Optics and Quantum Electronics - Research Laboratory of Electronics
... mirrors developed in our group, provide high reflectivity and well controlled dispersion over 400 nm in the case of single mirrors or even over one octave using specially matched mirror pairs. These components are a prerequisite for miniaturized ultrabroadband femtosecond lasers necessary for biomed ...
... mirrors developed in our group, provide high reflectivity and well controlled dispersion over 400 nm in the case of single mirrors or even over one octave using specially matched mirror pairs. These components are a prerequisite for miniaturized ultrabroadband femtosecond lasers necessary for biomed ...
Construction of a Calcium Matter-Wave Interferometer
... with the skills I have developed pursuing this research. I would like to acknowledge several of the people who have helped and inspired me throughout my education. Among them are Dr. Allred, Dr. Davis, Dr. Hirschmann, and Dr. Nielsen all of whom exhibited an interest and excitement in physics that I ...
... with the skills I have developed pursuing this research. I would like to acknowledge several of the people who have helped and inspired me throughout my education. Among them are Dr. Allred, Dr. Davis, Dr. Hirschmann, and Dr. Nielsen all of whom exhibited an interest and excitement in physics that I ...
Miscellaeous features - JLab Tech Notes Home Page
... for the micropulse fluence for optical cavity elements. The electron beam is pulsed and the laser will only lase when the optical cavity length is very close to the synchronous length, defined as the length at which the round trip time in the cavity matches the arrival time of the electron bunches. ...
... for the micropulse fluence for optical cavity elements. The electron beam is pulsed and the laser will only lase when the optical cavity length is very close to the synchronous length, defined as the length at which the round trip time in the cavity matches the arrival time of the electron bunches. ...
Matter-Light Condensates Reach Thermal Equilibrium
... character of such condensates (for recent examples, see Ref. [1]). The new results by Sun and co-workers show that the same system can be tuned from a highly nonequilibrium state all the way to an equilibrium state by extending the lifetime of the polaritons. Reaching an equilibrium state relies on ...
... character of such condensates (for recent examples, see Ref. [1]). The new results by Sun and co-workers show that the same system can be tuned from a highly nonequilibrium state all the way to an equilibrium state by extending the lifetime of the polaritons. Reaching an equilibrium state relies on ...
Optical feedback stabilization of photonic microwave generation
... P1 dynamics exhibits a regeneration of the optical injection and oscillation sidebands equally separated from the regeneration by the oscillation frequency. Owing to the red-shifted cavity resonance enhancement [5–7], the lower oscillation sideband is typically much stronger than the upper one. Thes ...
... P1 dynamics exhibits a regeneration of the optical injection and oscillation sidebands equally separated from the regeneration by the oscillation frequency. Owing to the red-shifted cavity resonance enhancement [5–7], the lower oscillation sideband is typically much stronger than the upper one. Thes ...
Versatile two-dimensional potentials for ultra
... 3. Experimental setup and results To create a ring potential an intensity locked, red-detuned laser beam is rapidly scanned in space using a two-dimensional AOM (IntraAction, DTD-274HD6), with two independent AOMs mounted perpendicularly with respect to the diffraction directions. The deflection ang ...
... 3. Experimental setup and results To create a ring potential an intensity locked, red-detuned laser beam is rapidly scanned in space using a two-dimensional AOM (IntraAction, DTD-274HD6), with two independent AOMs mounted perpendicularly with respect to the diffraction directions. The deflection ang ...
Femtosecond-laser-produced low-density plasmas in transparent
... kinetic energy to be able to move without being captured by local potential energy barriers. Transitions between bound and quasi-free states are the equivalent of ionization of molecules in gases. To describe the breakdown process in water, Sacchi14 has proposed that it should be treated as an amorp ...
... kinetic energy to be able to move without being captured by local potential energy barriers. Transitions between bound and quasi-free states are the equivalent of ionization of molecules in gases. To describe the breakdown process in water, Sacchi14 has proposed that it should be treated as an amorp ...
Advanced Applications
... The quarter-wave plate placed after the vapor cell can be rotated so as to alter the intensities of each component as well as the zero crossing of the error signal. This in turn allows for the frequency of the tunable laser to be shifted to higher or lower values. Tuning of the laser lock is very us ...
... The quarter-wave plate placed after the vapor cell can be rotated so as to alter the intensities of each component as well as the zero crossing of the error signal. This in turn allows for the frequency of the tunable laser to be shifted to higher or lower values. Tuning of the laser lock is very us ...
Investigation of the characteristic properties of high - Prof. Shih
... To be able to discuss the main features of the HHG spectrum for each case, we first need to analyze the effect of time delay to explain the observations we just made on the return time intervals, and also provide a qualitative picture for the travelling wave packets under each of the given laser field ...
... To be able to discuss the main features of the HHG spectrum for each case, we first need to analyze the effect of time delay to explain the observations we just made on the return time intervals, and also provide a qualitative picture for the travelling wave packets under each of the given laser field ...
FABRY PEROT RESONATOR
... A laser beam A hits the beam-splitting prism as shown in Fig. 4. At this point it is split up into the two components R (reference beam) and M (measuring beam). This is an important characteristic of this type of interferometer. They are therefore called two-beam interferometers, whereas in the inte ...
... A laser beam A hits the beam-splitting prism as shown in Fig. 4. At this point it is split up into the two components R (reference beam) and M (measuring beam). This is an important characteristic of this type of interferometer. They are therefore called two-beam interferometers, whereas in the inte ...
Squeezed Light - University of New Mexico
... the amount of laser noise that enters the SHG crystal. From the graph on the right hand side of Fig. III A it is clear, that a major factor limiting the squeezing is the noise of the laser pump. In another experiment performed by Bell et al. [8], bright tunable ultraviolet squeezed light was generat ...
... the amount of laser noise that enters the SHG crystal. From the graph on the right hand side of Fig. III A it is clear, that a major factor limiting the squeezing is the noise of the laser pump. In another experiment performed by Bell et al. [8], bright tunable ultraviolet squeezed light was generat ...
Role of dispersion in pulse emission from a sliding
... d . 0, the low-intensity background is unstable and therefore the solitary wave [Eqs. (3) and (4)] will eventually decay owing to its interaction with the exponentially amplified noise and radiation. On the other hand, it can be shown that this solution with d , 0 is by itself unstable.16 Therefore ...
... d . 0, the low-intensity background is unstable and therefore the solitary wave [Eqs. (3) and (4)] will eventually decay owing to its interaction with the exponentially amplified noise and radiation. On the other hand, it can be shown that this solution with d , 0 is by itself unstable.16 Therefore ...
The Onset of Matter-Wave Amplification in a Superradiant Bose
... Fig. 2A. In lowest order, forward peaks [label (1)] are generated when a pump photon with momentum បk is scattered off a condensate atom (zero momentum), thereby producing a scattered photon with momentum ប(k ⫺ q) and a recoiling atom with momentum បq, q ⫽ 公2 k. In contrast, backward peaks [label (2 ...
... Fig. 2A. In lowest order, forward peaks [label (1)] are generated when a pump photon with momentum បk is scattered off a condensate atom (zero momentum), thereby producing a scattered photon with momentum ប(k ⫺ q) and a recoiling atom with momentum បq, q ⫽ 公2 k. In contrast, backward peaks [label (2 ...
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 ...
A Survivable Protection and Restoration Scheme using Wavelength
... groups exploiting reflective semiconductor optical amplifier (RSOA) [2-3], injection-locked Febry-Perot laser diode ( FP-LD) [4] and reflective electro-absorption modulator (R-EAM) [5]. Nonetheless, those schemes either suffer from limited bandwidth capacity and/or performance degradation because of ...
... groups exploiting reflective semiconductor optical amplifier (RSOA) [2-3], injection-locked Febry-Perot laser diode ( FP-LD) [4] and reflective electro-absorption modulator (R-EAM) [5]. Nonetheless, those schemes either suffer from limited bandwidth capacity and/or performance degradation because of ...
76, 023605 (2007).
... exciting possibilities are currently the subject of active study 关5兴. The first 共and the most direct兲 envisions simulation of conventional condensed matter spin-lattice models in optical lattices. Quantum magnetism arising from strong correlation leads to many-body spin ground states that can be cha ...
... exciting possibilities are currently the subject of active study 关5兴. The first 共and the most direct兲 envisions simulation of conventional condensed matter spin-lattice models in optical lattices. Quantum magnetism arising from strong correlation leads to many-body spin ground states that can be cha ...
Wavelength verification of laser through varied slit widths using a
... slit/s. This is called single slit diffraction. Using this ability, the wavelength of a certain light source, like laser, can be determined. This is through the working equation: = . Through the CCD (charge-coupled device), the diffraction of the light was seen and using the Vision Assis ...
... slit/s. This is called single slit diffraction. Using this ability, the wavelength of a certain light source, like laser, can be determined. This is through the working equation: = . Through the CCD (charge-coupled device), the diffraction of the light was seen and using the Vision Assis ...
Detailed Study Of AlAs-Oxidized Apertures in VCSEL Cavities for
... 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] and [14] to calculate the mode spectrum of a cold cavi ...
... 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] and [14] to calculate the mode spectrum of a cold cavi ...
Manipulating atoms with photons (Nobel lecture of C. Cohen
... 1950), which uses resonant exchanges of angular momentum between atoms and circularly polarized light for polarizing the spins of these atoms. These experiments predate the use of lasers in atomic physics. The manipulation of external degrees of freedom uses the concept of radiative forces resulting ...
... 1950), which uses resonant exchanges of angular momentum between atoms and circularly polarized light for polarizing the spins of these atoms. These experiments predate the use of lasers in atomic physics. The manipulation of external degrees of freedom uses the concept of radiative forces resulting ...
Procedure - K Street Studio
... phase. (Figure 2 illustrates the concept of phase and constructive and destructive interference of waves.) The diffraction angle 22 is the angle Figure 1 Diffraction through a series of evenly spaced between the original beam direction (n=0) and the slits. diffracted ray (n>0), 8 is the distance bet ...
... phase. (Figure 2 illustrates the concept of phase and constructive and destructive interference of waves.) The diffraction angle 22 is the angle Figure 1 Diffraction through a series of evenly spaced between the original beam direction (n=0) and the slits. diffracted ray (n>0), 8 is the distance bet ...
Quantum state-resolved probing of strong-field
... the measured ρ3/2,3/2 : ρ3/2,1/2 ratio of 0.17 ± 0.09 is significantly larger than that predicted by the calculation, which gives a value of 0.04 for this ratio. The discrepancy between experiment and theory can be attributed to the partial breakdown of the adiabatic (quasi-static) approximation emp ...
... the measured ρ3/2,3/2 : ρ3/2,1/2 ratio of 0.17 ± 0.09 is significantly larger than that predicted by the calculation, which gives a value of 0.04 for this ratio. The discrepancy between experiment and theory can be attributed to the partial breakdown of the adiabatic (quasi-static) approximation emp ...
- sfo
... output facet relative to the grating. The resolution of the complex oscillation condition (Eq. 4) gives the DFB modes (optical frequency ω), their corresponding threshold gain (threshold carrier density) and the modal selectivity (threshold gain difference between main and satellite modes). The thres ...
... output facet relative to the grating. The resolution of the complex oscillation condition (Eq. 4) gives the DFB modes (optical frequency ω), their corresponding threshold gain (threshold carrier density) and the modal selectivity (threshold gain difference between main and satellite modes). The thres ...
A Non-Contact Pulse Automatic Positioning Measurement System
... the pulse is the blood fluctuation phenomenon triggered by the aortic wall’s elastic relaxation and contraction caused by cardiac ejection. The tip of the artery experiences a similar wave-like fluctuation, also known as the pulse wave [1–4]. Cardiac ejection can cause different states of blood volu ...
... the pulse is the blood fluctuation phenomenon triggered by the aortic wall’s elastic relaxation and contraction caused by cardiac ejection. The tip of the artery experiences a similar wave-like fluctuation, also known as the pulse wave [1–4]. Cardiac ejection can cause different states of blood volu ...
Technical Note LIGO- T030087-00-R x/xx/99
... the heating estimate above, and compared to the Hello-Vinet analytical model for axisymmetric heating. The resulting radius of curvature was estimated by fitting a 8th order polynomial to the deformation of a diameter of the HR face and taking the 2nd order coefficient as the inverse of twice the ra ...
... the heating estimate above, and compared to the Hello-Vinet analytical model for axisymmetric heating. The resulting radius of curvature was estimated by fitting a 8th order polynomial to the deformation of a diameter of the HR face and taking the 2nd order coefficient as the inverse of twice the ra ...
Generation of lattices of optical vortices
... applications in the optical transmission of information and in guiding and trapping of particles. Vortices can be generated in several different controllable ways in lasers with large Fresnel numbers , by helical phase plates3, laser mode converters4, or computer-generated holograms (CGHs)5. The las ...
... applications in the optical transmission of information and in guiding and trapping of particles. Vortices can be generated in several different controllable ways in lasers with large Fresnel numbers , by helical phase plates3, laser mode converters4, or computer-generated holograms (CGHs)5. The las ...
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.