A very convenient setup to generate intense VUV coherent light at
... of dominant saturation processes, which are interesting to follow. While a two-photon absorption could limit the first line production efficiency, the detuning from the resonance would change the nature of saturation and its onset. Here modification of the refractive index of nonlinear medium by the i ...
... of dominant saturation processes, which are interesting to follow. While a two-photon absorption could limit the first line production efficiency, the detuning from the resonance would change the nature of saturation and its onset. Here modification of the refractive index of nonlinear medium by the i ...
Orbital angular momentum: origins
... Most scientists realize that light carries a linear momentum equivalent to h̄k0 per photon and, if circularly polarized, a spin angular momentum (SAM) of ±h̄ per photon. In 1992, Allen et al. recognized that light beams with an azimuthal phase dependence of exp(i�φ) carry an orbital angular momentum ...
... Most scientists realize that light carries a linear momentum equivalent to h̄k0 per photon and, if circularly polarized, a spin angular momentum (SAM) of ±h̄ per photon. In 1992, Allen et al. recognized that light beams with an azimuthal phase dependence of exp(i�φ) carry an orbital angular momentum ...
The List of Author`s Publications
... 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 differential expansion [12]. The net result is beam distortion due to thermal lensing, depolarization loss ...
... 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 differential expansion [12]. The net result is beam distortion due to thermal lensing, depolarization loss ...
Faraday isolation
... Thermal effects (thermal dependence of Verdet constant, photoelastic birefringece, thermal lensing, …): the Faraday has been tuned in air with low power (0.5 W) whereas now about 7W (in vacuum) are going through it test in tower have been performed with less than 50 mW: the Faraday should be tun ...
... Thermal effects (thermal dependence of Verdet constant, photoelastic birefringece, thermal lensing, …): the Faraday has been tuned in air with low power (0.5 W) whereas now about 7W (in vacuum) are going through it test in tower have been performed with less than 50 mW: the Faraday should be tun ...
Direct welding of fused silica with femtosecond fiber laser
... of the welding lines is 10 mm long. From the camera picture as shown in Fig. 6, there is clearly a rectangular section (black rectangular region) that does not show any interference fringe all the way along the sample from left to right. This shows very good complete one edge sealing along the whole ...
... of the welding lines is 10 mm long. From the camera picture as shown in Fig. 6, there is clearly a rectangular section (black rectangular region) that does not show any interference fringe all the way along the sample from left to right. This shows very good complete one edge sealing along the whole ...
Study of the temporal and spatial dynamics of
... very short time range (fraction of a nanosecond), thus decreasing the number of electrons that can migrate outside the plasma region initially formed near the focal plane. On the other side, transport of ionizing radiation has been calculated to occur at an average speed of 3 X 104 M/s (Ref. 20) in ...
... very short time range (fraction of a nanosecond), thus decreasing the number of electrons that can migrate outside the plasma region initially formed near the focal plane. On the other side, transport of ionizing radiation has been calculated to occur at an average speed of 3 X 104 M/s (Ref. 20) in ...
Light–matter interaction induces a single positive vortex with swirling
... parallel planar interfaces, a glass plate and a slab of the transparent photoconductor Bi12 SiO20 (BSO), 25 × 25 mm2 , thickness 1 mm. The interior surfaces are treated to obtain the homeotropic anchoring of the LC, that is, with the nematic director orthogonal to the confining walls (cf. figure 1b) ...
... parallel planar interfaces, a glass plate and a slab of the transparent photoconductor Bi12 SiO20 (BSO), 25 × 25 mm2 , thickness 1 mm. The interior surfaces are treated to obtain the homeotropic anchoring of the LC, that is, with the nematic director orthogonal to the confining walls (cf. figure 1b) ...
Untitled - X-Ray and Neutron Science
... With the advert of modern computers and technologies, simulation has become a very powerful tool, which allows prediction of experimental outcomes with high precision and accuracy, optimisation and improvement of existing setups and can even reveal otherwise unattainable qualities of a modelled inst ...
... With the advert of modern computers and technologies, simulation has become a very powerful tool, which allows prediction of experimental outcomes with high precision and accuracy, optimisation and improvement of existing setups and can even reveal otherwise unattainable qualities of a modelled inst ...
labs for the photon/photon2 experiment kit
... We can learn a lot about a light source by studying its spectrum. For example, the spectrum of the sun is composed of a complete “rainbow” crossed by dark lines due to absorption of certain wavelengths by the sun’s atmosphere. An excited gas at low pressure produces an emission spectrum, bright line ...
... We can learn a lot about a light source by studying its spectrum. For example, the spectrum of the sun is composed of a complete “rainbow” crossed by dark lines due to absorption of certain wavelengths by the sun’s atmosphere. An excited gas at low pressure produces an emission spectrum, bright line ...
Precision interferometer
... a lens is placed between the laser source and the Figure 2. Fringes beam-splitter, the light ray spreads out, and an interference pattern of dark and bright rings, or fringes, is seen on the viewing screen (Figure 2). Since the two interfering beams of light were split from the same initial beam, th ...
... a lens is placed between the laser source and the Figure 2. Fringes beam-splitter, the light ray spreads out, and an interference pattern of dark and bright rings, or fringes, is seen on the viewing screen (Figure 2). Since the two interfering beams of light were split from the same initial beam, th ...
Measuring the complex orbital angular momentum spectrum of light
... overlapping integral with Eq. (3). It can be seen that the phase of the complex OAM spectrum coefficient is defined as the relative phase shift compared with the recorded E l . In principle, the ambient variations between the two steps, e.g., path delay and beam alignment, would deteriorate the meas ...
... overlapping integral with Eq. (3). It can be seen that the phase of the complex OAM spectrum coefficient is defined as the relative phase shift compared with the recorded E l . In principle, the ambient variations between the two steps, e.g., path delay and beam alignment, would deteriorate the meas ...
Laser beam profiler
A laser beam profiler captures, displays, and records the spatial intensity profile of a laser beam at a particular plane transverse to the beam propagation path. Since there are many types of lasers — ultraviolet, visible, infrared, continuous wave, pulsed, high-power, low-power — there is an assortment of instrumentation for measuring laser beam profiles. No single laser beam profiler can handle every power level, pulse duration, repetition rate, wavelength, and beam size.