Fabrication of Diffractive Lenses Soft X-ray with Resolution
... not directly visible with our own eyes were mainly concerned about the instruments (for instance, lens cutting and polishing were gradually improved). Light has always been a natural and powerful probe. At the present time, the resolution and the magnification achieved by optical devices are really ...
... not directly visible with our own eyes were mainly concerned about the instruments (for instance, lens cutting and polishing were gradually improved). Light has always been a natural and powerful probe. At the present time, the resolution and the magnification achieved by optical devices are really ...
Thursday, May 10, 2007
... P. Marangos1; 1Imperial College, UK, 2Univ. of Kassel, Germany, 3Advanced Laser Light Source, Canada, 4Natl. Res. Council of Canada, Canada. A technique for probing ultrafast (attosecond) structural rearrangement in molecules following laser ionization is discussed. The temporal window accessible ha ...
... P. Marangos1; 1Imperial College, UK, 2Univ. of Kassel, Germany, 3Advanced Laser Light Source, Canada, 4Natl. Res. Council of Canada, Canada. A technique for probing ultrafast (attosecond) structural rearrangement in molecules following laser ionization is discussed. The temporal window accessible ha ...
Preparation of highly visible-light active N
... actual measurement. The electron paramagnetic resonance (EPR) spectra were recorded on an X-band Bruker EMX spectrometer operating at 100 KHz field modulation and 1 mW microwave power and equipped with a high-sensitivity cavity (ER 4119HS). The g values were determined using a DPPH standard. 2.4 Pho ...
... actual measurement. The electron paramagnetic resonance (EPR) spectra were recorded on an X-band Bruker EMX spectrometer operating at 100 KHz field modulation and 1 mW microwave power and equipped with a high-sensitivity cavity (ER 4119HS). The g values were determined using a DPPH standard. 2.4 Pho ...
CRANFIELD UNIVERSITY Edouard Berrocal MULTIPLE
... ability of the technique to simulate various detection conditions, to differentiate scattering orders and to generate real images of light intensity distributions with high spatial resolution is demonstrated. The model is used for the real case of planar Mie imaging through a typical hollow cone wat ...
... ability of the technique to simulate various detection conditions, to differentiate scattering orders and to generate real images of light intensity distributions with high spatial resolution is demonstrated. The model is used for the real case of planar Mie imaging through a typical hollow cone wat ...
Biomedical Optical Imaging
... system. The light source can be either a femtosecond laser or a broadband superluminescent diode (SLD). Our earlier studies used a femtosecond Ti:Sapphire laser for ultrahigh-resolution imaging, however modern multiplexed SLD light sources can now generate very broad bandwidths and achieve axial res ...
... system. The light source can be either a femtosecond laser or a broadband superluminescent diode (SLD). Our earlier studies used a femtosecond Ti:Sapphire laser for ultrahigh-resolution imaging, however modern multiplexed SLD light sources can now generate very broad bandwidths and achieve axial res ...
Doctorat doc
... fibers in fiber optic chemical sensors systems for environmental pollution monitoring using absorption, evanescent, or diffused reflectance spectroscopy since practically all molecules posses characteristic vibration bands in the IR. Aside from chemical sensors, IR fibers can be used for magnetic fi ...
... fibers in fiber optic chemical sensors systems for environmental pollution monitoring using absorption, evanescent, or diffused reflectance spectroscopy since practically all molecules posses characteristic vibration bands in the IR. Aside from chemical sensors, IR fibers can be used for magnetic fi ...
New Approaches to Gyroscopic Lasers
... gain medium for the gyroscope. Both neodymium doped and erbium ytterbium co-doped phosphate glass lasers were constructed. Initially linear cavity designs were constructed to test the suitability of the gain media. Both laser systems employed longitudinal laser diode pumping. Thirty six perimeter ri ...
... gain medium for the gyroscope. Both neodymium doped and erbium ytterbium co-doped phosphate glass lasers were constructed. Initially linear cavity designs were constructed to test the suitability of the gain media. Both laser systems employed longitudinal laser diode pumping. Thirty six perimeter ri ...
Lab 71 in TFFM08 Fiber Optics
... The multimode fibers used for telecommunications may have a = 25 µ m and NA = 0.2 or a = 50 µ m and NA = 0.3 , so that for 633 nm light, the V-number will be about 50 or 150, respectively. This means that a large number of modes will be supported by the fiber. The amount of light carried by each mod ...
... The multimode fibers used for telecommunications may have a = 25 µ m and NA = 0.2 or a = 50 µ m and NA = 0.3 , so that for 633 nm light, the V-number will be about 50 or 150, respectively. This means that a large number of modes will be supported by the fiber. The amount of light carried by each mod ...
Light Scattering by Fractal Aggregates: A Review
... processes. Light scattering is the central theme of this review, but it is set in the context of the scattering of waves in general. This is done not only because many of the results to be described were derived from and/or can be applied to other scattering processes such as x-rays and neutrons, bu ...
... processes. Light scattering is the central theme of this review, but it is set in the context of the scattering of waves in general. This is done not only because many of the results to be described were derived from and/or can be applied to other scattering processes such as x-rays and neutrons, bu ...
POLITECNICO DI MILANO Polo Regionale di Lecco Faculty of
... power reached and pulse width are measured considering two of the main laser parameters, pumping current (which determine laser power) and pulse repetition rate as factors altering the response. These factors influence manufacturing processes such as micro drilling (with drilling time commonly in ms ...
... power reached and pulse width are measured considering two of the main laser parameters, pumping current (which determine laser power) and pulse repetition rate as factors altering the response. These factors influence manufacturing processes such as micro drilling (with drilling time commonly in ms ...
Development of a Tm3+-doped Fluoride Glass - DORAS
... 1.4.3 Solid state lasers Solid state lasers are usually based on a host crystal or glass doped with active laser ions. The first report of an operational laser was made by Maiman in 1961§. This was a ruby laser, in which chromium ions were used to emit a high intensity pulse of red light when excite ...
... 1.4.3 Solid state lasers Solid state lasers are usually based on a host crystal or glass doped with active laser ions. The first report of an operational laser was made by Maiman in 1961§. This was a ruby laser, in which chromium ions were used to emit a high intensity pulse of red light when excite ...
THE NEMATIC { SMECTIC-A PHASE TRANSITION: A HIGH
... An important development in the theory of phase transitions was the understanding of how thermal uctuations can alter the analytical properties of the free energy, modifying the critical exponents of a second-order phase transition. A second consequence, equally fundamental but less widely explored ...
... An important development in the theory of phase transitions was the understanding of how thermal uctuations can alter the analytical properties of the free energy, modifying the critical exponents of a second-order phase transition. A second consequence, equally fundamental but less widely explored ...
by ZHAOBING TIAN
... Fig. 3.12 LP1m modes in Corning SMF-28............................................................................. 46 Fig. 3.13 Connector-offset attenuator attenuation for different wavelength .......................... 46 Fig. 3.14 Different configurations of Mach-Zehnder interferometer .......... ...
... Fig. 3.12 LP1m modes in Corning SMF-28............................................................................. 46 Fig. 3.13 Connector-offset attenuator attenuation for different wavelength .......................... 46 Fig. 3.14 Different configurations of Mach-Zehnder interferometer .......... ...
TECHNICAL GUIDE
... To a very good approximation, n is the refractive index of the material. Returning to the thin film at normal incidence, the phase difference between the external and internal reflected wavefronts is given by (top/λ)x2π, where λ is the wavelength of light. Clearly, if the wavelength of the incident ...
... To a very good approximation, n is the refractive index of the material. Returning to the thin film at normal incidence, the phase difference between the external and internal reflected wavefronts is given by (top/λ)x2π, where λ is the wavelength of light. Clearly, if the wavelength of the incident ...
High Harmonic Generation for Coherent Diffractive Imaging
... where only a few harmonic orders of short wavelength or a dominant photon energy are required and any optics in the harmonic beam path, such as reflection gratings, is undesirable. The novel and flexible approach of spectral extraction based on the application of the maximum entropy method to the in ...
... where only a few harmonic orders of short wavelength or a dominant photon energy are required and any optics in the harmonic beam path, such as reflection gratings, is undesirable. The novel and flexible approach of spectral extraction based on the application of the maximum entropy method to the in ...
light sources for optical fibers
... Therefore, a pulse with a length t representing one bit of information will be lengthened to t + t. This differential time between axial and marginal rays will cause a pulse to smear and thereby limit the number of pulses per second that could be sent through a fiber and distinguished at the far e ...
... Therefore, a pulse with a length t representing one bit of information will be lengthened to t + t. This differential time between axial and marginal rays will cause a pulse to smear and thereby limit the number of pulses per second that could be sent through a fiber and distinguished at the far e ...
2 µm Laser Sources and Their Possible Applications
... systems commercially available (LISA laser products OHG; IPG Photonics Corp.). The energy level scheme of Tm3+ with the relevant energy transfer processes for this laser transition is shown in figure 2. The scheme of Tm:YAG is shown, as YAG is the most commonly used host material for thulium lasers. ...
... systems commercially available (LISA laser products OHG; IPG Photonics Corp.). The energy level scheme of Tm3+ with the relevant energy transfer processes for this laser transition is shown in figure 2. The scheme of Tm:YAG is shown, as YAG is the most commonly used host material for thulium lasers. ...
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Optical fiber cables[edit]
... protecting communications equipment in high voltage environments, such as power generation facilities, or metal communication structures prone to lightning strikes. They can also be used in environments where explosive fumes are present, without danger of ignition. Wiretapping (in this case, fiber t ...
... protecting communications equipment in high voltage environments, such as power generation facilities, or metal communication structures prone to lightning strikes. They can also be used in environments where explosive fumes are present, without danger of ignition. Wiretapping (in this case, fiber t ...
Adaptive Control of Ultrashort Laser Pulses for
... micrometer scale then generates intensities much higher than the Coulomb binding force in atoms. The radiation, that is generated during the fast recombination of field ionized electrons with an ionic core, forms energetic soft x-ray light pulses of durations below a single femtosecond. Even these s ...
... micrometer scale then generates intensities much higher than the Coulomb binding force in atoms. The radiation, that is generated during the fast recombination of field ionized electrons with an ionic core, forms energetic soft x-ray light pulses of durations below a single femtosecond. Even these s ...
Statistics of the received power for free space optical channels
... wander resulting in power fading, and sometimes complete loss of the signal. Spreading of the laser beam and jitter are also artifacts of atmospheric turbulence. To accurately predict the signal fading that occurs in a laser communication system and to get a true picture of how this affects crucial ...
... wander resulting in power fading, and sometimes complete loss of the signal. Spreading of the laser beam and jitter are also artifacts of atmospheric turbulence. To accurately predict the signal fading that occurs in a laser communication system and to get a true picture of how this affects crucial ...
Optical Parametric Processes with Femtosecond
... 3.6.1. Second-Harmonic Conversion Efficiency ....................................................................... 57 3.6.2. Second-Harmonic Characterization................................................................................. 58 3.7. Generation of the Third Harmonic by SFG ......... ...
... 3.6.1. Second-Harmonic Conversion Efficiency ....................................................................... 57 3.6.2. Second-Harmonic Characterization................................................................................. 58 3.7. Generation of the Third Harmonic by SFG ......... ...
Introduction to Diffraction Grating
... factors, some of which are listed below. Efficiency: In general, ruled gratings have a higher efficiency than holographic gratings. Applications such as fluorescence excitation and other radiation-induced reactions may require a ruled grating. Blaze Wavelength: Ruled gratings with a “sawtooth” groov ...
... factors, some of which are listed below. Efficiency: In general, ruled gratings have a higher efficiency than holographic gratings. Applications such as fluorescence excitation and other radiation-induced reactions may require a ruled grating. Blaze Wavelength: Ruled gratings with a “sawtooth” groov ...
SECOND HARMONIC GENERATION OF CHIRAL-MODIFIED SILVER NANOPARTICLES
... 2.2.2 Ultraviolet-Visible spectra ............................................................................................. 47 Results and discussion ........................................................................................................ 47 2.2.3 Infrared spectra ............... ...
... 2.2.2 Ultraviolet-Visible spectra ............................................................................................. 47 Results and discussion ........................................................................................................ 47 2.2.3 Infrared spectra ............... ...
Optical Fiber Sensors Guide
... with a focused light beam, photoinduced index changes occur only in the focal region where the light intensity is above a fairly sharply defined threshold. Therefore, the size of the region in which the refractive index changes occur can be smaller than the spot size of the focused light beam. The p ...
... with a focused light beam, photoinduced index changes occur only in the focal region where the light intensity is above a fairly sharply defined threshold. Therefore, the size of the region in which the refractive index changes occur can be smaller than the spot size of the focused light beam. The p ...