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Femtosecond self-guided atmospheric light strings
... self-focusing. Various theoretical explanations for the formation of this novel light guide have been put forward by different authors. The critical power for cw self-focusing in air is estimated to be about 1–2 GW. The first explanation offered for this phenomenon was that a stationary waveguide co ...
... self-focusing. Various theoretical explanations for the formation of this novel light guide have been put forward by different authors. The critical power for cw self-focusing in air is estimated to be about 1–2 GW. The first explanation offered for this phenomenon was that a stationary waveguide co ...
Слайд 1 - Eventry
... method is widely used in tissue optics for processing the experimental data of spectrophotometry with integrating spheres. This method allows one to determine the absorption and the reduced scattering coefficients of a turbid media from the measured values of the total transmittance and the diffuse ...
... method is widely used in tissue optics for processing the experimental data of spectrophotometry with integrating spheres. This method allows one to determine the absorption and the reduced scattering coefficients of a turbid media from the measured values of the total transmittance and the diffuse ...
2. Measurement of refractive index of liquids using fiber optic
... The paper describes a technique to determine the refractive index of liquids using reflective type fiber optic displacement sensor. The sensor consists of two multimode step index fibers and a mirror. The output light intensity from the receiving fiber is measured as a function of displacement of th ...
... The paper describes a technique to determine the refractive index of liquids using reflective type fiber optic displacement sensor. The sensor consists of two multimode step index fibers and a mirror. The output light intensity from the receiving fiber is measured as a function of displacement of th ...
Evidence for wavelength dependence of the scattering phase
... that measured values of bb兾b470 tended to be higher than those for bb兾b676 and that their ratio [B in Eq. 4] was usually greater than unity. However, the Hydroscat 676-nm channel covers a relatively broad wave band (20 nm FWHM) that partly overlaps with the fluorescence emission spectrum of chloroph ...
... that measured values of bb兾b470 tended to be higher than those for bb兾b676 and that their ratio [B in Eq. 4] was usually greater than unity. However, the Hydroscat 676-nm channel covers a relatively broad wave band (20 nm FWHM) that partly overlaps with the fluorescence emission spectrum of chloroph ...
Luminescence properties of a Fibonacci photonic
... between properties of light in these structures and those of electrons in semiconductors. Photonic bandgaps that form in PCs modify many of fundamental properties of light providing new opportunities for fundamental research and applications that have been explored widely. One of the important examp ...
... between properties of light in these structures and those of electrons in semiconductors. Photonic bandgaps that form in PCs modify many of fundamental properties of light providing new opportunities for fundamental research and applications that have been explored widely. One of the important examp ...
Adaptive secondary mirrors
... • If sodium layer is illuminated with a single frequency laser tuned to the peak of the D2 line only a few per cent (of order 10 MHz/1GHz) of the atoms travel in a direction to interact at all with the radiation field. • These atoms interact strongly with the radiation until they collide or change d ...
... • If sodium layer is illuminated with a single frequency laser tuned to the peak of the D2 line only a few per cent (of order 10 MHz/1GHz) of the atoms travel in a direction to interact at all with the radiation field. • These atoms interact strongly with the radiation until they collide or change d ...
laser spectroscopy
... The output beam from the laser is split into three beams, two less intense probe beams and a more intense pump beam, at the thick beamsplitter. The two probe beams pass through the rubidium cell from top to bottom, and they are separately detected by two photodiodes. The two photodiodes form a balan ...
... The output beam from the laser is split into three beams, two less intense probe beams and a more intense pump beam, at the thick beamsplitter. The two probe beams pass through the rubidium cell from top to bottom, and they are separately detected by two photodiodes. The two photodiodes form a balan ...
Sample Pages
... coating, which not only mechanically protects the fiber, but also causes high propagation losses for cladding modes. Any power in cladding modes may then quickly decay and will not get to the fiber end (except when the fiber is rather short). The light launched into the core has much lower propagati ...
... coating, which not only mechanically protects the fiber, but also causes high propagation losses for cladding modes. Any power in cladding modes may then quickly decay and will not get to the fiber end (except when the fiber is rather short). The light launched into the core has much lower propagati ...
Optical properties of the human tissue
... method is widely used in tissue optics for processing the experimental data of spectrophotometry with integrating spheres. This method allows one to determine the absorption and the reduced scattering coefficients of a turbid media from the measured values of the total transmittance and the diffuse ...
... method is widely used in tissue optics for processing the experimental data of spectrophotometry with integrating spheres. This method allows one to determine the absorption and the reduced scattering coefficients of a turbid media from the measured values of the total transmittance and the diffuse ...
Optical amplifier
An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics.There are several different physical mechanisms that can be used to amplify a light signal, which correspond to the major types of optical amplifiers. In doped fibre amplifiers and bulk lasers, stimulated emission in the amplifier's gain medium causes amplification of incoming light. In semiconductor optical amplifiers (SOAs), electron-hole recombination occurs. In Raman amplifiers, Raman scattering of incoming light with phonons in the lattice of the gain medium produces photons coherent with the incoming photons. Parametric amplifiers use parametric amplification.