RT - Journal Article
T1 - The effect of beams distribution in the near field on the intensity distribution and power in the bucket in the far field in laser beams combination
JF - opsi
YR - 2020
JO - opsi
VO - 26
IS - 0
UR - http://opsi.ir/article-1-2167-en.html
SP - 725
EP - 728
K1 - Geometrical array
K1 - coherent and incoherent beam combining
K1 - power in bucket. Intensity distribution
K1 - array aperture
AB - Achieving a high power and high quality beam is the most important purpose of laser beam combination. The geometrical arrangement and the beam distribution in array aperture have effective role in beam combination quality. By applying the beams in the side-by-side arrangements of a single line, two parallel lines, three parallel lines, and six parallel lines in array aperture, and with 2.5 km distance of observing plane, the effect of the beam distribution at array aperture in coherent and incoherent combination has been examined. For this purpose, the distribution of near and far field intensities for two modes is presented. Also by presenting the power in the bucket diagram, the amount of power localized at the center of the far-field observing plane for all arrangements is investigated. The results show that for a constant beam waist and constant distance between beams in array aperture, the amount of power in the bucket increases more than two order of magnitude, and the intensity distribution width of central peak decreases more than one order by changing the beam distribution to the square arrangement. Finally, the results show that the profile of the combined beam has the same symmetry as the beams are arranged in the array aperture.
LA eng
UL http://opsi.ir/article-1-2167-en.html
M3
ER -