Multiplexing in high-density optical data storage using the orbital
... value of l h . For the total beam, the angular momentum per unit area and per second is given by the quantity l I / 2πν with I being the intensity of the beam and ν the frequency of the light. The wavefront with an l = 1 topological charge is thus a helical function and is usually known as an optica ...
... value of l h . For the total beam, the angular momentum per unit area and per second is given by the quantity l I / 2πν with I being the intensity of the beam and ν the frequency of the light. The wavefront with an l = 1 topological charge is thus a helical function and is usually known as an optica ...
High resolution, high contrast, high focal depth nonlinear beams
... This article aims to demonstrate the particular advantages of using non-standard conical waves in the place of conventional laser beams, for the purpose of achieving extreme performance in several areas of laser optics among the most important, ranging from material processing to microscopy and to t ...
... This article aims to demonstrate the particular advantages of using non-standard conical waves in the place of conventional laser beams, for the purpose of achieving extreme performance in several areas of laser optics among the most important, ranging from material processing to microscopy and to t ...
Single-frequency blue light generation by single-pass
... and the resulting generated beam is nearly diffraction limited with M2 < 1.15 in both directions. The beam caustic through the focus region is shown in Fig. 5 where the beam profiles in the vertical and horizontal directions are included. The power stability of the current setup is limited by the no ...
... and the resulting generated beam is nearly diffraction limited with M2 < 1.15 in both directions. The beam caustic through the focus region is shown in Fig. 5 where the beam profiles in the vertical and horizontal directions are included. The power stability of the current setup is limited by the no ...
1.5% root-mean-square flat-intensity laser beam
... both intensity and phase. However, since the calculation of lens surfaces is based on specific input and output beam shapes, the whole system can only work well for the single input–output combination. In addition, the technique can do nothing to reduce the effect of spatial noise and imperfections ...
... both intensity and phase. However, since the calculation of lens surfaces is based on specific input and output beam shapes, the whole system can only work well for the single input–output combination. In addition, the technique can do nothing to reduce the effect of spatial noise and imperfections ...
On the path to Bose-Einstein condensate
... in a wide distribution and to stay in resonance with them as they are cooled. This concept was put into practice in 1985 by W. Ertmer, R. Blatt, J. Hall and M. Zhu. In this cooling method the frequency of the light must be swept over a range of more that 1 GHz in a few milliseconds. This is usually ...
... in a wide distribution and to stay in resonance with them as they are cooled. This concept was put into practice in 1985 by W. Ertmer, R. Blatt, J. Hall and M. Zhu. In this cooling method the frequency of the light must be swept over a range of more that 1 GHz in a few milliseconds. This is usually ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... mechanical touch. By using the various effects of light, dielectric particles ranging in size from submicron to hundreds of microns can be successfully held by a beam (or beams) of light. Optical tweezers is a type of optical micro-manipulation and micro-fabrication system. Optical tweezers are scie ...
... mechanical touch. By using the various effects of light, dielectric particles ranging in size from submicron to hundreds of microns can be successfully held by a beam (or beams) of light. Optical tweezers is a type of optical micro-manipulation and micro-fabrication system. Optical tweezers are scie ...
Nonparaxial Mathieu and Weber Accelerating Beams Peng Zhang, Yi Hu, Tongcang Li,
... From Eq. (9), one can readily deduce the mask information needed for generating the WAB using the Fourier transformation method. Figure 2 shows a typical example of our WABs at ¼ 532 nm, ¼ 40, and ¼ 104 and its comparison with an Airy beam with a similar beam size, where (a)–(d) depict the bea ...
... From Eq. (9), one can readily deduce the mask information needed for generating the WAB using the Fourier transformation method. Figure 2 shows a typical example of our WABs at ¼ 532 nm, ¼ 40, and ¼ 104 and its comparison with an Airy beam with a similar beam size, where (a)–(d) depict the bea ...
Use of beam parameters in optical component testing
... * Some authors define M2 equivalently in terms of beam diameter, wavelength, and far-field divergence angle. M2 has also been defined in terms of radii other than the second moment; the definition used here is the most common. ...
... * Some authors define M2 equivalently in terms of beam diameter, wavelength, and far-field divergence angle. M2 has also been defined in terms of radii other than the second moment; the definition used here is the most common. ...
Physical Optics - Haverford College
... (with m as an integer), but one can also determine the relative intensities I() of the diffracted spots. If we insert a lens behind the diffraction grating, the effect of the lens serves to refocus the interference pattern so it reforms into an image of the diffraction grating. We will see shortly ...
... (with m as an integer), but one can also determine the relative intensities I() of the diffracted spots. If we insert a lens behind the diffraction grating, the effect of the lens serves to refocus the interference pattern so it reforms into an image of the diffraction grating. We will see shortly ...
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.