The first data set is based on the first principle simulation of photon-counting laser altimetry. As mentioned in our previous letter [15], the transmitter and receiver are modeled using a model of the ICESat-2 ATLAS instrument. The laser beam is characterized as circular Gaussian with a diam...
Probability samplingGaussian beamMonte Carlo methodlaser range profileResearch on target recognition in random media by Monte Carlo method has made rapid progress. However, the commonly used probability sampling function of the emitted photons' directions is not suitable for simulating the radial cross-...
A generalized method for determining the properties of a Gaussian laser beam focus including waist radius, position, and intensity distribution is presented. Of significance to in situ laser diagnostic methods is a unique analysis of illuminated area as a function of intensity in a plane of the la...
The transverse profile of the optical intensity of the beam with an optical power P can be described with a Gaussian function:The name “Gaussian beams” results from the use of the Gaussian amplitude and intensity profile functions; it is not a concept in Gaussian optics. Here, the beam rad...
When a glass material is excited by an intense NIR fs laser beam with Gaussian distribution, the material excited by the multiphoton absorption acts as a lens to focus the pulse itself59,60. On the present machining condition, e.g. 2.8 µJ/pulse, that the fs laser is focused at the ...
Fig. 4: Optimal regime of electron acceleration at normal incidence and comparison with a plane-polarized Gaussian beam. a–e Electron data from a simulation where a target with \({n}_{\max }=0.5{n}_{{{\rm{c}}}\) is irradiated by the helical beam. f–h Electron data from a simul...
Gaussian laser beams have more energy outside its 1/e2 beam diameter than you might think. Since the intensity distribution is like a bell curve, there is a non-negligible percent of your laser outside the beam width (13.5%, actually). So use this calculator to see how big your aperture...
The mechanism of light-shift-related uncertainty in an atom-interferometry gravimeter is investigated systematically, which arises from the inhomogeneous intensity of Raman beams and the Gaussian distribution of an atomic cloud. Experiments using atom interferometry are performed to verify this systematic er...
The method is also called the D4σ method because for the beam diameter, one obtains 4 times the standard deviation of the intensity distribution. One can define the beam radius wy in an analogous fashion, just replacing x2 with y2 in the upper integral. For Gaussian beams, the D4σ ...
The laser beam was associated with a Gaussian energy distribution (TEM00 mode). Laser beam diameter was 1 mm on the sample surface, whereas, a laser beam overlap of 0.6 mm was implemented to ensure complete consolidation of the deposited samples. Laser beam rastering velocity was ...