Far-infrared Rydberg-Rydberg transitions in a magnetic field: Deexcitation of antihydrogen atoms
... The far infrared beam is focused to a spot size of 3 mm2 by a parabolic mirror with f = 20 cm into the reaction region. Because of the presence of water absorption lines in the scanning region, the far infrared beam was transported through a system of vacuum tubes to the electron spectrometer. The f ...
... The far infrared beam is focused to a spot size of 3 mm2 by a parabolic mirror with f = 20 cm into the reaction region. Because of the presence of water absorption lines in the scanning region, the far infrared beam was transported through a system of vacuum tubes to the electron spectrometer. The f ...
74, 042316 (2006)
... of light, ⌫ j is the decay rate of excited state 兩j典, cij is the transition coefficient, ij is the frequency, and ⌬ij is the detuning of the focused laser for the transition 兩i典 → 兩j典. Different polarizations and detunings of the focused laser yield different shifts of hyperfine splittings 兩⌬E共r兲 兩 ...
... of light, ⌫ j is the decay rate of excited state 兩j典, cij is the transition coefficient, ij is the frequency, and ⌬ij is the detuning of the focused laser for the transition 兩i典 → 兩j典. Different polarizations and detunings of the focused laser yield different shifts of hyperfine splittings 兩⌬E共r兲 兩 ...
Laser Chemistry Emeritus Group - Max Planck Institut für Quantenoptik
... the interplay between electronic transitions and nuclear dynamics at unprecedented time-scales. For such studies we have developed and extended some new and interesting spectroscopic techniques, with the advantage to exclude focal averaging effects in laser-matter interaction. We have also demonstra ...
... the interplay between electronic transitions and nuclear dynamics at unprecedented time-scales. For such studies we have developed and extended some new and interesting spectroscopic techniques, with the advantage to exclude focal averaging effects in laser-matter interaction. We have also demonstra ...
Materials processing with a tightly focused femtosecond laser vortex
... references therein). So far, none of the proposed compensation techniques have been tested or used in laser micromachining. Recently we have synthesized high-quality doublecharge femtosecond vortex beams by using polarization singularities associated with the beam propagation in uniaxial birefringen ...
... references therein). So far, none of the proposed compensation techniques have been tested or used in laser micromachining. Recently we have synthesized high-quality doublecharge femtosecond vortex beams by using polarization singularities associated with the beam propagation in uniaxial birefringen ...
Optoelectronic Semiconductor Devices
... Instead, the energy is dissipated as heat in the semiconductor crystal lattice.These effects are to be avoided if possible. In practice, there are two general non radiative mechanisms for carriers: 1. non radiative recombination centers, such as point defects, surfaces and interfaces in the active r ...
... Instead, the energy is dissipated as heat in the semiconductor crystal lattice.These effects are to be avoided if possible. In practice, there are two general non radiative mechanisms for carriers: 1. non radiative recombination centers, such as point defects, surfaces and interfaces in the active r ...
Light fan driven by relativistic laser pulse
... can be transported to a small volume in very short time. The twisted light with strongest torque by far can be found in twisted laser driven HHG experiments. In the experiments of Zurch et al. [21], a 800 nm laser is reflected from the spatial light modulator to obtain a twisted light with peaking i ...
... can be transported to a small volume in very short time. The twisted light with strongest torque by far can be found in twisted laser driven HHG experiments. In the experiments of Zurch et al. [21], a 800 nm laser is reflected from the spatial light modulator to obtain a twisted light with peaking i ...
(DPSS) Lasers - Society of Education
... 1. User induced damage (such as mechanical, thermal or electrical shock or electrostatic discharge). 2. Intrinsic damage, which results from three main sources: (i) degradation of laser mirrors or facets because of high current densities or current spikes. This will increase internal losses and lead ...
... 1. User induced damage (such as mechanical, thermal or electrical shock or electrostatic discharge). 2. Intrinsic damage, which results from three main sources: (i) degradation of laser mirrors or facets because of high current densities or current spikes. This will increase internal losses and lead ...
Phys. Rev. Lett. 102, 223901 (2009)
... alternated using a chopper at 100 Hz, and for each data point the fluorescence counts for both situations are recorded. The fluorescence signal detected at 397 nm will now be unaffected by the presence of the comb laser for the periods where the 854 nm repumper is present (‘‘repumper on’’ in the upp ...
... alternated using a chopper at 100 Hz, and for each data point the fluorescence counts for both situations are recorded. The fluorescence signal detected at 397 nm will now be unaffected by the presence of the comb laser for the periods where the 854 nm repumper is present (‘‘repumper on’’ in the upp ...
PDF only - at www.arxiv.org.
... the Raman wavelength will correspond to 1250 nm. The pump pulse (10 kJ, 20 ps, 1050 nm) and the seed (signal) pulse of ~10-20 fs duration at 1250 nm collides in a L ~ 3 mm long plasma cell corresponding to Tp x c/2. Tp is the pump pulse duration and c the speed of light in the plasma. The pulse inte ...
... the Raman wavelength will correspond to 1250 nm. The pump pulse (10 kJ, 20 ps, 1050 nm) and the seed (signal) pulse of ~10-20 fs duration at 1250 nm collides in a L ~ 3 mm long plasma cell corresponding to Tp x c/2. Tp is the pump pulse duration and c the speed of light in the plasma. The pulse inte ...
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... laser to obtain images of corneal cells as well as information about the dimensions of the basal epithelial and endothelial cells. The endothelium is the deepest cellular layer of the cornea. It is in direct contact with the aqueous humour and represents the most important contributing layer to corn ...
... laser to obtain images of corneal cells as well as information about the dimensions of the basal epithelial and endothelial cells. The endothelium is the deepest cellular layer of the cornea. It is in direct contact with the aqueous humour and represents the most important contributing layer to corn ...
How to realize a universal quantum gate with trapped ions
... is the efficient algorithm for the factorization of large numbers [2] which threatens the security of the commonly used RSA-encryption scheme. Furthermore, efficient quantum algorithms exist for searching entries in an unsorted data base [3], for simulating quantum spin systems [4], and for quantum ...
... is the efficient algorithm for the factorization of large numbers [2] which threatens the security of the commonly used RSA-encryption scheme. Furthermore, efficient quantum algorithms exist for searching entries in an unsorted data base [3], for simulating quantum spin systems [4], and for quantum ...
Ionization of high-lying states of the sodium atom by a pulsed
... field intensity i s increased to the critical value, the signal increases slightly. When the critical value i s reached, the signal increases abruptly by three-four orders of magnitude. Further increase of the electric field intensity leads to saturation of the ion signal. The D state is characteriz ...
... field intensity i s increased to the critical value, the signal increases slightly. When the critical value i s reached, the signal increases abruptly by three-four orders of magnitude. Further increase of the electric field intensity leads to saturation of the ion signal. The D state is characteriz ...
The Femtosecond Frequency Comb: From
... slit (similar to the spectrum in Fig.1c). If one now has an infinite array of slits such as a grating, the interference peaks in the far-field will become very sharp. The different diffraction peaks correspond to the different diffraction orders of the grating. This is why the resolving power of a g ...
... slit (similar to the spectrum in Fig.1c). If one now has an infinite array of slits such as a grating, the interference peaks in the far-field will become very sharp. The different diffraction peaks correspond to the different diffraction orders of the grating. This is why the resolving power of a g ...
High-resolution broadband (>100 cm ) infrared heterodyne spectro
... Thermal IR laser heterodyne systems were pioneered using CO2 lasers as optical local oscillators (LO) [3]. The development of mid-infrared quantum cascade lasers (QCLs) [4] has offered new opportunities for IR LHR developments. QCLs exhibit high continuous wave output power (50 mW and above), single ...
... Thermal IR laser heterodyne systems were pioneered using CO2 lasers as optical local oscillators (LO) [3]. The development of mid-infrared quantum cascade lasers (QCLs) [4] has offered new opportunities for IR LHR developments. QCLs exhibit high continuous wave output power (50 mW and above), single ...
Method for compensation of thermally induced modal
... of refraction. The indices of refraction of most optical materials increase with increasing temperature, resulting in the formation of a positive lens. The spherical part of the lens will focus the beam and change the mode matching into the main interferometer. The non-spherical part introduces high ...
... of refraction. The indices of refraction of most optical materials increase with increasing temperature, resulting in the formation of a positive lens. The spherical part of the lens will focus the beam and change the mode matching into the main interferometer. The non-spherical part introduces high ...
Design and performance of a dual-laser
... of instruments to measure gases in trace amounts enjoy full access to the wavelengths where those measurements can be made with the greatest sensitivity. Many small molecules have their strongest absorption lines in the spectral region between ~3 and 10 μm, the spectral region spanned by QCL's and ...
... of instruments to measure gases in trace amounts enjoy full access to the wavelengths where those measurements can be made with the greatest sensitivity. Many small molecules have their strongest absorption lines in the spectral region between ~3 and 10 μm, the spectral region spanned by QCL's and ...
Laser Frequency and Time 1 Introduction
... simplest case, such a laser consists just of the laser crystal and two mirrors forming a cavity. The crystal acts as an optical Kerr medium with an intensity-dependent refractive index. A laser pulse with a Gaussian beam profile will thus create a lens that focuses the light at some location in the ...
... simplest case, such a laser consists just of the laser crystal and two mirrors forming a cavity. The crystal acts as an optical Kerr medium with an intensity-dependent refractive index. A laser pulse with a Gaussian beam profile will thus create a lens that focuses the light at some location in the ...
A Laser Module for 100Gbps Digital Coherent Optical Transmission System
... highly stable DFB (distributed feedback) LD. The light emitted from the front side (output side of the laser module) of the wavelength tunable LD passes through a lens where it is coupled to the optical fiber. The light emitted at the rear side (opposite side) enters the rear-side wavelength monitor ...
... highly stable DFB (distributed feedback) LD. The light emitted from the front side (output side of the laser module) of the wavelength tunable LD passes through a lens where it is coupled to the optical fiber. The light emitted at the rear side (opposite side) enters the rear-side wavelength monitor ...
Chapter 2
... 2. Polarization-independent loss 3. Low temperature coefficient 4. Reasonable broad passbands 5. Sharp passband skirts ...
... 2. Polarization-independent loss 3. Low temperature coefficient 4. Reasonable broad passbands 5. Sharp passband skirts ...
Optical generation and detection of elastic waves in solids
... system for material inspection. In the field of nondestructive testing, the thermoelastic regime is needed to avoid any surface damage and the low induced amplitude makes optical detection difficult. Recently, techniques that use an array of thermoelastic sources have been proposed. Results obtained ...
... system for material inspection. In the field of nondestructive testing, the thermoelastic regime is needed to avoid any surface damage and the low induced amplitude makes optical detection difficult. Recently, techniques that use an array of thermoelastic sources have been proposed. Results obtained ...
Direct Laser Writing: Versatile Tool for Microfabrication of Lithium
... optical image shown in Fig. 4(a). While elongation of the focus limits the axial resolution of DLW, it may be helpful for fast fabrication of thick DOEs. Precise reason for such elongation is not clear at the moment, but is likely related to strong, spatially varying optical nonlinearity of photoexc ...
... optical image shown in Fig. 4(a). While elongation of the focus limits the axial resolution of DLW, it may be helpful for fast fabrication of thick DOEs. Precise reason for such elongation is not clear at the moment, but is likely related to strong, spatially varying optical nonlinearity of photoexc ...
Short-pulse limits in optical instrumentation design for the S
... We can summarize the basic results of our investigation as follows: 1) with regard to diffraction-limited performance strongly dispersive optics will tend to be ineffective over the leading and trailing edges of the full LCLS pulse - more than half the pulse energy could easily be excluded from the ...
... We can summarize the basic results of our investigation as follows: 1) with regard to diffraction-limited performance strongly dispersive optics will tend to be ineffective over the leading and trailing edges of the full LCLS pulse - more than half the pulse energy could easily be excluded from the ...
Developing 100 ps-resolved X-ray structural
... gap of U36 is wider than 18 mm, one of two graphite heat absorbers can be removed from the beam path because the heat load on the monochromator is relatively low. The spectrum from U20, which has a smooth energy distribution in the energy range 13–18 keV, is useful for experiments using a white beam ...
... gap of U36 is wider than 18 mm, one of two graphite heat absorbers can be removed from the beam path because the heat load on the monochromator is relatively low. The spectrum from U20, which has a smooth energy distribution in the energy range 13–18 keV, is useful for experiments using a white beam ...
Pulsed Energy-Time Entangled Twin
... 41 kHz containing 40 kHz dark counts. We record threefold coincidences between the two detectors and the laser pulser within a 500 ps window. The inset in Fig. 2 shows the results of a first experiment in which both twin photons are directed to the same analyzer [12]. We characterize our source by m ...
... 41 kHz containing 40 kHz dark counts. We record threefold coincidences between the two detectors and the laser pulser within a 500 ps window. The inset in Fig. 2 shows the results of a first experiment in which both twin photons are directed to the same analyzer [12]. We characterize our source by m ...
View/Open - Dora.dmu.ac.uk
... terms in its definition such as diffraction and interference. The main focus of this paper is to briefly explain these terms using analogies and discuss the construction details of the CυBE. The CυBE has got a vast number of applications in Display Holography. In academia there is an increasing dema ...
... terms in its definition such as diffraction and interference. The main focus of this paper is to briefly explain these terms using analogies and discuss the construction details of the CυBE. The CυBE has got a vast number of applications in Display Holography. In academia there is an increasing dema ...
Laser
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term ""laser"" originated as an acronym for ""light amplification by stimulated emission of radiation"". The first laser was built in 1960 by Theodore H. Maiman at Hughes Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light coherently. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum, i.e., they can emit a single color of light. Temporal coherence can be used to produce pulses of light as short as a femtosecond.Among their many applications, lasers are used in optical disk drives, laser printers, and barcode scanners; fiber-optic and free-space optical communication; laser surgery and skin treatments; cutting and welding materials; military and law enforcement devices for marking targets and measuring range and speed; and laser lighting displays in entertainment.