Photonics Research, Volume. 10, Issue 2, 444(2022)
Principle and numerical demonstration of high power all-fiber coherent beam combination based on self-imaging effect in a square core fiber
Fig. 1. (a) Schematic diagram of a square core fiber waveguide. (b) Diagram of the transmission results and the beam spots.
Fig. 2. Diagram of the beam quality and beam profile at different integer multiple of the imaging length.
Fig. 3. (a) Schematic diagram of the beam combining device. (b) Schematic diagram of the all-fiber CBC system with a square fiber combiner.
Fig. 4. (a) Beam quality as a function of NA. (b) Beam efficiency as a function of NA.
Fig. 5. (a) Beam quality as a function of fiber core size and square fiber core size. (b) Beam efficiency as a function of fiber core size and square fiber core size.
Fig. 6. (a) Optimal beam quality as a function of fiber core size. (b) Beam efficiency as a function of fiber core size with
Fig. 7. (a) Beam quality as a function of NA with different fiber arrays. (b) Beam efficiency as a function of NA with different fiber arrays. (c) Diagram of typical intensity distribution of a
Fig. 8. (a) Input intensity distribution with the
Fig. 9. (a) Diagram of output intensity distribution from the
Fig. 10. (a) Beam quality as a function of wavelength. (b) Beam efficiency as a function of wavelength.
Fig. 11. Diagram of the comparison and data fitting of the combining efficiency of different fiber arrays.
Fig. 14. (a) Diagram of the beam spot from MFA. (b)
Fig. 15. Diagram of the side view of the splice point between the output fiber and the square core fiber.
Fig. 16. (a) Diagram of the beam spot at the 5.5 cm length of the square fiber. (b) Diagram of the beam spot at the 11 cm length of the square fiber. (c)
Fig. 17. Theoretical and experimental comparison of the self-imaging effect in the square fiber.
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Yuefang Yan, Yu Liu, Haoyu Zhang, Yue Li, Yuwei Li, Xi Feng, Donglin Yan, Jianjun Wang, Honghuan Lin, Feng Jing, Wenhui Huang, Rumao Tao, "Principle and numerical demonstration of high power all-fiber coherent beam combination based on self-imaging effect in a square core fiber," Photonics Res. 10, 444 (2022)
Category: Lasers and Laser Optics
Received: Aug. 26, 2021
Accepted: Dec. 13, 2021
Published Online: Jan. 21, 2022
The Author Email: Rumao Tao (supertaozhi@163.com)