FIBER OPTICS
... core-cladding boundary at angles greater than the critical angle undergo total internal reflection and are guided through the core without refraction. Rays of greater inclination to the fiber axis lose part of their power into the cladding at each reflection and are not guided. As a result of recent ...
... core-cladding boundary at angles greater than the critical angle undergo total internal reflection and are guided through the core without refraction. Rays of greater inclination to the fiber axis lose part of their power into the cladding at each reflection and are not guided. As a result of recent ...
appel a projets recherche 2014 - lumat - Université Paris-Sud
... in space – down to the Å scale – to coherently excite electronic/nuclear wave packets in a controlled manner, and to probe their temporal evolution. These gradients are ideally provided by fully controlled photon beams, from the mid-IR to the XUV range: the manipulation of light pulses is therefore ...
... in space – down to the Å scale – to coherently excite electronic/nuclear wave packets in a controlled manner, and to probe their temporal evolution. These gradients are ideally provided by fully controlled photon beams, from the mid-IR to the XUV range: the manipulation of light pulses is therefore ...
Polarization-insensitive high-dispersion total internal reflection
... 1 at an angle i . With the grating period and the angle of incidence chosen such that expression (1) is satisfied, no light escapes into material 2 regardless of the grating groove shape. The exact grating groove profile will determine the power distribution among the various reflected diffracted ...
... 1 at an angle i . With the grating period and the angle of incidence chosen such that expression (1) is satisfied, no light escapes into material 2 regardless of the grating groove shape. The exact grating groove profile will determine the power distribution among the various reflected diffracted ...
The Nonlinear Optical Susceptibility
... fields P̃ (t) and Ẽ(t) to be scalar quantities in writing Eqs. (1.1.1) and (1.1.2). In Section 1.3 we show how to treat the vector nature of the fields; in such a case χ (1) becomes a second-rank tensor, χ (2) becomes a third-rank tensor, and so on. In writing Eqs. (1.1.1) and (1.1.2) in the forms ...
... fields P̃ (t) and Ẽ(t) to be scalar quantities in writing Eqs. (1.1.1) and (1.1.2). In Section 1.3 we show how to treat the vector nature of the fields; in such a case χ (1) becomes a second-rank tensor, χ (2) becomes a third-rank tensor, and so on. In writing Eqs. (1.1.1) and (1.1.2) in the forms ...
The Michelson Interferometer Wavelength Meter
... The temporal frequency is obtained by multiplying by the speed of light in the medium The Fourier-transform operation on the interferogram allows the wavelength of the signals to be separated and measured individually – i.e. each of the input signals is individually resolved both in frequency and in ...
... The temporal frequency is obtained by multiplying by the speed of light in the medium The Fourier-transform operation on the interferogram allows the wavelength of the signals to be separated and measured individually – i.e. each of the input signals is individually resolved both in frequency and in ...
Optimally designed narrowband guided
... Since the introduction of narrowband reflectance filters using subwavelength periodic grating nanostructures [1–3], guided-mode resonance (GMR) filters (as they have come to be called, but also known as photonic crystal slabs or photonic crystal surfaces) have found application in label-free biodete ...
... Since the introduction of narrowband reflectance filters using subwavelength periodic grating nanostructures [1–3], guided-mode resonance (GMR) filters (as they have come to be called, but also known as photonic crystal slabs or photonic crystal surfaces) have found application in label-free biodete ...
Optical Fiber Sensors Guide
... large index changes, Sceats et al. [4] proposed thermoelastic stress relaxation of the glass network caused by formation of regions of low density around broken Ge-Si bonds (stress relief model). Alternatively, Bernardin et al.[5] suggested that the UV irradiation may induce rearrangement of the mol ...
... large index changes, Sceats et al. [4] proposed thermoelastic stress relaxation of the glass network caused by formation of regions of low density around broken Ge-Si bonds (stress relief model). Alternatively, Bernardin et al.[5] suggested that the UV irradiation may induce rearrangement of the mol ...
The effect of gamma radiation on fibre Bragg
... Gamma rays are a form of electromagnetic radiation. In nuclear environments when FBG’s are exposed to gamma irradiation results have shown changes in the Bragg wavelength, although the exact cause or trigger is still unclear. The main outcome was to achieve results that are compatible with the estab ...
... Gamma rays are a form of electromagnetic radiation. In nuclear environments when FBG’s are exposed to gamma irradiation results have shown changes in the Bragg wavelength, although the exact cause or trigger is still unclear. The main outcome was to achieve results that are compatible with the estab ...
Study on the Sensing Coating of the Optical Fibre CO2 Sensor
... or optical fibre taper or optical fibre tip is coated with a matrix material with an active substance incorporated in it. The possible matrix materials are usually chosen from polymer and sol-gel groups. Measurement of the intensity of the emission peak can be used for determination of concentration ...
... or optical fibre taper or optical fibre tip is coated with a matrix material with an active substance incorporated in it. The possible matrix materials are usually chosen from polymer and sol-gel groups. Measurement of the intensity of the emission peak can be used for determination of concentration ...
Optical aberrations of intraocular lenses measured in vivo and in vitro
... jects ranged from 5 to 6 mm (as opposed to young subjects, for whom we typically use 6.5 mm). The number of sample points in the pupil was 37 in all cases; therefore the step size ranged from 0.7 to 0.8 mm. To facilitate comparisons across subjects, all data are presented for a 5-mm pupil diameter. ...
... jects ranged from 5 to 6 mm (as opposed to young subjects, for whom we typically use 6.5 mm). The number of sample points in the pupil was 37 in all cases; therefore the step size ranged from 0.7 to 0.8 mm. To facilitate comparisons across subjects, all data are presented for a 5-mm pupil diameter. ...
claudia patricia valdés escobar
... such as stroke, ischemic injuries, traumatic brain injury, as well as neurodegenerative diseases such as the Alzheimer’s [2, 3]. A stroke, is the rapid loss of cerebral functions (brain damage) due to a critical change in the CBF, i. e., blood supply in time, and it is classified into two types name ...
... such as stroke, ischemic injuries, traumatic brain injury, as well as neurodegenerative diseases such as the Alzheimer’s [2, 3]. A stroke, is the rapid loss of cerebral functions (brain damage) due to a critical change in the CBF, i. e., blood supply in time, and it is classified into two types name ...
Light Scattering in Holographic Polymer Dispersed Liquid Crystals
... differing refractive index. The width of the repeating unit is defined as the grating pitch, Λ. When light is incident on the Bragg grating, the Bragg wavelength is strongly reflected while the other wavelengths are transmitted................................ 17 Figure 10. Typical transmission s ...
... differing refractive index. The width of the repeating unit is defined as the grating pitch, Λ. When light is incident on the Bragg grating, the Bragg wavelength is strongly reflected while the other wavelengths are transmitted................................ 17 Figure 10. Typical transmission s ...
Displacement laser interferometry with sub-nanometer
... used in the interferometer system. Based on ellipsometry a setup is realized to measure the polarization properties of the optical components of the laser interferometer. With use of measurements carried out with these setups and the model it can be concluded that periodic deviations originating fro ...
... used in the interferometer system. Based on ellipsometry a setup is realized to measure the polarization properties of the optical components of the laser interferometer. With use of measurements carried out with these setups and the model it can be concluded that periodic deviations originating fro ...
Laser Medicine and Medical Imaging – J. G. Fujimoto
... (right) shows an in vivo image of cheek pouch which shows the epithelium, connective tissue and muscle layers at ultrahigh resolution. The cheek pouch was index matched by using a microscope cover glass and saline solution. ...
... (right) shows an in vivo image of cheek pouch which shows the epithelium, connective tissue and muscle layers at ultrahigh resolution. The cheek pouch was index matched by using a microscope cover glass and saline solution. ...
Laser and Gaussian Beam Propagation and Transformation
... see in this section, they are well characterized and the evolution is smooth and easily predicted. The amplitude function representing a Gaussian beam can be deduced from the boundary conditions of the optical resonator where the laser radiation is produced.[7 – 9,33,34] The geometrical characterist ...
... see in this section, they are well characterized and the evolution is smooth and easily predicted. The amplitude function representing a Gaussian beam can be deduced from the boundary conditions of the optical resonator where the laser radiation is produced.[7 – 9,33,34] The geometrical characterist ...
Optical properties scattering - IMT
... Let's choose fv = 0.02 for this example to match the value for several typical soft tissues such as lungs, spleen, prostate, ovary, intestine, liver, arteries, to name a few. ...
... Let's choose fv = 0.02 for this example to match the value for several typical soft tissues such as lungs, spleen, prostate, ovary, intestine, liver, arteries, to name a few. ...
Retrieving microphysical properties of dust
... of ellipsoids as a function of ellipsoid shape, size and refractive index. This database has been used, e.g., to model single-scattering properties of Martian dust analog particles (Merikallio et al., 2013). Regarding the ellipsoids, one fundamental question related to their use is the choice of the ...
... of ellipsoids as a function of ellipsoid shape, size and refractive index. This database has been used, e.g., to model single-scattering properties of Martian dust analog particles (Merikallio et al., 2013). Regarding the ellipsoids, one fundamental question related to their use is the choice of the ...
IOSR Journal of Applied Physics (IOSR-JAP)
... transport, mechanical and optical properties in medical and engineering technology [1, 2]. Polyvinyl alcohol (PVA) is a polymer with several interesting physical properties, which are very useful in technical application. PVA is a semi crystalline, water soluble , low electrical conductivity materia ...
... transport, mechanical and optical properties in medical and engineering technology [1, 2]. Polyvinyl alcohol (PVA) is a polymer with several interesting physical properties, which are very useful in technical application. PVA is a semi crystalline, water soluble , low electrical conductivity materia ...
Chapter 4 Optical Resonator
... 2. Semiconductor lasers are often fabricated from crystals whose surfaces are cleaved along crystal planes. These surfaces act as reflectors and therefore serve as the resonator mirrors. Consider a crystal with refractive index n = 3.6 placed in air (n = 1). The light reflects between two parallel s ...
... 2. Semiconductor lasers are often fabricated from crystals whose surfaces are cleaved along crystal planes. These surfaces act as reflectors and therefore serve as the resonator mirrors. Consider a crystal with refractive index n = 3.6 placed in air (n = 1). The light reflects between two parallel s ...
Engineering nonlinearities in nanoscale optical systems
... of the basic nonlinear optical response of Si is presented. This section will include a discussion of the basic phenomena and the various relevant nonlinear optical parameters for Si and Si-wire waveguides. In Section 4, a complete theoretical framework for modeling nonlinear pulse propagation in Si ...
... of the basic nonlinear optical response of Si is presented. This section will include a discussion of the basic phenomena and the various relevant nonlinear optical parameters for Si and Si-wire waveguides. In Section 4, a complete theoretical framework for modeling nonlinear pulse propagation in Si ...
Light manipulation with encoded plasmonic nanostructures Chenglong Zhao , Jiasen Zhang
... metal film can radiatively leak through the film and the substrate, and finally be collected by an oil-immerse lens with high numerical aperture. It allows fast mapping the SPP near-field in the way of far-field detection, compared to other time-consuming scanning techniques, such as near-field scan ...
... metal film can radiatively leak through the film and the substrate, and finally be collected by an oil-immerse lens with high numerical aperture. It allows fast mapping the SPP near-field in the way of far-field detection, compared to other time-consuming scanning techniques, such as near-field scan ...
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Optical fiber cables[edit]
... Index of refraction[edit] Main article: Refractive index The index of refraction is a way of measuring the speed of light in a material. Light travels fastest in a vacuum, such as outer space. The speed of light in a vacuum is about 300,000 kilometers (186,000 miles) per second. Index of refraction ...
... Index of refraction[edit] Main article: Refractive index The index of refraction is a way of measuring the speed of light in a material. Light travels fastest in a vacuum, such as outer space. The speed of light in a vacuum is about 300,000 kilometers (186,000 miles) per second. Index of refraction ...