Laser Beam Mode Selection by Computer Generated Holograms

Abstract

Please write the hospital number of the presented case and note if Death or. Morbidity. Jan. 17 Spies 21 Karsas. 28 Maseko 's post. Kalafong hospital is situated 12km west of the city central of Pretoria and 65km the hospital has a number of facilities available as well as a full team of allied. E: mpbell@.za. Comments. Post Comment. Items marked with a * are required. At least one of the items marked with must be entered. Welcome to the Kangaroo Mother Care Unit (ward 4

Simulation of linear gradient lenses for subwavelength focusing of Gaussian beams

“…However, obtaining an optical fiber separate vortex modes and their superpositions is a big problem [14,[22][23][24][25][26]. In contrast to the classic LP-mode (mode optical fibers), angular harmonics are invariant to the scale at the input and output of fiber with the help of diffraction microstructures.…”

Wavefront aberration analysis with a multi-order diffractive optical element

“…Usually, it consists of an array of pinholes or microlenses; each of them plots a tilt of analyzed wavefront into sensor matrix [2]. Phase retrieval can be also implemented with diffractive optical elements (DOEs) which can expand analyzed light field into an orthogonal basis [3][4][5].…”

Laser beam characterization by means of diffractive optical correlation filters

“…The analysis of amplitude-phase characteristics of the laser beam is a topic in experimental physics and in a great number of laser applications, such as laser material treatment [1,2,3]. In this paper the problem is tackled using a special diffractive optical element (DOE) -MODAN -matched to a group of transversal laser modes.…”

“…Laser radiation modes are beams whose crosssection complex amplitude distributions are described by eigenfunctions of the operator of light propagation [3]. Most familiar are the Bessel or free space modes [4], and the Gaussian (Gauss-Hermite and GaussLaguerre) modes [3,5]. A fundamental property of the Gaussian modes is their ability to retain structure and mutual orthogonality while propagating in free space or lens-like medium [3,5].…”

“…In this paper the problem is tackled using a special diffractive optical element (DOE) -MODAN -matched to a group of transversal laser modes. Laser radiation modes are beams whose crosssection complex amplitude distributions are described by eigenfunctions of the operator of light propagation [3]. Most familiar are the Bessel or free space modes [4], and the Gaussian (Gauss-Hermite and GaussLaguerre) modes [3,5].…”