Yi Wang, Guangzhi Lei, Lidong Yu, Rongwei Zha, Jingfeng Zhou, Yang Bai. High power laser incoherent spatial beam combining with rectangular spot[J]. Infrared and Laser Engineering, 2022, 51(4): 20210268
- Infrared and Laser Engineering
- Vol. 51, Issue 4, 20210268 (2022)
Fig. 1. Schematic of laser incoherent space beam combining with a rectangular spot. (a) Changes in the space position of 18 laser beams; (b) Changes in the space position of two adjacent laser spots
Fig. 2. Variation between the beam propagation distance and the overlapping rate of the combined laser spot. (a) r =0, θc =10.0 mrad, different values of d ; (b) θc =10.0 mrad, d =12 mm, different values of r ; (c) r =3.5 mm, θc =14.8 mrad, d =12 mm
Fig. 3. Structural model of the beam combiner structure. (a) Collimation unit-XZ plane; (b) Combining unit-XZ plane; (c) Combining unit-YZ plane
Fig. 4. Spot energy simulation distribution of combined laser beam. (a) Δl =−150 mm; (b) Δl =−105 mm; (c) Δl =−100 mm; (d) Δl =−50 mm; (e) Δl =0 mm; (f) Δl =+50 mm; (g) Δl =+100 mm; (h) Δl =+105 mm; (i) Δl =+150 mm
Fig. 5. Photos of 18×1 laser incoherent space beam combiner. (a) Engineering three-dimensional design drawing; (b) Engineering design drawing Y-Z axis section; (c) Photo of the fiber connection end face of the combiner; (d) Overall photo of the combiner
Fig. 6. Hole morphology of the combined laser perforated steel plate sample along the combined beam direction. (a) Δl =−150 mm; (b) Δl =−105 mm; (c) Δl =−100 mm; (d) Δl =−50 mm; (e) Δl =0 mm; (f) Δl =+50 mm; (g) Δl =+100 mm; (h) Δl =+105 mm; (i) Δl =+150 mm
Fig. 7. Variation between the beam combining power and the pump current
Fig. 8. Laser spectrum before and after beam combination. (a) 18 laser beam independent spectrum superposition; Combined beam laser spectroscopy with (b) Δl =−100 mm; (c) Δl =−50 mm; (d) Δl =0 mm; (e) Δl =+50 mm; (f) Δl =+100 mm
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Table 1. Parameters of the lenses (Unit: mm)
|
Table 2. Spot size of the combined beam laser (Unit: mm)
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20