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year 27, Issue 2 (ICOP & ICPET 2021 2021)
ICOP & ICPET _ INPC _ ICOFS 2021, 27(2): 523-526 |
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Siahvashi N, Hamdami M, Arabanian A S, Massudi R. Investigating the effect of key parameters of array aperture with square arrangement on the intensity distribution and power in the bucket, in coherent laser beam combination. ICOP & ICPET _ INPC _ ICOFS 2021; 27 (2) :523-526
URL: http://opsi.ir/article-1-2418-en.html
URL: http://opsi.ir/article-1-2418-en.html
1- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
Abstract: (821 Views)
Investigating effective parameters in the array aperture provides the possibility of achieving a combined beam with high quality and power. The beam waist, the distance between beams in the array aperture, and the vacancy factor are the most important parameters in the geometric arrangement of beams. In this study, a combination of 36 fiber laser beams in a side-by-side arrangement with square geometry is investigated. Considering the location of the observation plane at 2.5 km distance and assuming a constant value for vacancy factor in array aperture, the effect of beams waist sizes in array aperture on far-field intensity distribution and power in the bucket has been investigated. By four times increasing the beam waist, the amount of power in the bucket/intensity distribution width increases/decreases more than two orders of magnitude. Besides, by simulating the intensity distribution and power in the bucket, the effect of beam waist with different vacancy factor values, i.e. 1, 2, 3, and 4, it was found the peak intensity increases an order of magnitude and the intensity distribution width is reduced 2 times for vacancy factor of 1 compared to vacancy factor of 4.
Keywords: square arrangement, beam combining, power in bucket. Intensity distribution, vacancy factor, beam waist, beam divergence
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