Optical gain in silicon nanocrystals
... was provided by pump and probe transmission measurements. An intense laser beam (pump) at 390 nm excites the sample in order to reach the population inversion needed for ampli®cation, while a weak probe signal at ,800 nm passes through the active layer of thickness d. In the presence (absence) of th ...
... was provided by pump and probe transmission measurements. An intense laser beam (pump) at 390 nm excites the sample in order to reach the population inversion needed for ampli®cation, while a weak probe signal at ,800 nm passes through the active layer of thickness d. In the presence (absence) of th ...
Efficient positronium laser excitation for antihydrogen production in a
... structure is completely different for n = 3 and for Rydberg states. As we shall see, while the first transition is marginally affected by Zeeman and Stark effects, the high n levels involved in the second transition are turned into energy bands by Stark effect, strongly affecting the physics of the ...
... structure is completely different for n = 3 and for Rydberg states. As we shall see, while the first transition is marginally affected by Zeeman and Stark effects, the high n levels involved in the second transition are turned into energy bands by Stark effect, strongly affecting the physics of the ...
Get
... femtosecond mode-locked lasers [1], [2]. Since then, these combs allowed for example the development of optical atomic clocks [3],[4], tests of possible variations of fundamental constants [5], extreme nonlinear optics [6], sensitive, high resolution and broadband spectroscopy [7],[8],[9], and high- ...
... femtosecond mode-locked lasers [1], [2]. Since then, these combs allowed for example the development of optical atomic clocks [3],[4], tests of possible variations of fundamental constants [5], extreme nonlinear optics [6], sensitive, high resolution and broadband spectroscopy [7],[8],[9], and high- ...
www.phlam.univ
... In the future, we will be improving the mode-locking of the laser, such that the initial pulsewidth is less than 100 ps. A pulsewidth of 0.5 ps could then be achieved after compression. Also, we are planning to add successive amplifiers in order to have pulse energies of a few hundred millijoules. C ...
... In the future, we will be improving the mode-locking of the laser, such that the initial pulsewidth is less than 100 ps. A pulsewidth of 0.5 ps could then be achieved after compression. Also, we are planning to add successive amplifiers in order to have pulse energies of a few hundred millijoules. C ...
Mode selective fiber Bragg gratings
... cross section of conventional fabricated FBG cannot be controlled, efficient elements could only be realized with slanted gratings.2–6 These limits can be overcome by using an ultrashort laser for FBG inscription: Because of the nonlinear absorbtion of ultrashort pulses within the femtosecond (fs) ran ...
... cross section of conventional fabricated FBG cannot be controlled, efficient elements could only be realized with slanted gratings.2–6 These limits can be overcome by using an ultrashort laser for FBG inscription: Because of the nonlinear absorbtion of ultrashort pulses within the femtosecond (fs) ran ...
Experimental Demonstration of Ground State Laser Cooling with
... motion, using only a Zeeman-split dipole transition. We also showed that the cooling mechanism has a considerable bandwidth and should thus allow us to simultaneously cool several modes of longitudinal ion motion in a linear trap. This is important for implementing quantum logical gates with trapped ...
... motion, using only a Zeeman-split dipole transition. We also showed that the cooling mechanism has a considerable bandwidth and should thus allow us to simultaneously cool several modes of longitudinal ion motion in a linear trap. This is important for implementing quantum logical gates with trapped ...
Comprehensive and reliable diagnostics for the corona of laser
... corona in Sn-based plasmas due to less opacity ...
... corona in Sn-based plasmas due to less opacity ...
Student Advanced Version
... You should have a sheet of paper labeled “Diagram 1” that shows your experimental setup. You will have a semi-circular block of jello sitting over the semicircle in the diagram. The labeled lines indicate the direction for shining your laser into the jello. The laser will be pointing into the center ...
... You should have a sheet of paper labeled “Diagram 1” that shows your experimental setup. You will have a semi-circular block of jello sitting over the semicircle in the diagram. The labeled lines indicate the direction for shining your laser into the jello. The laser will be pointing into the center ...
An Injection-Locked 674 nm Laser for Strontium-88
... kinetic energy, it is said to be in the motional ground state. For good stability and coherence times, trapped ions must be held near their motional ground state. Laser cooling decreases the kinetic energy of an ion through a process in which the ion absorbs and emits photons. When the ion is moving ...
... kinetic energy, it is said to be in the motional ground state. For good stability and coherence times, trapped ions must be held near their motional ground state. Laser cooling decreases the kinetic energy of an ion through a process in which the ion absorbs and emits photons. When the ion is moving ...
Optical fiber sensors
... Definition: convert optical signal into electrical signal Types: – p-i-n photodetector: photon-electron converter – Avalance photodetector (APD): more sensitive for high speed systems ...
... Definition: convert optical signal into electrical signal Types: – p-i-n photodetector: photon-electron converter – Avalance photodetector (APD): more sensitive for high speed systems ...
Enhanced visualization of choroidal vessels using ultrahigh
... local minimum at ~1060 nm (µ a ~0.013 mm-1 at λ = 1060 nm, as compared to µ a ~0.002 mm-1 at λ = 800 nm) and a second one at ~ 1300 nm (µ a ~0.1 mm-1 at λ = 1300 nm), meaning that power losses due to water absorption will be 48% at 1060 nm and 99.3% at ~1300 nm as compared to 10% at ~800 nm for a do ...
... local minimum at ~1060 nm (µ a ~0.013 mm-1 at λ = 1060 nm, as compared to µ a ~0.002 mm-1 at λ = 800 nm) and a second one at ~ 1300 nm (µ a ~0.1 mm-1 at λ = 1300 nm), meaning that power losses due to water absorption will be 48% at 1060 nm and 99.3% at ~1300 nm as compared to 10% at ~800 nm for a do ...
Attosecond Time-Scale Intra-atomic Phase Matching of High Harmonic Generation
... Recently, feedback control of the phase of a laser pulse has produced the optimal nonlinear chirp to selectively increase in the brightness of a particular high-harmonic order [4]. This raises the possibility of a new phase matching mechanism that allows for both enhancements and selectivity of the ...
... Recently, feedback control of the phase of a laser pulse has produced the optimal nonlinear chirp to selectively increase in the brightness of a particular high-harmonic order [4]. This raises the possibility of a new phase matching mechanism that allows for both enhancements and selectivity of the ...
LASER PHYSICS
... ground state hyperfine splitting, and for maximum effect at low optical powers each optical frequency should be resonant to its respective transition. The laser field ωP acts as a probe (read) beam, which scatters off of the two-photon coherence created by the pump beams. For non-collinear pump beam ...
... ground state hyperfine splitting, and for maximum effect at low optical powers each optical frequency should be resonant to its respective transition. The laser field ωP acts as a probe (read) beam, which scatters off of the two-photon coherence created by the pump beams. For non-collinear pump beam ...
Adjusting the Brillouin spectrum in optical fibers for slow and fast
... resonances are introduced at both wings (as described above) the delay can be further enhanced. As can be seen from Eq. (5), the delay can be determined by the gain of the loss spectra. Due to the fact that each pump laser produces a gain and a loss simultaneously, the enhancement of the gain bandwi ...
... resonances are introduced at both wings (as described above) the delay can be further enhanced. As can be seen from Eq. (5), the delay can be determined by the gain of the loss spectra. Due to the fact that each pump laser produces a gain and a loss simultaneously, the enhancement of the gain bandwi ...
Laser-based displays: a review - Optical Microsystems Laboratory
... be done with the help of thermoelectric cooling devices [13]. Other disadvantages of lasers with this architecture are the limited output power and the highly astigmatic beam. In order to obtain high power, an array of diodes is often used. Although higher power can be obtained from such an array, t ...
... be done with the help of thermoelectric cooling devices [13]. Other disadvantages of lasers with this architecture are the limited output power and the highly astigmatic beam. In order to obtain high power, an array of diodes is often used. Although higher power can be obtained from such an array, t ...
DTS0116-Optical Coatings.qxd
... designed and made for a predetermined angle of incidence (such as 0 or 45 degrees) or range of incident angles (eg. 0-20, 35-50 degrees) depending on the optical design of the device used. They are used for a variety of applications that require beam combining and separation based on wavelength. One ...
... designed and made for a predetermined angle of incidence (such as 0 or 45 degrees) or range of incident angles (eg. 0-20, 35-50 degrees) depending on the optical design of the device used. They are used for a variety of applications that require beam combining and separation based on wavelength. One ...
Effects of atmospheric turbulence on remote optimal control
... account to design robust remote control applications. A partial compensation to the effects of turbulence can be achieved by adopting control strategies based on multiplephoton interactions, as nonlinear power dependence limits higher order interactions within intense beam regions, where the origina ...
... account to design robust remote control applications. A partial compensation to the effects of turbulence can be achieved by adopting control strategies based on multiplephoton interactions, as nonlinear power dependence limits higher order interactions within intense beam regions, where the origina ...
Second-harmonic generation
... the phase-matching condition can only be reached if the polarization direction of the primary light is ordinary, while the second-harmonic light has an extra-ordinary polarization. Phase matching for the conversion 980 nm → 490 nm is then reached for rays at an angle of 24.9◦ with the c-axis, where ...
... the phase-matching condition can only be reached if the polarization direction of the primary light is ordinary, while the second-harmonic light has an extra-ordinary polarization. Phase matching for the conversion 980 nm → 490 nm is then reached for rays at an angle of 24.9◦ with the c-axis, where ...
Quantum Optics and Photonics S. Ezekiel, S. Shahriar Plasma Physics
... phase coherent with each other to a few Hz. In this section, we report on realizing this goal, using a technique where an electro-optic modulator sideband is filtered through a cavity and injected into a diode laser, in a novel configuration yielding very high feedback isolation without sacrificing ...
... phase coherent with each other to a few Hz. In this section, we report on realizing this goal, using a technique where an electro-optic modulator sideband is filtered through a cavity and injected into a diode laser, in a novel configuration yielding very high feedback isolation without sacrificing ...
Conference title, upper and lower case, bolded, 18 point
... for laser-on-silicon is to provide better tolerance to optical field transfer mechanism between III-V active layers and silicon waveguide [4]. Although active layers are realized on thicker film but are coupled to 220nm film through two-step coupling mechanism, by implementing a spot-size converter ...
... for laser-on-silicon is to provide better tolerance to optical field transfer mechanism between III-V active layers and silicon waveguide [4]. Although active layers are realized on thicker film but are coupled to 220nm film through two-step coupling mechanism, by implementing a spot-size converter ...
Manual for Diode Laser Spectroscopy
... rubidium cell. You will align the laser to provide a stable beam of light, and you will observe fluorescence in the rubidium cell indicating the absorption and re-emission of photons by the atoms in the cell. You will also familiarize with the capabilities of the laser diode controller to scan the f ...
... rubidium cell. You will align the laser to provide a stable beam of light, and you will observe fluorescence in the rubidium cell indicating the absorption and re-emission of photons by the atoms in the cell. You will also familiarize with the capabilities of the laser diode controller to scan the f ...
Electromagnetically induced transparency inside the laser cavity: Switch between first-order
... frequency is assumed to lie midway between the ground state sublevels. The phase transition is determined by the detuning, which can be controlled by a static electric or magnetic field. He predicted the switch between first-order and second-order phase transitions similar to our result, although th ...
... frequency is assumed to lie midway between the ground state sublevels. The phase transition is determined by the detuning, which can be controlled by a static electric or magnetic field. He predicted the switch between first-order and second-order phase transitions similar to our result, although th ...
lens theory - Laser Components
... 1. In designing optical systems for low divergence laser beams, the paraxial approximation is excellent as far as the positioning of the elements is concerned. However, due to diffraction, the magnifications encountered may be completely different than those calculated from geometric optics. Use the ...
... 1. In designing optical systems for low divergence laser beams, the paraxial approximation is excellent as far as the positioning of the elements is concerned. However, due to diffraction, the magnifications encountered may be completely different than those calculated from geometric optics. Use the ...
Designing Fiber Optic Systems
... Electrical to optical video converters generally have a BNC coaxial cable connector at the input and a fiber optic connector on the output. In order to get the digital bits down the fiber optic cable, a light emitting device is used, onto which the digital signal is modulated. Either a laser or an L ...
... Electrical to optical video converters generally have a BNC coaxial cable connector at the input and a fiber optic connector on the output. In order to get the digital bits down the fiber optic cable, a light emitting device is used, onto which the digital signal is modulated. Either a laser or an L ...
H. Haus
... minimum loss. Single mode fibers and their interconnections can be made with very small insertion losses. We have been able to observe 5dB squeezing using pulses at 1.3 mm3. The squeezing is limited because different temporal portions of the Gaussian pulse do not interact with each other. Each porti ...
... minimum loss. Single mode fibers and their interconnections can be made with very small insertion losses. We have been able to observe 5dB squeezing using pulses at 1.3 mm3. The squeezing is limited because different temporal portions of the Gaussian pulse do not interact with each other. Each porti ...
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.