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What is total internal reflection?
... • wavelength (and what it means in the visible range) • electromagnetic waves and electromagnetic spectrum • reflection, refraction • describe and predict image ...
... • wavelength (and what it means in the visible range) • electromagnetic waves and electromagnetic spectrum • reflection, refraction • describe and predict image ...
laser
... Laser-Compton scattering experiments, as an alternative schemes for polarized positron source of ILC, have a good potential to be expanded into very wide, various, and interesting field. For example, not only for physics and accelerator applications, medical and industrial applications are expected. ...
... Laser-Compton scattering experiments, as an alternative schemes for polarized positron source of ILC, have a good potential to be expanded into very wide, various, and interesting field. For example, not only for physics and accelerator applications, medical and industrial applications are expected. ...
Lasers-An Overview
... Chemical : Some lasers require hazardous or toxic substances to operate (i.e., chemical dye, Excimer lasers). Electrical : Most lasers utilize high voltages that can be lethal. Fire : Solvents used in dye lasers are flammable. High voltage pulse or flash lamps may cause ignition. ...
... Chemical : Some lasers require hazardous or toxic substances to operate (i.e., chemical dye, Excimer lasers). Electrical : Most lasers utilize high voltages that can be lethal. Fire : Solvents used in dye lasers are flammable. High voltage pulse or flash lamps may cause ignition. ...
Lecture 17
... This achieves population inversion and the recombination leads to emission. The emitted light is reflected by the mirrors at the end of the device and the inactive regions, with their lower refractive index, confine the light within the active region. The light intensity is proportional to the forwa ...
... This achieves population inversion and the recombination leads to emission. The emitted light is reflected by the mirrors at the end of the device and the inactive regions, with their lower refractive index, confine the light within the active region. The light intensity is proportional to the forwa ...
The Photoelectric Effect
... Monochromatic light (in this case produced by a broadband mercury lamp passing through a wavelengthselective interference filter) is incident on the cathode K of the photocell. This is typically made from potassium. This causes electrons to be liberated from the cathode, which then flow to ground vi ...
... Monochromatic light (in this case produced by a broadband mercury lamp passing through a wavelengthselective interference filter) is incident on the cathode K of the photocell. This is typically made from potassium. This causes electrons to be liberated from the cathode, which then flow to ground vi ...
Barium Ions for Quantum Computation
... two ions just recently in Yb+ [20]. At present, the distance of entanglement is partly limited by the length that short wavelengths of light travel through an optical fiber, another potential advantage of Ba+ , since its cooling wavelength is longer than these other examples. The ability to remotely ...
... two ions just recently in Yb+ [20]. At present, the distance of entanglement is partly limited by the length that short wavelengths of light travel through an optical fiber, another potential advantage of Ba+ , since its cooling wavelength is longer than these other examples. The ability to remotely ...
THE PHOTOELECTRIC EFFECT
... function of potassium is 2.24 eV, but there are other sources of voltage in the experiment, such as contact potentials of dissimilar metals, that may distort this value. The collector is a circular wire constructed so that a light beam can hit the center of the emitter without also hitting the colle ...
... function of potassium is 2.24 eV, but there are other sources of voltage in the experiment, such as contact potentials of dissimilar metals, that may distort this value. The collector is a circular wire constructed so that a light beam can hit the center of the emitter without also hitting the colle ...
Microwave frequency generation using a dual
... sensing [3]. Dual-mode lasers are also of interest for their potential in generating radio-frequency signals for microwave applications. Radio-frequency (RF) beat signal has been demonstrated previously in dual wavelength lasers [4 -5]. Short-cavity DBR fiber lasers are attractive devices for these ...
... sensing [3]. Dual-mode lasers are also of interest for their potential in generating radio-frequency signals for microwave applications. Radio-frequency (RF) beat signal has been demonstrated previously in dual wavelength lasers [4 -5]. Short-cavity DBR fiber lasers are attractive devices for these ...
Monolithic, unidirectional single
... the field removed, oscillation occurs in five axial modes. The free spectral range of the interferometer is 1 cm t 1; mode spacing is 0.064 cm- 1 . ...
... the field removed, oscillation occurs in five axial modes. The free spectral range of the interferometer is 1 cm t 1; mode spacing is 0.064 cm- 1 . ...
OPTI 511R, Spring 2015 Problem Set 10 Prof. E. M. Wright Due
... Doppler cooling utilizes the scattering force to remove kinetic energy from a gas of atoms via momentum removal from the atoms, thus cooling atoms. Consider an atom moving in the −kˆ direction, opposite to the propagation direction of a laser beam. The scattering force will push the atom in the +kˆ ...
... Doppler cooling utilizes the scattering force to remove kinetic energy from a gas of atoms via momentum removal from the atoms, thus cooling atoms. Consider an atom moving in the −kˆ direction, opposite to the propagation direction of a laser beam. The scattering force will push the atom in the +kˆ ...
Photonic band structure and emission characteristics of a metal-backed
... The strong correlation between device PL and reflectivity is due to the influence of first order Bragg scattering on both processes. Similar correlation has been observed between the emission from, and the transmission through, a DFB laser fabricated on a silica substrate.8 In both cases the device ...
... The strong correlation between device PL and reflectivity is due to the influence of first order Bragg scattering on both processes. Similar correlation has been observed between the emission from, and the transmission through, a DFB laser fabricated on a silica substrate.8 In both cases the device ...
Efficient yellow-green light generation at 561 nm by frequency
... In recent years, several laser sources generating visible light in periodically poled lithium niobate waveguide crystals have been demonstrated. In particular, blue light generation with output power up to 189 mW [21] and conversion efficiency up to 52% [22] by SHG in a PPLN waveguide has been obtai ...
... In recent years, several laser sources generating visible light in periodically poled lithium niobate waveguide crystals have been demonstrated. In particular, blue light generation with output power up to 189 mW [21] and conversion efficiency up to 52% [22] by SHG in a PPLN waveguide has been obtai ...
QOLECTURE1
... and spontaneous emission from state 2 if an atom is left for long enough in an excited state it will naturally (spontaneously) emit energy The emission rate - A21 (known as Einstein's A coefficient), so that the total number of atoms spontaneously emitting per unit of time is A21N2 (N2 is the No. of ...
... and spontaneous emission from state 2 if an atom is left for long enough in an excited state it will naturally (spontaneously) emit energy The emission rate - A21 (known as Einstein's A coefficient), so that the total number of atoms spontaneously emitting per unit of time is A21N2 (N2 is the No. of ...
Experiment 3 1 The Michelson Interferometer and the He
... With a population inversion, incident photons of energy E2 – E1 from some other atom can cause stimulated emission from state 2 to state 1. With stimulated emission, the incident photon will trigger ...
... With a population inversion, incident photons of energy E2 – E1 from some other atom can cause stimulated emission from state 2 to state 1. With stimulated emission, the incident photon will trigger ...
Optically-Pumped SESAM for Fast Switching between Continuous Wave and
... • Actively mode locked lasers have demonstrated this type of regime change, but the electronic modulators required for this complicate the system and add cost to the overall setup. Mechanical methods have been implemented to switch between cw and femtosecond operation of passively mode locked system ...
... • Actively mode locked lasers have demonstrated this type of regime change, but the electronic modulators required for this complicate the system and add cost to the overall setup. Mechanical methods have been implemented to switch between cw and femtosecond operation of passively mode locked system ...
THE PHOTOELECTRIC EFFECT
... function of potassium is 2.24 eV, but there are other sources of voltage in the experiment, such as contact potentials of dissimilar metals, that may distort this value. The collector is a circular wire constructed so that a light beam can hit the center of the emitter without also hitting the colle ...
... function of potassium is 2.24 eV, but there are other sources of voltage in the experiment, such as contact potentials of dissimilar metals, that may distort this value. The collector is a circular wire constructed so that a light beam can hit the center of the emitter without also hitting the colle ...
1. Which of the following statement are true about "LED life" term?
... A measure related to the refractive index of the core and cladding Related to half angle of a ray’s “cone” of acceptance 4. Because of the operating properties of the LED: LEDs are typically suitable for systems using multimode fibers LEDs are typically suitable for systems using monomode fibers It ...
... A measure related to the refractive index of the core and cladding Related to half angle of a ray’s “cone” of acceptance 4. Because of the operating properties of the LED: LEDs are typically suitable for systems using multimode fibers LEDs are typically suitable for systems using monomode fibers It ...
Laser Selective Chemistry: A New Challenge for
... atom spontaneously emits a photon, which hits another excited atom, causing it to emit another photon of the same frequency and direction. While photons emitted in wrong directions will leave the lasing medium. those perpendicular to the mirrors will be "trapped," bouncing back and forth between the ...
... atom spontaneously emits a photon, which hits another excited atom, causing it to emit another photon of the same frequency and direction. While photons emitted in wrong directions will leave the lasing medium. those perpendicular to the mirrors will be "trapped," bouncing back and forth between the ...
Introduction, Introduction to lasers, Properties of light
... if the photon is absorbed – neither of the detectors clicks if the photon takes the other path – at the last bs it has an equal chance to be transmitted or reflected – the two detectors click with equal frequencies - the interference has been destroyed by the presence of the absorber the presence of ...
... if the photon is absorbed – neither of the detectors clicks if the photon takes the other path – at the last bs it has an equal chance to be transmitted or reflected – the two detectors click with equal frequencies - the interference has been destroyed by the presence of the absorber the presence of ...
All solid-state continuous wave tunable blue light source by
... M1 (highly ref lective for 760–960 nm, antiref lective for 670 nm) was directly coated on the Cr:LiSAF crystal. The second, M2, was a curved mirror (highly ref lective for 800–900 nm) with a radius of curvature of 150 mm. The third was a plane output coupler with 1% transmission between 800 and 900 ...
... M1 (highly ref lective for 760–960 nm, antiref lective for 670 nm) was directly coated on the Cr:LiSAF crystal. The second, M2, was a curved mirror (highly ref lective for 800–900 nm) with a radius of curvature of 150 mm. The third was a plane output coupler with 1% transmission between 800 and 900 ...
Loss measurements on semiconductor lasers by
... Q factor of the cavity is already high, and the shape of the individual FP modes is closer to a series of Dirac–delta functions than to a sine function. Moreover, when choosing a logarithmic scale for the y axis, there appears to be a unique ratio between the height of the adjacent peaks in the tran ...
... Q factor of the cavity is already high, and the shape of the individual FP modes is closer to a series of Dirac–delta functions than to a sine function. Moreover, when choosing a logarithmic scale for the y axis, there appears to be a unique ratio between the height of the adjacent peaks in the tran ...
Operating characteristics of a semiconducting polymer laser pumped G. A. Turnbull
... highest. Lasing occurred only on one side of the stopband because of a substantial difference in output coupling losses of the modes at each band edge.6,11 The standing wave field at the long-wavelength band edge is poorly coupled to radiation, and so has a lower lasing threshold than the shortwavel ...
... highest. Lasing occurred only on one side of the stopband because of a substantial difference in output coupling losses of the modes at each band edge.6,11 The standing wave field at the long-wavelength band edge is poorly coupled to radiation, and so has a lower lasing threshold than the shortwavel ...
Comment on ""Electromagnetic Wave Dynamics in Matter- Wave Superradiant Scattering" Please share
... The Letter by Deng et al. [1] presents an analytic theoretical description of matter-wave superradiance [2] which claims to go beyond previous theoretical frameworks. I show here that the theory presented in this Letter is not a description of superradiance per se, but rather an elegant perturbative ...
... The Letter by Deng et al. [1] presents an analytic theoretical description of matter-wave superradiance [2] which claims to go beyond previous theoretical frameworks. I show here that the theory presented in this Letter is not a description of superradiance per se, but rather an elegant perturbative ...
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.