Laser cooling below the Doppler limit by polarization - ENS-phys
... and a-) circular polarizations, the polarization vector rotates when one moves along the standing wave, but it keeps the same ellipticity. In the second case, which occurs, for example, with two counterpropagating waves with orthogonal linear polarizations, the ellipticity of the laser polarization ...
... and a-) circular polarizations, the polarization vector rotates when one moves along the standing wave, but it keeps the same ellipticity. In the second case, which occurs, for example, with two counterpropagating waves with orthogonal linear polarizations, the ellipticity of the laser polarization ...
Femtosecond laser pulse filamentation versus optical
... There are several ways to define the threshold plasma density for optical breakdown. The authors of [31] suggest two possible definitions for the breakdown density in water. This density can be defined by the appearance of vapor bubbles in the water sample, the “bubble” endpoint, or by the appearanc ...
... There are several ways to define the threshold plasma density for optical breakdown. The authors of [31] suggest two possible definitions for the breakdown density in water. This density can be defined by the appearance of vapor bubbles in the water sample, the “bubble” endpoint, or by the appearanc ...
Building a Helium — Neon Gas Laser Lab Manual Figure 1
... collars, and a ball driver Into the breadboard you will screw optical element assemblies that consist of a base, post holder, post, and the optical element itself. (see the picture below) The base is screwed to the post holder using a very short screw, and it is screwed down to the breadboard using ...
... collars, and a ball driver Into the breadboard you will screw optical element assemblies that consist of a base, post holder, post, and the optical element itself. (see the picture below) The base is screwed to the post holder using a very short screw, and it is screwed down to the breadboard using ...
Vertical Cavity Surface Emitting Laser (VCSEL) Technology
... Reflectors (DBRs). Since 1992 VCSEL has undergone extensive studies and with more efficient optical materials available for VCSEL construction, threshold currents quickly entered the submilliampere range. The two noteworthy experiments improving the threshold current and demonstrating successful ope ...
... Reflectors (DBRs). Since 1992 VCSEL has undergone extensive studies and with more efficient optical materials available for VCSEL construction, threshold currents quickly entered the submilliampere range. The two noteworthy experiments improving the threshold current and demonstrating successful ope ...
Multimode Pumping of Optical Parametric Oscillators
... where f ( r ,t ) is the factor by which the pump intensity exceeds operating at up to 5% duty cycle. These arrays were arranged in circular symmetry, around a 5-mm diameter Nd : YAG laser threshold for parametric oscillation. For a Laguerre-Gaussian beam composed of n modes, the rod. By appropriate ...
... where f ( r ,t ) is the factor by which the pump intensity exceeds operating at up to 5% duty cycle. These arrays were arranged in circular symmetry, around a 5-mm diameter Nd : YAG laser threshold for parametric oscillation. For a Laguerre-Gaussian beam composed of n modes, the rod. By appropriate ...
The List of Author`s Publications
... main problem hindering brightness scaling of diode-pumped solid-state lasers is heat generation within the laser medium, which leads to a spatial variation in temperature, and consequently internal stresses within the laser material and, in addition, deformation of the laser rod end faces due to di ...
... main problem hindering brightness scaling of diode-pumped solid-state lasers is heat generation within the laser medium, which leads to a spatial variation in temperature, and consequently internal stresses within the laser material and, in addition, deformation of the laser rod end faces due to di ...
2010_Haberberger
... picosecond pulses may be amplified efficiently at lower pressures allowing the use of largeaperture lasers. In an earlier study we showed that terawatt 40ps pulses can be obtained in a 2.5atm CO2 amplifier at an intensity of 1010W/cm2, although the collisional bandwidth-limited pulse duration is 250 ...
... picosecond pulses may be amplified efficiently at lower pressures allowing the use of largeaperture lasers. In an earlier study we showed that terawatt 40ps pulses can be obtained in a 2.5atm CO2 amplifier at an intensity of 1010W/cm2, although the collisional bandwidth-limited pulse duration is 250 ...
Construction of a Calcium Matter-Wave Interferometer
... interferometer. Chapter 3 then breaks down the individual components of the interferometer and describes their design, construction, and performance characteristics. Physical assembly and alignment of the interferometer is described in chapter 4. This is followed by an in-depth account of the electr ...
... interferometer. Chapter 3 then breaks down the individual components of the interferometer and describes their design, construction, and performance characteristics. Physical assembly and alignment of the interferometer is described in chapter 4. This is followed by an in-depth account of the electr ...
Construction of a 408 nm Laser System for Use in Ion Interferometry
... and trap the atoms. It selectively traps only the 87 Sr isotope of strontium. The trap consists of 6 red-detuned laser beams originating from the 460.8 nm laser system described in Ref. [1]. These point from each of six orthogonal directions towards the center of the MOT. The dominant cooling effect ...
... and trap the atoms. It selectively traps only the 87 Sr isotope of strontium. The trap consists of 6 red-detuned laser beams originating from the 460.8 nm laser system described in Ref. [1]. These point from each of six orthogonal directions towards the center of the MOT. The dominant cooling effect ...
Detailed Study Of AlAs-Oxidized Apertures in VCSEL Cavities for
... Some work has been done already in developing vectorial optical models for VCSEL structures. In [12], an approach is presented based on the weighted index method, but is unable to handle diffraction effects which become predominant when dealing with small devices. Similar methods are outlined in [13 ...
... Some work has been done already in developing vectorial optical models for VCSEL structures. In [12], an approach is presented based on the weighted index method, but is unable to handle diffraction effects which become predominant when dealing with small devices. Similar methods are outlined in [13 ...
Optics and Quantum Electronics—J. G. Fujimoto, H. A. Haus, E. P. Ippen, F. X. Kärtner
... from 600-1200 nm at about –30 dB below the average power level. Figure 3 shows first spectra generated directly from this laser. It shows a pronounced peak at 670 nm due to the early roll-off of the output coupler. On a logarithmic scale the octave is reached at about –30dB below the average power l ...
... from 600-1200 nm at about –30 dB below the average power level. Figure 3 shows first spectra generated directly from this laser. It shows a pronounced peak at 670 nm due to the early roll-off of the output coupler. On a logarithmic scale the octave is reached at about –30dB below the average power l ...
Electrodynamical Light Trapping Using Whispering-Gallery Resonances in Hyperbolic Cavities Chihhui Wu, Alessandro Salandrino,
... the Qrad for the spherical cavities is higher than that from the previously reported rectangular cavities [19]. It is commonly believed that the total quality factor of a LSPP resonator is limited by the intrinsic Ohmic loss. In the electrostatic limit, in which the resonator size is much smaller th ...
... the Qrad for the spherical cavities is higher than that from the previously reported rectangular cavities [19]. It is commonly believed that the total quality factor of a LSPP resonator is limited by the intrinsic Ohmic loss. In the electrostatic limit, in which the resonator size is much smaller th ...
Solids and Light instructional units in one PDF fi
... The LED is made up of a very small solid consisting of a large number of atoms which are closely packed together and interact with one another in a complex manner. When energy is supplied to the LED, these complex interactions result in the light emitting properties that you have seen. In these soli ...
... The LED is made up of a very small solid consisting of a large number of atoms which are closely packed together and interact with one another in a complex manner. When energy is supplied to the LED, these complex interactions result in the light emitting properties that you have seen. In these soli ...
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... samples is not quantized, but rather behaves as a continuous fluid. The ability to control current on the level of single electrons is feasible in mesoscopic devices, and at low enough temperatures. The theoretical possibility of current quantization has been first addressed by Thouless [1], who con ...
... samples is not quantized, but rather behaves as a continuous fluid. The ability to control current on the level of single electrons is feasible in mesoscopic devices, and at low enough temperatures. The theoretical possibility of current quantization has been first addressed by Thouless [1], who con ...
Full-Text PDF
... 5. Cavity Analysis in CW Operation In this section, we provide a detailed analysis of the optical cavity in CW: cavity stability zones, stable Gaussian modes and linear astigmatism compensation, which are critical topics for the realization of the optical cavity. A detailed description regarding the ...
... 5. Cavity Analysis in CW Operation In this section, we provide a detailed analysis of the optical cavity in CW: cavity stability zones, stable Gaussian modes and linear astigmatism compensation, which are critical topics for the realization of the optical cavity. A detailed description regarding the ...
Laser system for the Rydberg excitation of Strontium ions
... entanglement operations use the common motional modes of an ion string as a phonon data bus for information transfer. For this the motional sidebands have to be spectroscopically resolved, which limits the gate operation time since the spectral width of the exciting laser pulse has to be smaller tha ...
... entanglement operations use the common motional modes of an ion string as a phonon data bus for information transfer. For this the motional sidebands have to be spectroscopically resolved, which limits the gate operation time since the spectral width of the exciting laser pulse has to be smaller tha ...
Laser cooling of two trapped ions: Sideband cooling beyond the
... atoms for quantum information, and the interest in quantum statistics of ultracold atoms, have provided renewed interest and applications for laser cooling techniques @1#. The present goal is to laser cool several atoms to a pure quantum state ~to the motional ground state!, and experimental @2# and ...
... atoms for quantum information, and the interest in quantum statistics of ultracold atoms, have provided renewed interest and applications for laser cooling techniques @1#. The present goal is to laser cool several atoms to a pure quantum state ~to the motional ground state!, and experimental @2# and ...
Get
... cavity ringdown spectroscopy (FS-CRDS), in which the length of ringdown cavity was stabilized to an external absolute frequency reference [19, 20]. Compared to CRDS based on pulse laser sources, the CW-CRDS can achieve higher spectral resolution and also higher couple efficiency of laser intensity t ...
... cavity ringdown spectroscopy (FS-CRDS), in which the length of ringdown cavity was stabilized to an external absolute frequency reference [19, 20]. Compared to CRDS based on pulse laser sources, the CW-CRDS can achieve higher spectral resolution and also higher couple efficiency of laser intensity t ...
Femtosecond-laser-produced low-density plasmas in transparent
... Whereas the optical breakdown in gases leads to the generation of free electrons and ions, it must be noted that in condensed matter electrons are either bound to a particular molecule or they are "quasi-free" if they have sufficient kinetic energy to be able to move without being captured by local ...
... Whereas the optical breakdown in gases leads to the generation of free electrons and ions, it must be noted that in condensed matter electrons are either bound to a particular molecule or they are "quasi-free" if they have sufficient kinetic energy to be able to move without being captured by local ...
Frequency domain optical parametric amplification - few
... on grating G1 and collimation with M1, each wavelength is focused to a 200 mm spot size in the FP. This spot size in combination with grating dispersion and focal length of M1 define the seed pulse duration in the FP, which is about 1.4ps as explained in the Methods section and supplementary Fig. 2. ...
... on grating G1 and collimation with M1, each wavelength is focused to a 200 mm spot size in the FP. This spot size in combination with grating dispersion and focal length of M1 define the seed pulse duration in the FP, which is about 1.4ps as explained in the Methods section and supplementary Fig. 2. ...
253.pdf
... characteristics is that the total carrier density 共n = n+ + n−兲 continues to increase even after the device has started lasing for n = nth,spin = nth / 共1 + ⌸s兲 which is the threshold carrier density for a spin laser. In contrast, the carrier density gets clamped at nth in a conventional laser. It i ...
... characteristics is that the total carrier density 共n = n+ + n−兲 continues to increase even after the device has started lasing for n = nth,spin = nth / 共1 + ⌸s兲 which is the threshold carrier density for a spin laser. In contrast, the carrier density gets clamped at nth in a conventional laser. It i ...
An Injection-Locked 674 nm Laser for Strontium-88
... scalable device which can store and manipulate quantum information. Trapped ions can be used as excellent qubits due to their long coherence time and ease of control with lasers. An ion trapping system can be scaled up to include many trapped ions [KMW02]. Individual ions in a linear ion trap can be ...
... scalable device which can store and manipulate quantum information. Trapped ions can be used as excellent qubits due to their long coherence time and ease of control with lasers. An ion trapping system can be scaled up to include many trapped ions [KMW02]. Individual ions in a linear ion trap can be ...
Donor Binding Energy in GaAs/Ga1−x AlxAs Quantum Well: the
... this phenomenon have been explained in Fig. 1. In particular, in Fig. 2(a), for impurity located at Zi = L/2, the donor binding energy first slowly increases, reaching a maximum value, and then decreases. This feature is due to the large value of the electron and impurity separation at α0 = 0, follo ...
... this phenomenon have been explained in Fig. 1. In particular, in Fig. 2(a), for impurity located at Zi = L/2, the donor binding energy first slowly increases, reaching a maximum value, and then decreases. This feature is due to the large value of the electron and impurity separation at α0 = 0, follo ...
An ultrafast reconfigurable nanophotonic switch using
... particular configuration the suppression of the shaped field beginning around zero time delay with a maximum effect of (20±2)% at 3.5 ps. For optimization with pump on, we find that the dynamics of the peak to background ratio strongly depend on the exact timing of the pump and probe pulses used dur ...
... particular configuration the suppression of the shaped field beginning around zero time delay with a maximum effect of (20±2)% at 3.5 ps. For optimization with pump on, we find that the dynamics of the peak to background ratio strongly depend on the exact timing of the pump and probe pulses used dur ...
Stimulated Raman Transitions Between Hyperfine Ground States of
... Coherent control of two-state quantum systems has been subject to many recent studies, both theoretical and experimental. Applications range from atomic clocks and magnetometers to the more popularized advances in quantum information processing. The subject discussed in this thesis concerns mostly t ...
... Coherent control of two-state quantum systems has been subject to many recent studies, both theoretical and experimental. Applications range from atomic clocks and magnetometers to the more popularized advances in quantum information processing. The subject discussed in this thesis concerns mostly t ...
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.