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Wir schaffen Wissen – heute für morgen Paul Scherrer Institut Carlo Vicario
... – IR filters + UV shaping ...
... – IR filters + UV shaping ...
Paper
... With the realization of coherent, laserlike atoms in the form of Bose-Einstein condensates it has become possible to explore matter-wave amplification, a process in which the number of atoms in a quantum state is amplified due to bosonic stimulation. Stimulation has been observed in the formation of ...
... With the realization of coherent, laserlike atoms in the form of Bose-Einstein condensates it has become possible to explore matter-wave amplification, a process in which the number of atoms in a quantum state is amplified due to bosonic stimulation. Stimulation has been observed in the formation of ...
OPTI 511R, Spring 2015 Problem Set 8 Prof. E. M. Wright Due
... know the physics of how a laser works, but you need to assume the following: (i) Only a single longitudinal and transverse mode of the cavity will be occupied with light. (ii) One of the mirrors is just slightly transmitting, so that some of the light contained in the cavity will leak out through th ...
... know the physics of how a laser works, but you need to assume the following: (i) Only a single longitudinal and transverse mode of the cavity will be occupied with light. (ii) One of the mirrors is just slightly transmitting, so that some of the light contained in the cavity will leak out through th ...
Pulsed-source and swept-source spectral-domain optical coherence tomography with reduced motion artifacts
... readout rate. The effective signal acquisition time of the system in this case is given by the pulse duration rather than the exposure time of the camera. As a result, snap-shot A-line profiles can be obtained with freedom from sample or probe motion. This technique is conceptually similar to the us ...
... readout rate. The effective signal acquisition time of the system in this case is given by the pulse duration rather than the exposure time of the camera. As a result, snap-shot A-line profiles can be obtained with freedom from sample or probe motion. This technique is conceptually similar to the us ...
www.osa-opn.org 24 | OPN October 2008 Two positively charged
... the oscillating dipole created by the interference of the two parts of the wavefunction—the bound electron wavefunction and the re-collision electron wave packet. In other words, the XUV pulse is a replica of the re-collision electron pulse viewed through the transition moment. The bottom figure on ...
... the oscillating dipole created by the interference of the two parts of the wavefunction—the bound electron wavefunction and the re-collision electron wave packet. In other words, the XUV pulse is a replica of the re-collision electron pulse viewed through the transition moment. The bottom figure on ...
Chapter 2 Femtosecond Laser Pulses - diss.fu
... Consider now a seed beam with a Gaussian profile propagating through a nonlinear medium, e.g. a Ti:sapphire crystal, which is pumped by a cw radiation. As aforementioned, for high intensity light, due to the intensity dependent refractive index, the Kerr lens effect occurs. When the laser operates i ...
... Consider now a seed beam with a Gaussian profile propagating through a nonlinear medium, e.g. a Ti:sapphire crystal, which is pumped by a cw radiation. As aforementioned, for high intensity light, due to the intensity dependent refractive index, the Kerr lens effect occurs. When the laser operates i ...
Sample Chapter
... oxides such as B2O3, GeO2 and P2O5, core materials with higher refractive indices can be produced. Silica is used as the cladding for the core materials. Thus, the common optical fibres made of glass materials are: (i) P2O5–SiO2 core and SiO2 cladding (ii) GeO2–SiO2 core and SiO2 cladding (iii) GeO2 ...
... oxides such as B2O3, GeO2 and P2O5, core materials with higher refractive indices can be produced. Silica is used as the cladding for the core materials. Thus, the common optical fibres made of glass materials are: (i) P2O5–SiO2 core and SiO2 cladding (ii) GeO2–SiO2 core and SiO2 cladding (iii) GeO2 ...
Intersatellite laser ranging instrument for the GRACE
... One significant challenge is the removal of the temporal variations of the Earth’s gravitational field with periods shorter than one month which are aliased due to undersampling (Knudsen and Andersen 2002; Seo et al. 2008; Loomis et al. 2011). These high frequency variations can be caused by tides ( ...
... One significant challenge is the removal of the temporal variations of the Earth’s gravitational field with periods shorter than one month which are aliased due to undersampling (Knudsen and Andersen 2002; Seo et al. 2008; Loomis et al. 2011). These high frequency variations can be caused by tides ( ...
Introduction to Flow Cytometry: A Learning Guide
... fluorescent compound to be raised to a higher energy level. The excited electron quickly decays to its ground state, emitting the excess energy as a photon of light. This transition of energy is called fluorescence. The range over which a fluorescent compound can be excited is termed its absorption ...
... fluorescent compound to be raised to a higher energy level. The excited electron quickly decays to its ground state, emitting the excess energy as a photon of light. This transition of energy is called fluorescence. The range over which a fluorescent compound can be excited is termed its absorption ...
Open Frame CD/DVD Reader
... and plane wave fronts exist only at a particular point. The reason for the failure of geometrical optics is the fact that it has been introduced at a time where the wave character of light was still as unknown as the possibility to describe its behaviour by Maxwell‘s equations. To describe the propa ...
... and plane wave fronts exist only at a particular point. The reason for the failure of geometrical optics is the fact that it has been introduced at a time where the wave character of light was still as unknown as the possibility to describe its behaviour by Maxwell‘s equations. To describe the propa ...
Displacement Measuring Interferometry
... Locating the minimum in the beat frequency as function of resonator length controls the resonator length. As shown in Figure 4.10 by the dashed lines, the laser output for stabilization can be the weaker beam that exits the rear of the tube, thereby making all of the main output of the laser availab ...
... Locating the minimum in the beat frequency as function of resonator length controls the resonator length. As shown in Figure 4.10 by the dashed lines, the laser output for stabilization can be the weaker beam that exits the rear of the tube, thereby making all of the main output of the laser availab ...
10 fs ultrafast all-optical switching in polystyrene nonlinear photonic
... power of 20.6 GW/ cm2. Although the peak intensity of pump pulse is quite high, the total energy that is involved in the laser pulse is in a relatively low level due to its extremely short duration. The pump power is comparable to the value used to trigger optical switching in a silicon photonic cry ...
... power of 20.6 GW/ cm2. Although the peak intensity of pump pulse is quite high, the total energy that is involved in the laser pulse is in a relatively low level due to its extremely short duration. The pump power is comparable to the value used to trigger optical switching in a silicon photonic cry ...
Wei Zhang, Hainian Han, Yanying Zhao, Qiang Du, Zhiyi Wei. A
... octave-spanning spectrum generation, the output power steeply decreases and the frequency comb is very sensitive to alignment, noise and shock. In recent years, the great progress toward octave-spanning Ti:sapphire laser with high repetition rate [12,13] gives a way to eliminate the PCF and simplify ...
... octave-spanning spectrum generation, the output power steeply decreases and the frequency comb is very sensitive to alignment, noise and shock. In recent years, the great progress toward octave-spanning Ti:sapphire laser with high repetition rate [12,13] gives a way to eliminate the PCF and simplify ...
Measurement of the Number of Atoms in a Magneto
... Magneto-optical traps (MOTs) are used to trap neutral atoms. This is more difficult than trapping ions, since one cannot just use electric and magnetic field gradients to trap the atoms. Instead, six laser beams “push” the atoms into the center of the MOT. A magnetic field then produces a potential ...
... Magneto-optical traps (MOTs) are used to trap neutral atoms. This is more difficult than trapping ions, since one cannot just use electric and magnetic field gradients to trap the atoms. Instead, six laser beams “push” the atoms into the center of the MOT. A magnetic field then produces a potential ...
Automatic Absolute Distance Measurement with One Micrometer
... wavelength controller, monochrome camera, wavelength meter, motion controller and a computer, as is shown in Figure 2. To control the system components custom system software has been developed. This consists of several programs written in the interactive data language IDL to make the measuring syst ...
... wavelength controller, monochrome camera, wavelength meter, motion controller and a computer, as is shown in Figure 2. To control the system components custom system software has been developed. This consists of several programs written in the interactive data language IDL to make the measuring syst ...
Stimulated Raman Transitions Between Hyperfine Ground States of
... In this thesis we present an approach for coherent manipulation of the hyperfine ground states of magnetically trapped 87 Rb atoms through two-photon stimulated Raman transitions. We describe the theory behind stimulated Raman transitions in which light shifts of the hyperfine ground states manifest ...
... In this thesis we present an approach for coherent manipulation of the hyperfine ground states of magnetically trapped 87 Rb atoms through two-photon stimulated Raman transitions. We describe the theory behind stimulated Raman transitions in which light shifts of the hyperfine ground states manifest ...
Dynamics and interference of autoionizing wave packets
... first laser pulse excites the system. By choosing close to the Kepler period, Figs. 2共a兲–2共c兲, we make wave packets of comparable amplitude interfere. Wave packets from the second laser pulse coincide in time and space with the first laser pulse wave packets that have one less closed channel scatt ...
... first laser pulse excites the system. By choosing close to the Kepler period, Figs. 2共a兲–2共c兲, we make wave packets of comparable amplitude interfere. Wave packets from the second laser pulse coincide in time and space with the first laser pulse wave packets that have one less closed channel scatt ...
Rejection of two-photon fluorescence background in
... Because two-photon excited fluorescence (TPEF) is dominantly generated by ballistic (unscattered) light, TPEF microscopy maintains high resolution even within scattering media [1, 2, 3]. According to Beer’s law, the proportion of ballistic light arriving at the focus decays roughly exponentially wit ...
... Because two-photon excited fluorescence (TPEF) is dominantly generated by ballistic (unscattered) light, TPEF microscopy maintains high resolution even within scattering media [1, 2, 3]. According to Beer’s law, the proportion of ballistic light arriving at the focus decays roughly exponentially wit ...
workshop on laser-matter interaction 2010
... Backscattering for ICF target. ................................................................................. 28 Plasma expansion into a vacuum and ion acceleration .......................................... 29 Towards improving the quality of laser-produced particle sources ..................... ...
... Backscattering for ICF target. ................................................................................. 28 Plasma expansion into a vacuum and ion acceleration .......................................... 29 Towards improving the quality of laser-produced particle sources ..................... ...
- vjs.ac.vn
... The optical tweezer is used to trap the micro dielectric particle, which is embedded in a medium as gas, fluid [1, 2, 3]. Usually, the tweezers in many experiments are conducted using the CW laser. It is well known that the CW laser with the power of a few milliwatt can only produce the radiation fo ...
... The optical tweezer is used to trap the micro dielectric particle, which is embedded in a medium as gas, fluid [1, 2, 3]. Usually, the tweezers in many experiments are conducted using the CW laser. It is well known that the CW laser with the power of a few milliwatt can only produce the radiation fo ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
... Development of Control Algorithm for Ring Laser Gyroscope Step 3: A photodetector samples a picked off portion of the laser beam propagating in RLG. This signal from photodetector is amplified by amplifier. As has been pointed out, the highest frequency of interest is the frequency detected by the ...
... Development of Control Algorithm for Ring Laser Gyroscope Step 3: A photodetector samples a picked off portion of the laser beam propagating in RLG. This signal from photodetector is amplified by amplifier. As has been pointed out, the highest frequency of interest is the frequency detected by the ...
Design and analysis of a low-threshold polymer circular-grating distributed-feedback laser
... charge densities associated with lasing. Experimentally, it has been found that charge-induced absorption varies greatly between polymers. The identification of polymers well suited to being electrically pumped is a continuing challenge. In working toward that aim, it is of interest to use the uniqu ...
... charge densities associated with lasing. Experimentally, it has been found that charge-induced absorption varies greatly between polymers. The identification of polymers well suited to being electrically pumped is a continuing challenge. In working toward that aim, it is of interest to use the uniqu ...
EXPERIMENT 06 Helium Neon Laser
... neon are approximately 10 times longer as those of the pstates. An immediate population inversion between the 3s and the 2p levels will therefore be generated. The 2s level is emptied due to spontaneous emission into the 1s level. After this the neon atoms reaching their ground state again, primaril ...
... neon are approximately 10 times longer as those of the pstates. An immediate population inversion between the 3s and the 2p levels will therefore be generated. The 2s level is emptied due to spontaneous emission into the 1s level. After this the neon atoms reaching their ground state again, primaril ...
Implementation of quantum logic gates using polar molecules in
... permanent dipole moment; θ is the polar angle between the molecular axis and the external field direction. At the ultracold temperatures that we consider, the translational kinetic energy of the trapped molecules is very small and nearly harmonic within the trapping well, so the trapping energy is n ...
... permanent dipole moment; θ is the polar angle between the molecular axis and the external field direction. At the ultracold temperatures that we consider, the translational kinetic energy of the trapped molecules is very small and nearly harmonic within the trapping well, so the trapping energy is n ...
Inhibited Spontaneous Emission
... in Fig. 1(b). (It is interesting to note that the spontaneous emission rate into these modes can also be inhibited by a significant factor, greater than 4, in several frequency ranges above v, .) In principle, spontaneous emission due to quadrupole and higher-order processes can occur even when the ...
... in Fig. 1(b). (It is interesting to note that the spontaneous emission rate into these modes can also be inhibited by a significant factor, greater than 4, in several frequency ranges above v, .) In principle, spontaneous emission due to quadrupole and higher-order processes can occur even when the ...
Laser
![](https://commons.wikimedia.org/wiki/Special:FilePath/Military_laser_experiment.jpg?width=300)
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.