Far-infrared Rydberg-Rydberg transitions in a magnetic field: Deexcitation of antihydrogen atoms
... ground state 共Þ c兲 关19兴. During laser deexcitation electrons can be lost via the competitive ionization channel 共Þ d兲. Alternatively in path 2 the atoms are first deexcited to a Rydberg state below the n-mixing regime by collisional deexcitation 共e−+Atom n = 45Þ e−+Atom n = 35兲 共Þ e兲. Once the atom ...
... ground state 共Þ c兲 关19兴. During laser deexcitation electrons can be lost via the competitive ionization channel 共Þ d兲. Alternatively in path 2 the atoms are first deexcited to a Rydberg state below the n-mixing regime by collisional deexcitation 共e−+Atom n = 45Þ e−+Atom n = 35兲 共Þ e兲. Once the atom ...
High-power passively mode-locked semiconductor lasers
... lasers with surface-emitting geometries allow for much larger mode areas, particularly when optical pumping is used, so that spatially homogeneous excitation is easily achieved [5]–[7]. An external cavity with properly designed fundamental mode size supports single-transverse-mode operation. In cont ...
... lasers with surface-emitting geometries allow for much larger mode areas, particularly when optical pumping is used, so that spatially homogeneous excitation is easily achieved [5]–[7]. An external cavity with properly designed fundamental mode size supports single-transverse-mode operation. In cont ...
A Novel Pulse Measurement System by Using Laser Triangulation and a CMOS Image Sensor
... information concerning about the tested subjects’ health. 2. Principles of Measurement The proposed APM system combines the Fast Fourier Transform (FFT), the centroid method, and the optical triangulation method. The frequency spectrum of the arterial pulse waveforms measured at the specified point ...
... information concerning about the tested subjects’ health. 2. Principles of Measurement The proposed APM system combines the Fast Fourier Transform (FFT), the centroid method, and the optical triangulation method. The frequency spectrum of the arterial pulse waveforms measured at the specified point ...
Cavity-enhanced generation of 6 W cw second
... length of the crystal [8], which combined with high input power can result in high power density. As a consequence, severe thermal effects can occur due to absorption in the crystal, such as thermal lensing, dephasing or even permanent damages [9]. However, conversion efficiency can be significantly ...
... length of the crystal [8], which combined with high input power can result in high power density. As a consequence, severe thermal effects can occur due to absorption in the crystal, such as thermal lensing, dephasing or even permanent damages [9]. However, conversion efficiency can be significantly ...
Laser multipass system with interior cell configuration
... readily trace the laser beam’s path. However, once a sample cell is inserted in the central region, the alignment is ruined. The disturbing influence of the glass vessel, with two windows of width d, is illustrated by the comparison of Figs. 1(a) and 1(b). Figure 1(a) shows the laser beam traveling ...
... readily trace the laser beam’s path. However, once a sample cell is inserted in the central region, the alignment is ruined. The disturbing influence of the glass vessel, with two windows of width d, is illustrated by the comparison of Figs. 1(a) and 1(b). Figure 1(a) shows the laser beam traveling ...
NPM-O22 Influences of different low level laser power at
... The choice of a laser system for therapeutic use is based on laser tissue interaction and knowledge of chromophore and molecule that follow laser irradiation of biological materials are important (Kulkarni et al., 1988 and Sheng-Hao et al., 2009). The penetration depth of laser radiation within biol ...
... The choice of a laser system for therapeutic use is based on laser tissue interaction and knowledge of chromophore and molecule that follow laser irradiation of biological materials are important (Kulkarni et al., 1988 and Sheng-Hao et al., 2009). The penetration depth of laser radiation within biol ...
Dynamic holography in a broad-area optically pumped vertical GaAs microcavity
... actuators, whereas passive adaptive systems have the advantage that no active monitoring or control is necessary. Adaptive holographic films have several advantages as passive adaptive systems; for instance, diffraction from thin films generates multiple diffraction orders in the Raman–Nath regime, ...
... actuators, whereas passive adaptive systems have the advantage that no active monitoring or control is necessary. Adaptive holographic films have several advantages as passive adaptive systems; for instance, diffraction from thin films generates multiple diffraction orders in the Raman–Nath regime, ...
Dark Resonances From Optical Pumping to Cold Atoms and
... Note finally that the dark resonance exists only if the two laser fields are coherent. If their phases changes in a random way, the phase difference between the two absorption amplitudes appearing in Eq. (5) changes also in a random way so that the destructive interference cannot hold for all times. ...
... Note finally that the dark resonance exists only if the two laser fields are coherent. If their phases changes in a random way, the phase difference between the two absorption amplitudes appearing in Eq. (5) changes also in a random way so that the destructive interference cannot hold for all times. ...
Single-shot Detection of Wavepacket Evolution
... nearly perpendicularly to the slit in the upper field plate. The delayed pulse excites a second wavepacket that interferes with the original wavepacket. Approximately 1 µsec after the laser excitation, a voltage pulse applied to the lower field plate ionizes the Ry dberg atoms and pushes the resultin ...
... nearly perpendicularly to the slit in the upper field plate. The delayed pulse excites a second wavepacket that interferes with the original wavepacket. Approximately 1 µsec after the laser excitation, a voltage pulse applied to the lower field plate ionizes the Ry dberg atoms and pushes the resultin ...
Weak probe readout of coherent impurity orbital superpositions in
... Abstract. Pump-probe spectroscopy is the most common time-resolved technique for investigation of electronic dynamics, and the results provide the incoherent population decay time T1. Here we use a modified pump-probe experiment to investigate coherent dynamics, and we demonstrate this with a measur ...
... Abstract. Pump-probe spectroscopy is the most common time-resolved technique for investigation of electronic dynamics, and the results provide the incoherent population decay time T1. Here we use a modified pump-probe experiment to investigate coherent dynamics, and we demonstrate this with a measur ...
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 ...
Gigahertz frequency comb offset stabilization
... comb offset stabilization is one of the preferred schemes, as it allows for phase locking without a highly-stable external optical reference. For the most common self-referencing technique based on f-to-2f interferometry, optical comb spectra spanning at least one octave are required [2]. Such ultra ...
... comb offset stabilization is one of the preferred schemes, as it allows for phase locking without a highly-stable external optical reference. For the most common self-referencing technique based on f-to-2f interferometry, optical comb spectra spanning at least one octave are required [2]. Such ultra ...
Fast-light for astrophysics - Laboratory for Atomic and Photonic
... length sensitivity could be useful in optical gyroscopes that detect the rotation rate of a cavity as a change in its resonant frequency, due to a change in the effective optical path length. Gyroscopes with enhanced precision would make inertial navigation systems more accurate over long distances, ...
... length sensitivity could be useful in optical gyroscopes that detect the rotation rate of a cavity as a change in its resonant frequency, due to a change in the effective optical path length. Gyroscopes with enhanced precision would make inertial navigation systems more accurate over long distances, ...
Mode-locking
Mode-locking is a technique in optics by which a laser can be made to produce pulses of light of extremely short duration, on the order of picoseconds (10−12 s) or femtoseconds (10−15 s).The basis of the technique is to induce a fixed-phase relationship between the longitudinal modes of the laser's resonant cavity. The laser is then said to be 'phase-locked' or 'mode-locked'. Interference between these modes causes the laser light to be produced as a train of pulses. Depending on the properties of the laser, these pulses may be of extremely brief duration, as short as a few femtoseconds.