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Fiber optics for laser cooling and trapping
... The major focus has shifted from primarily cooling down atoms as close as possible to absolute zero and towards the experimental investigation of these already cooled atoms. Fiber-optical components designed for the accomplishment of these goals assist researchers all over the world in concentrating ...
... The major focus has shifted from primarily cooling down atoms as close as possible to absolute zero and towards the experimental investigation of these already cooled atoms. Fiber-optical components designed for the accomplishment of these goals assist researchers all over the world in concentrating ...
Fabrication and Application of Phase only Holograms for High
... leads to test sample destruction. Cooling of the samples with compressed air allowed them not to be destroyed at least for 60 seconds. 4. Beam shaping with binary phase only holograms Although the ability of ITO coatings to withstand high cw power levels is crucial for the envisioned applications it ...
... leads to test sample destruction. Cooling of the samples with compressed air allowed them not to be destroyed at least for 60 seconds. 4. Beam shaping with binary phase only holograms Although the ability of ITO coatings to withstand high cw power levels is crucial for the envisioned applications it ...
High-peak-power pulse generation from a
... pulses at 1.5 μm by GS the MO of a fully integrated MOPA device. 2.7 W peak-power pulses with 100 ps duration (FWHM) and 78 ps rise time have been attained. Compound cavity effects have been evidenced, and their influence on the device performance on cw and GS operation has been studied. At low osci ...
... pulses at 1.5 μm by GS the MO of a fully integrated MOPA device. 2.7 W peak-power pulses with 100 ps duration (FWHM) and 78 ps rise time have been attained. Compound cavity effects have been evidenced, and their influence on the device performance on cw and GS operation has been studied. At low osci ...
HOLOGRAM(REFLECTION)
... the incident diverged laser beam. As indicated above, in this geometry, the film itself serves as the beam splitter with the direct beam being the reference beam and the light from the object being the object beam. Film that fits the film holder has been precut and placed in a black envelope inside ...
... the incident diverged laser beam. As indicated above, in this geometry, the film itself serves as the beam splitter with the direct beam being the reference beam and the light from the object being the object beam. Film that fits the film holder has been precut and placed in a black envelope inside ...
In the diagram below, the optical train of a set of binoculars is found
... A solid state laser utilizes a Ti:sapphire rod in which the bandwidth of the spontaneous fluorescence is 1000 GHz. Two flat cavity mirrors are glued directly to the rod to form the cavity. (a) To achieve optical gain in the laser medium, assuming there are N2 and N1 atoms (per unit volume) in the up ...
... A solid state laser utilizes a Ti:sapphire rod in which the bandwidth of the spontaneous fluorescence is 1000 GHz. Two flat cavity mirrors are glued directly to the rod to form the cavity. (a) To achieve optical gain in the laser medium, assuming there are N2 and N1 atoms (per unit volume) in the up ...
Laser phase and frequency stabilization using an optical resonator
... input frequency (phase), where by rapid we mean fast enough that the resonator's internal field is not in equilibrium with its input. One will thus be led to view the cavity resonator as a phase storage element in which the internal field represents an appropriate average over the recent phase histo ...
... input frequency (phase), where by rapid we mean fast enough that the resonator's internal field is not in equilibrium with its input. One will thus be led to view the cavity resonator as a phase storage element in which the internal field represents an appropriate average over the recent phase histo ...
Attosecond lighthouse driven by sub-two
... krypton and so it requires a higher laser field to reach the same ionization rate. This produces a higher energy cut-off for N2. In addition, the structure of the transition moment of N2 makes the high energy component relatively stronger within the N2 spectrum than is the case in Kr or Xe. We have u ...
... krypton and so it requires a higher laser field to reach the same ionization rate. This produces a higher energy cut-off for N2. In addition, the structure of the transition moment of N2 makes the high energy component relatively stronger within the N2 spectrum than is the case in Kr or Xe. We have u ...
Design study of a Magneto-Optical Trap for laser cooling of rubidium
... Rubidium is an Alkali-metal. The Alkali-metals were the first group of atoms that was cooled and trapped [1]. They have transitions from the ground state to excited states, that correspond to wavelengths in the visible or near infra red (NIR) regions. They can also easily be generated in atomic beam ...
... Rubidium is an Alkali-metal. The Alkali-metals were the first group of atoms that was cooled and trapped [1]. They have transitions from the ground state to excited states, that correspond to wavelengths in the visible or near infra red (NIR) regions. They can also easily be generated in atomic beam ...
Imaging and focusing of an atomic beam with a large period
... states but not to ground state atoms. The triplet He* atoms interact with light at 1.083 gm through the 23S1 to 23p2 transition. This light was produced by a Ti-sapphire ring laser (Coherent 899-21) pumped with 27 W from a Ar + laser. The laser was stabilized on the 23 $1 to 23p2 transition using sa ...
... states but not to ground state atoms. The triplet He* atoms interact with light at 1.083 gm through the 23S1 to 23p2 transition. This light was produced by a Ti-sapphire ring laser (Coherent 899-21) pumped with 27 W from a Ar + laser. The laser was stabilized on the 23 $1 to 23p2 transition using sa ...
Full Article PDF
... randomly perturbed; more precisely, the phase, intensity and direction of the laser wave undergo turbulent fluctuations due to random refractive index fluctuations of the medium, which are mainly caused by temperature fluctuations. We assume that the pressure variations in the hot jet spread at very hi ...
... randomly perturbed; more precisely, the phase, intensity and direction of the laser wave undergo turbulent fluctuations due to random refractive index fluctuations of the medium, which are mainly caused by temperature fluctuations. We assume that the pressure variations in the hot jet spread at very hi ...
Spectral Characteristics of Semiconductor Lasers with Optical
... must still satisfy (4) but 6 is no longer a linear function of h. This is illustrated by plots of O as a function of X for increasing levels of feedback in Fig. 2. For sufficiently small r [Fig. 2(a) and (b)], only one mode is present, but at the highest feedback level [Fig. 2(c)], (3) is satisfied ...
... must still satisfy (4) but 6 is no longer a linear function of h. This is illustrated by plots of O as a function of X for increasing levels of feedback in Fig. 2. For sufficiently small r [Fig. 2(a) and (b)], only one mode is present, but at the highest feedback level [Fig. 2(c)], (3) is satisfied ...
IOSR Journal of Applied Physics (IOSR-JAP)
... Nanotechnology concerns with the development of experimental processes for the synthesis of nanoparticles of different sizes, shapes and controlled dispersity [1] Recently, metal nano particles have been intensively studied due to widely exploited use in catalysis[2], photonics[3], optoelectronics[4 ...
... Nanotechnology concerns with the development of experimental processes for the synthesis of nanoparticles of different sizes, shapes and controlled dispersity [1] Recently, metal nano particles have been intensively studied due to widely exploited use in catalysis[2], photonics[3], optoelectronics[4 ...
Phys. Rev. Lett. 108, 197403
... through the center and the ½010 axis cf. Fig. 3(b). Averaging over this distribution for nuclei that lie within the Gaussian QD electron wave function, we obtain Anc i ’ 2:6 104 eV, consistent with [22]. The fact that H^ nc could explain dragging is at first sight surprising since its dominant ...
... through the center and the ½010 axis cf. Fig. 3(b). Averaging over this distribution for nuclei that lie within the Gaussian QD electron wave function, we obtain Anc i ’ 2:6 104 eV, consistent with [22]. The fact that H^ nc could explain dragging is at first sight surprising since its dominant ...
Atom lithography - Quantum technologies
... where the forces exerted by interfering laser beams on the atoms of an atomic beam are used to steer the atoms into nanostructures fabricated on a plane surface. While atom lithography is the most frequently used term, the method is also known as light-force lithography and atomic nanofabrication (A ...
... where the forces exerted by interfering laser beams on the atoms of an atomic beam are used to steer the atoms into nanostructures fabricated on a plane surface. While atom lithography is the most frequently used term, the method is also known as light-force lithography and atomic nanofabrication (A ...
Bose-Einstein Condensation in Cold Atoms: a New State of Matter
... laser sibling lie in the photon/atom distinction. Atoms, unlike photons, cannot be created or destroyed, so amplification of an atom laser (see figure 4)involves pumping more atoms into the ground quantum state through quantum coherence. Matter waves are also affected by gravity, as their masses are ...
... laser sibling lie in the photon/atom distinction. Atoms, unlike photons, cannot be created or destroyed, so amplification of an atom laser (see figure 4)involves pumping more atoms into the ground quantum state through quantum coherence. Matter waves are also affected by gravity, as their masses are ...
Optics and Quantum Electronics E. P. Ippen
... The carrier-envelope phase of pulses emerging from a laser is not known a priori, and it generally slips from pulse to pulse because the roundtrip phase delay in a laser is usually not the same as the roundtrip group delay. Nonlinear optical measurements that are sensitive to this carrierenvelope ph ...
... The carrier-envelope phase of pulses emerging from a laser is not known a priori, and it generally slips from pulse to pulse because the roundtrip phase delay in a laser is usually not the same as the roundtrip group delay. Nonlinear optical measurements that are sensitive to this carrierenvelope ph ...
Document
... exponentially decreases with increasing of angle. The curve’s shape is generally the same but incorporated effects reduce the value of the scattering probability on a given angle. For a better understanding of these two mentioned distributions we took two different spatial laser beam profiles, Gauss ...
... exponentially decreases with increasing of angle. The curve’s shape is generally the same but incorporated effects reduce the value of the scattering probability on a given angle. For a better understanding of these two mentioned distributions we took two different spatial laser beam profiles, Gauss ...
Application of the Sampling and Replication Operators to Describe
... duration for the pulse, which is acceptable for amplification in the active medium that has a gain curve of bandwidth . Thus, for amplification of extremely short laser pulses, the gain curve of the active medium must have the widest possible bandwidth . ...
... duration for the pulse, which is acceptable for amplification in the active medium that has a gain curve of bandwidth . Thus, for amplification of extremely short laser pulses, the gain curve of the active medium must have the widest possible bandwidth . ...
Terahertz quantum cascade lasers operating up to ∼ 200 K with
... injection and l-e for extraction) are aligned at about the same electric field. The convergence of the model towards thinner barriers is mostly driven by the maximization of population inversion, but is constrained by the gain broadening that is induced by the tunneling couplings and the parasitic l ...
... injection and l-e for extraction) are aligned at about the same electric field. The convergence of the model towards thinner barriers is mostly driven by the maximization of population inversion, but is constrained by the gain broadening that is induced by the tunneling couplings and the parasitic l ...
Light sources - University of Washington
... electrons can carry their excess energy over distance scales of microns before dissipating their energy into heat, significantly longer than is possible in metals. This effect is essential to the operation of bipolar junction transistors. Light energy conversion Electrons in a semiconductor can abso ...
... electrons can carry their excess energy over distance scales of microns before dissipating their energy into heat, significantly longer than is possible in metals. This effect is essential to the operation of bipolar junction transistors. Light energy conversion Electrons in a semiconductor can abso ...
Picosecond-resolution soft-x-ray laser plasma interferometry
... dispersion of the soft-x-ray laser on its ruled section. This IR laser diode for alignment is chosen to have a temporal coherence length similar to or shorter than that of the soft-x-ray laser 共⬃400 m 1兾e HW兲.17 This ensures that the arm lengths are matched with sufficient precision to warrant the ...
... dispersion of the soft-x-ray laser on its ruled section. This IR laser diode for alignment is chosen to have a temporal coherence length similar to or shorter than that of the soft-x-ray laser 共⬃400 m 1兾e HW兲.17 This ensures that the arm lengths are matched with sufficient precision to warrant the ...
Writing a superlattice with light forces
... (Burleigh Inchworm motor and a 3D piezo-actuator on the upper left). The light is coupled in via an optical single-mode fiber (output coupler left) which ensures a stable beam profile and position ...
... (Burleigh Inchworm motor and a 3D piezo-actuator on the upper left). The light is coupled in via an optical single-mode fiber (output coupler left) which ensures a stable beam profile and position ...
Laser wake field acceleration: the highly non
... spectrum for case (I) and even a spectrum sharply peaked in energy for the solitary acceleration bubble of case (II). We describe in Sect. 3 how the peaked spectrum is related to beamloading effects. In this paper, we can give only numerical results for a few selected cases located in the parameter ...
... spectrum for case (I) and even a spectrum sharply peaked in energy for the solitary acceleration bubble of case (II). We describe in Sect. 3 how the peaked spectrum is related to beamloading effects. In this paper, we can give only numerical results for a few selected cases located in the parameter ...
Mode-locked fiber laser gyroscope
... reflector is a function of the rotation rate or any nonreciprocal phase shift introduced between the counterpropagating waves in the Sagnac interferometer. A fiber-optic phase modulator located near one end of the fiber coil, as shown in Fig. 1(a), can be used to modulate the optical loss in the cav ...
... reflector is a function of the rotation rate or any nonreciprocal phase shift introduced between the counterpropagating waves in the Sagnac interferometer. A fiber-optic phase modulator located near one end of the fiber coil, as shown in Fig. 1(a), can be used to modulate the optical loss in the cav ...
Photonic Crystal Nanocavities for Efficient Light Confinement and
... from one cavity to another. This can be accomplished through the use of photonic crystal waveguides or by the use of self-collimating directions within the photonic crystal. We have developed the design, fabrication and characterization tools to examine light propagation between optical cavities thr ...
... from one cavity to another. This can be accomplished through the use of photonic crystal waveguides or by the use of self-collimating directions within the photonic crystal. We have developed the design, fabrication and characterization tools to examine light propagation between optical cavities thr ...
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.