonic crystals in a liquid crystal and polymer system [13], ...
... by isointensity (iso-laser dosage) surfaces of interference patterns [10]. A desired geometrical structure could be obtained by single or multiple exposures [7-9, 11, 12]. The holographic lithography has also been used to produce tunable photonic crystals in a liquid crystal and polymer system [13], ...
Light at work: The use of optical forces for particle manipulation
... and describe their interesting applications. The review should help researchers, especially those working outside of the field, to be inspired by these not yet widespread methods and consider their new applications. The article is organized as follows: in Section 2 we give a brief explanation of the ...
... and describe their interesting applications. The review should help researchers, especially those working outside of the field, to be inspired by these not yet widespread methods and consider their new applications. The article is organized as follows: in Section 2 we give a brief explanation of the ...
3D optical data storage
3D optical data storage is the term given to any form of optical data storage in which information can be recorded and/or read with three-dimensional resolution (as opposed to the two-dimensional resolution afforded, for example, by CD).This innovation has the potential to provide petabyte-level mass storage on DVD-sized discs (120mm). Data recording and readback are achieved by focusing lasers within the medium. However, because of the volumetric nature of the data structure, the laser light must travel through other data points before it reaches the point where reading or recording is desired. Therefore, some kind of nonlinearity is required to ensure that these other data points do not interfere with the addressing of the desired point.No commercial product based on 3D optical data storage has yet arrived on the mass market, although several companies are actively developing the technology and claim that it may become available ""soon"".