"Impulsar": New Application for High Power High Repetition Rate
... repetitively pulsed laser radiation with low repetition rates / is used. For example, for Jr ~ 0.3 kN MW-1 (this value is typical for an air-jet laser engine of 1970th.), the mass of 200 kg, and the acceleration of 10g, the required laser power should be ~ 60 MW (the energy Q ~100 g in the TNT equiv ...
... repetitively pulsed laser radiation with low repetition rates / is used. For example, for Jr ~ 0.3 kN MW-1 (this value is typical for an air-jet laser engine of 1970th.), the mass of 200 kg, and the acceleration of 10g, the required laser power should be ~ 60 MW (the energy Q ~100 g in the TNT equiv ...
Orientation of Nd3+ dipoles in yttrium aluminum garnet: Experiment
... the coupling constant between two linearly polarized orthogonal modes of a laser cavity for different cuts of the gain crystal, using a steady-state method similar to the one described in %12&. The measured coupling constant is a dimensionless ratio between cross-saturation and self-saturation coeff ...
... the coupling constant between two linearly polarized orthogonal modes of a laser cavity for different cuts of the gain crystal, using a steady-state method similar to the one described in %12&. The measured coupling constant is a dimensionless ratio between cross-saturation and self-saturation coeff ...
Catching the wave - Selected Topics in Quantum Electronics, IEEE
... was that nobody told me what to do. How could I be sure that the topic I would choose would be up to the standards of this world-renowned institution? Because of my microwave background, I got involved in taking advantage of the negative resistance of the newly discovered Esaki Tunnel Diode to make ...
... was that nobody told me what to do. How could I be sure that the topic I would choose would be up to the standards of this world-renowned institution? Because of my microwave background, I got involved in taking advantage of the negative resistance of the newly discovered Esaki Tunnel Diode to make ...
Physicists realize an atom laser, a source of coherent matter waves
... The active medium is a reservoir of atoms which are transferred to one state of the confining potential - the “lasing” mode. The reservoir can be atoms confined in other quantum states of the atom cavity or an ultraslow atomic beam. The atoms are transferred to the lasing mode either by collisions o ...
... The active medium is a reservoir of atoms which are transferred to one state of the confining potential - the “lasing” mode. The reservoir can be atoms confined in other quantum states of the atom cavity or an ultraslow atomic beam. The atoms are transferred to the lasing mode either by collisions o ...
(III) Laser Detection of Wave Motion in Solids
... able to guide light along one narrow column of a certain length in a laser medium. (For example, we can confine light using the concept of total internal reflection, as described in the following section.) Since this material along that light path can be manipulated to provide stimulated emission (b ...
... able to guide light along one narrow column of a certain length in a laser medium. (For example, we can confine light using the concept of total internal reflection, as described in the following section.) Since this material along that light path can be manipulated to provide stimulated emission (b ...
Dark Resonances From Optical Pumping to Cold Atoms and
... The previous discussion allows one to understand the variations of the fluorescence light RF emitted by the atom when the detuning δ1 = ω1 − ωeg1 of the first laser from the frequency ωeg1 of the transition e ↔ g1 is kept fixed while the other detuning δ2 = ω2 − ωeg2 is scanned (see Fig. 2a). Consi ...
... The previous discussion allows one to understand the variations of the fluorescence light RF emitted by the atom when the detuning δ1 = ω1 − ωeg1 of the first laser from the frequency ωeg1 of the transition e ↔ g1 is kept fixed while the other detuning δ2 = ω2 − ωeg2 is scanned (see Fig. 2a). Consi ...
Input
... It is an object of this invention to modulate the fre 30 The separation between energy levels E1 and E3 de quency of the coherent monochromatic light output of ?nes a spectral line of the modulating medium 11. When optical masers in accordance with signal information. a majority of the electrons of ...
... It is an object of this invention to modulate the fre 30 The separation between energy levels E1 and E3 de quency of the coherent monochromatic light output of ?nes a spectral line of the modulating medium 11. When optical masers in accordance with signal information. a majority of the electrons of ...
Phonon Laser Action in a Tunable Two-Level System
... threshold density of Nþ at line center). At a fundamental level, the scattering of the bluesupermode pump photon resembles stimulated-Brillouin scattering [15]. Even more generally, it is similar in form to parametric down-conversion, wherein the less strongly damped field in a parametrically partne ...
... threshold density of Nþ at line center). At a fundamental level, the scattering of the bluesupermode pump photon resembles stimulated-Brillouin scattering [15]. Even more generally, it is similar in form to parametric down-conversion, wherein the less strongly damped field in a parametrically partne ...
Frequency Mode Locking in Erbium Doped Fiber Laser Dhyaa . F
... partially transmitting, some of the photons are allowed to escape. They constitute the output laser beam. The intensity of the output laser beam is determined by the rate of production of excited atoms, the reflectivities of the mirrors, and certain properties of the active atoms [6]. Alignment of s ...
... partially transmitting, some of the photons are allowed to escape. They constitute the output laser beam. The intensity of the output laser beam is determined by the rate of production of excited atoms, the reflectivities of the mirrors, and certain properties of the active atoms [6]. Alignment of s ...
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 ...
Light amplificated by stimulated emission of radiation
... Depending on the geometry, there can be more or less stringent requirements on the pump beam quality. This applies mostly to end-pumped lasers. In some cases, the polarization state of the pump light is also important. Some nonisotropic gain media, such as Nd:YVO4, exhibit very different levels of a ...
... Depending on the geometry, there can be more or less stringent requirements on the pump beam quality. This applies mostly to end-pumped lasers. In some cases, the polarization state of the pump light is also important. Some nonisotropic gain media, such as Nd:YVO4, exhibit very different levels of a ...
Final program here (updated: 7/12/2013)
... For analytic solutions, the coefficients have to be related in a special way. One of the several integrable cases is the Sasa-Satsuma equation. Soliton solutions have been presented already in the original version by Sasa and Satsuma, and in the work by Mihalache et al. Heteroclinic connections have ...
... For analytic solutions, the coefficients have to be related in a special way. One of the several integrable cases is the Sasa-Satsuma equation. Soliton solutions have been presented already in the original version by Sasa and Satsuma, and in the work by Mihalache et al. Heteroclinic connections have ...
Optoelectronic Semiconductor Devices
... conduction band recombining spontaneously with a hole (missing electron) in the valence band to generate a photon. If a large number of such events should occur, relatively incoherent emission would result, since the emission time and direction would be random and the photons would not tend to contr ...
... conduction band recombining spontaneously with a hole (missing electron) in the valence band to generate a photon. If a large number of such events should occur, relatively incoherent emission would result, since the emission time and direction would be random and the photons would not tend to contr ...
A method for controlling the bandwidth of high-energy, few
... IR [8–12]. Among many interesting developments, the nonlinear optical interactions with selfphase modulation, which generate supercontinuum in the optical region using two gas-filled microstructured hollow fibres, have attracted much attention of researchers [13–16]. Here essentially nonlinear pulse ...
... IR [8–12]. Among many interesting developments, the nonlinear optical interactions with selfphase modulation, which generate supercontinuum in the optical region using two gas-filled microstructured hollow fibres, have attracted much attention of researchers [13–16]. Here essentially nonlinear pulse ...
Diffraction - Purdue Physics
... Analysis of the single slit data 1. Knowing the speed of the automatic drive and the speed of data acquisition (8510-6 m/s), you can convert digitization times measured on the computer into distances traveled by the photodiode. 2. Read your experimental data into a spreadsheet program and generate ...
... Analysis of the single slit data 1. Knowing the speed of the automatic drive and the speed of data acquisition (8510-6 m/s), you can convert digitization times measured on the computer into distances traveled by the photodiode. 2. Read your experimental data into a spreadsheet program and generate ...
Generation and application of a high-average- power polarized soft-x-ray laser beam
... discharge-pumped soft-x-ray lasers3,10,11 opens the opportunity of generating high-average-power polarized soft-xray radiation with a tabletop device. Our group has recently reported the generation of a laser average power of 3.5 mW at 46.9 nm by operating a discharge-pumped collisionally excited Ne ...
... discharge-pumped soft-x-ray lasers3,10,11 opens the opportunity of generating high-average-power polarized soft-xray radiation with a tabletop device. Our group has recently reported the generation of a laser average power of 3.5 mW at 46.9 nm by operating a discharge-pumped collisionally excited Ne ...
E. Ippen
... and fiber lasers. Recent investigations by our group into the nonlinear dynamics of such mirrors have revealed the presence of two-photon absorption (TPA) and nonlinear free-carrier absorption (FCA) at fluence levels which occur routinely in mode-locked lasers. The purpose of this study is to evalua ...
... and fiber lasers. Recent investigations by our group into the nonlinear dynamics of such mirrors have revealed the presence of two-photon absorption (TPA) and nonlinear free-carrier absorption (FCA) at fluence levels which occur routinely in mode-locked lasers. The purpose of this study is to evalua ...
Semiconductor Disk Lasers: Recent Advances in Generation of
... the laser mode to a very small gain area, in SDLs the same functionality is achieved by controlling the fundamental mode size via cavity design to have it match with the pumped area on the gain. Figure 1 shows various cavity configurations of SDLs. The simplest conventional SDL cavity has an I-shape ...
... the laser mode to a very small gain area, in SDLs the same functionality is achieved by controlling the fundamental mode size via cavity design to have it match with the pumped area on the gain. Figure 1 shows various cavity configurations of SDLs. The simplest conventional SDL cavity has an I-shape ...
Precision spectroscopy using quantum superposition of atomic levels
... superposition of two states, and in this way memory and processing capabilities of quantum computers exponentially increase with the number of qubits. Quantum entanglement is also important for quantum computation and quantum cryptography. Such states in quantum metrology significantly improve the si ...
... superposition of two states, and in this way memory and processing capabilities of quantum computers exponentially increase with the number of qubits. Quantum entanglement is also important for quantum computation and quantum cryptography. Such states in quantum metrology significantly improve the si ...
United Nations
... Use of LED substitute light source(s) is allowed and does not constitute a change of the lamp type. However lamp performances shall be tested during type approval also with the LED substitute light source. Approval of the lamp using filament light source(s) is a prerequisite for approval of the lamp ...
... Use of LED substitute light source(s) is allowed and does not constitute a change of the lamp type. However lamp performances shall be tested during type approval also with the LED substitute light source. Approval of the lamp using filament light source(s) is a prerequisite for approval of the lamp ...
Optics and Quantum Electronics - Research Laboratory of Electronics
... maintaining operation in an extreme regime (e.g., ultrabroadband, high repetition rate, and high intensity) where the lasers might suffer from huge nonlinearity, high mode-locking threshold, or thermal damage. In Ti:sapphire lasers, we have demonstrated a novel gain-matched output coupler for minimi ...
... maintaining operation in an extreme regime (e.g., ultrabroadband, high repetition rate, and high intensity) where the lasers might suffer from huge nonlinearity, high mode-locking threshold, or thermal damage. In Ti:sapphire lasers, we have demonstrated a novel gain-matched output coupler for minimi ...
Local thermal resonance control of GaInP photonic crystal
... respectively. For large thermal conductivities of the surrounding media, all heat diffuses rapidly into the ambient media reducing Dxth and the peak temperature. Gas cooling is most relevant for thermal tuning of resonances in membranes made of materials with small thermal conductivities such as Ga0 ...
... respectively. For large thermal conductivities of the surrounding media, all heat diffuses rapidly into the ambient media reducing Dxth and the peak temperature. Gas cooling is most relevant for thermal tuning of resonances in membranes made of materials with small thermal conductivities such as Ga0 ...
May2013050308
... The density and at the same time resolution can be improved by a reduction in emission wavelength of the laser diode. Infra-red laser diodes which are being affordable prices are being widely used. Nitride materials are stable at high temperatures and also chemically stable. GaN material has been ch ...
... The density and at the same time resolution can be improved by a reduction in emission wavelength of the laser diode. Infra-red laser diodes which are being affordable prices are being widely used. Nitride materials are stable at high temperatures and also chemically stable. GaN material has been ch ...
Laser pumping
Laser pumping is the act of energy transfer from an external source into the gain medium of a laser. The energy is absorbed in the medium, producing excited states in its atoms. When the number of particles in one excited state exceeds the number of particles in the ground state or a less-excited state, population inversion is achieved. In this condition, the mechanism of stimulated emission can take place and the medium can act as a laser or an optical amplifier. The pump power must be higher than the lasing threshold of the laser.The pump energy is usually provided in the form of light or electric current, but more exotic sources have been used, such as chemical or nuclear reactions.