Doctorat doc
... excellent hosts for rare earth elements. As a result, there are many applications for optical fibers, such as low loss repeater-less links for long distance telecommunications, fiber lasers and amplifiers, as well as infrared laser power delivery. More recently, there has been interest in using fluo ...
... excellent hosts for rare earth elements. As a result, there are many applications for optical fibers, such as low loss repeater-less links for long distance telecommunications, fiber lasers and amplifiers, as well as infrared laser power delivery. More recently, there has been interest in using fluo ...
Inverse Problems In Multiple Light Scattering
... inherently destroys specific characteristics of random processes, one can only recover limited information about the medium. This dissertation discusses practical means that go beyond ensemble averaging to probe complex media and extract additional information about a random scattering system. The d ...
... inherently destroys specific characteristics of random processes, one can only recover limited information about the medium. This dissertation discusses practical means that go beyond ensemble averaging to probe complex media and extract additional information about a random scattering system. The d ...
Principles of Fiber Optic Communication
... In a conventional telephone system, voice signals are converted into equivalent electrical signals by the microphone and are transmitted as electrical currents through metallic (copper or aluminum) wires to the local telephone exchange. Thereafter, these signals continue to travel as electric curren ...
... In a conventional telephone system, voice signals are converted into equivalent electrical signals by the microphone and are transmitted as electrical currents through metallic (copper or aluminum) wires to the local telephone exchange. Thereafter, these signals continue to travel as electric curren ...
pattern formation and competition in nonlinear optics - Ino-Cnr
... to introduce a general classi"cation of optical patterns, within which it is easy to include also classes of phenomena observed in #uid and chemistry. For convenience, we have collected in Appendix A some introductory facts on nonlinear optics, together with the corresponding jargon. 1.2. Aspect rat ...
... to introduce a general classi"cation of optical patterns, within which it is easy to include also classes of phenomena observed in #uid and chemistry. For convenience, we have collected in Appendix A some introductory facts on nonlinear optics, together with the corresponding jargon. 1.2. Aspect rat ...
THESIS Theoretical Study of Light Scattering by an Elliptical Cylinder
... wavelength) is easy to go through the thick atmosphere than the blue one while the later is more scattered in the sky. The second reason is that the knowledge acquired in understanding those phenomena serves us in the development of new measurement technologies. When the light interacts with particl ...
... wavelength) is easy to go through the thick atmosphere than the blue one while the later is more scattered in the sky. The second reason is that the knowledge acquired in understanding those phenomena serves us in the development of new measurement technologies. When the light interacts with particl ...
Tunable nonlinear fiber optics using dense noble gases
... to address this issue by increasing the density of the filling medium in the hollowcore fiber – thereby offering an unrivaled, tunable nonlinear optical system. Liquid Ar was used to fill the hollow-core of a kagomé-lattice PCF to scale up the core material nonlinearity comparable to that of fused s ...
... to address this issue by increasing the density of the filling medium in the hollowcore fiber – thereby offering an unrivaled, tunable nonlinear optical system. Liquid Ar was used to fill the hollow-core of a kagomé-lattice PCF to scale up the core material nonlinearity comparable to that of fused s ...
Recent Developments in Optofluidic Lens Technology
... density matched fluids is completely insensitive to accelerations, making such a design superior to any mechanical system with translatable solid lenses. Like oil–water density matching, covering the lens by an elastomeric membrane also provides superior stability against both gravitational distorti ...
... density matched fluids is completely insensitive to accelerations, making such a design superior to any mechanical system with translatable solid lenses. Like oil–water density matching, covering the lens by an elastomeric membrane also provides superior stability against both gravitational distorti ...
ANALOG SIGNAL PROCESSING FOR OPTICAL COHERENCE
... personally and professionally. I am grateful for the trust, encouragement and support that she has given me in the past 3.5 years. I would also like to thank her for providing me with the opportunities, which were necessary in order for me to grow as an analog IC designer. I would like to express my ...
... personally and professionally. I am grateful for the trust, encouragement and support that she has given me in the past 3.5 years. I would also like to thank her for providing me with the opportunities, which were necessary in order for me to grow as an analog IC designer. I would like to express my ...
Color-changing and color-tunable photonic bandgap fiber textiles
... lightweight nature, immunity to E&M interference, and ease of integration into textiles. Total Internal Reflection (TIR) fibers modified to emit light sideways [10] have been used to produce emissive fashion items [11], as well as backlighting panels for medical and industrial applications [12, 13] ...
... lightweight nature, immunity to E&M interference, and ease of integration into textiles. Total Internal Reflection (TIR) fibers modified to emit light sideways [10] have been used to produce emissive fashion items [11], as well as backlighting panels for medical and industrial applications [12, 13] ...
Microsphere optical device
... [0007] The quality factor Q describes the quality of oscil lators in Which damping decays photons in the oscillator. The quality factor Q corresponds to the number of oscilla tions during a lifetime of a photon in a microsphere. In some cases, Q can be mathematically described as: ...
... [0007] The quality factor Q describes the quality of oscil lators in Which damping decays photons in the oscillator. The quality factor Q corresponds to the number of oscilla tions during a lifetime of a photon in a microsphere. In some cases, Q can be mathematically described as: ...
Wavelength Conversion Using Reconfigurable Photonic
... environment, are commercially available in industry. Maybe the most common commercial entity that utilizes these sensors is the cars. Pressure sensors for measuring the tire pressure, accelerometers for activating the air bags, chemical sensors for measuring and adjusting the exhaust gas ratios for ...
... environment, are commercially available in industry. Maybe the most common commercial entity that utilizes these sensors is the cars. Pressure sensors for measuring the tire pressure, accelerometers for activating the air bags, chemical sensors for measuring and adjusting the exhaust gas ratios for ...
laser-based fibre-optic sensor for measurement of surface properties
... avoid the effects o f light source intensity variation, vibration, surface roughness and other causes o f variable reflectivity in online measurement o f engineering surfaces The through holes had 2 mm diameter and the blind holes had 3 mm diameter and a depth o f 0 6 mm A spatial resolution o f app ...
... avoid the effects o f light source intensity variation, vibration, surface roughness and other causes o f variable reflectivity in online measurement o f engineering surfaces The through holes had 2 mm diameter and the blind holes had 3 mm diameter and a depth o f 0 6 mm A spatial resolution o f app ...
Thermal and electrical properties of - Ruhr
... Different recombination processes in semiconductors are discussed. Chapter 4 reports on the experimental set-ups which are constructed during the work, such as photopyroelectric (PPE) and photocarrier radiometry (PCR). This chapter shows also numerical simulations of the photopyroelectric as well ph ...
... Different recombination processes in semiconductors are discussed. Chapter 4 reports on the experimental set-ups which are constructed during the work, such as photopyroelectric (PPE) and photocarrier radiometry (PCR). This chapter shows also numerical simulations of the photopyroelectric as well ph ...
Femtosecond Laser Pulses: Linear Properties
... within two decades after the invention of the laser the duration of the shortest pulse shrunk by six orders of magnitude from the nanosecond regime to the femtosecond regime. Nowadays femtosecond pulses in the range of 10 fs and below can be generated directly from compact and reliable laser oscilla ...
... within two decades after the invention of the laser the duration of the shortest pulse shrunk by six orders of magnitude from the nanosecond regime to the femtosecond regime. Nowadays femtosecond pulses in the range of 10 fs and below can be generated directly from compact and reliable laser oscilla ...
Optical Parametric Processes with Femtosecond
... 7.3.1. Generation of an Appropriate Signal ............................................................................ 123 7.4. Optical Parametric Amplification with Femtosecond Pulses: Theoretical Model .............. 124 7.4.1. Noncollinear Phase Matching: Broadband Amplification .............. ...
... 7.3.1. Generation of an Appropriate Signal ............................................................................ 123 7.4. Optical Parametric Amplification with Femtosecond Pulses: Theoretical Model .............. 124 7.4.1. Noncollinear Phase Matching: Broadband Amplification .............. ...
The Scintillation Index In Moderate To Strong Turbulence
... 1. For a Gaussian beam, the Rytov variance as given is not an adequate descriptor. Since weak fluctuations correspond to the entire beam profile being less than unity, we strengthen the conditions to [1] ...
... 1. For a Gaussian beam, the Rytov variance as given is not an adequate descriptor. Since weak fluctuations correspond to the entire beam profile being less than unity, we strengthen the conditions to [1] ...
Statistics of the received power for free space optical channels
... PDF of the normalized log irradiance ln(I) for a low order adaptively compensated Gaussian beam for the receiving apertures of diameter 5.6 mm(point receiver)(a), ρ0 /2 (b), ρ (c), and 3ρ /2 (d). Simulation results for turbulence strength Cn2 = 1 × 10−15 m−2/3 and propagation distance of 10 km are c ...
... PDF of the normalized log irradiance ln(I) for a low order adaptively compensated Gaussian beam for the receiving apertures of diameter 5.6 mm(point receiver)(a), ρ0 /2 (b), ρ (c), and 3ρ /2 (d). Simulation results for turbulence strength Cn2 = 1 × 10−15 m−2/3 and propagation distance of 10 km are c ...
Optical tweezers
Optical tweezers (originally called ""single-beam gradient force trap"") are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch to physically hold and move microscopic dielectric objects similar to tweezers. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.