Bing He, Binglin Li, Yifeng Yang, Meizhong Liu. Coherent beam combining of fiber laser array based on diffractive optical element[J]. High Power Laser and Particle Beams, 2023, 35(4): 041002
- High Power Laser and Particle Beams
- Vol. 35, Issue 4, 041002 (2023)
Fig. 1. Top-hatted beam with square and circlar beam profile
Fig. 2. Schematic diagram of injection locking structure of binary grating coherent beam combining (CBC) technology co-cavity structure
Fig. 3. Basic principle and experimental setup of coherent beam combining of three-channel single-mode fiber lasers
Fig. 4. Principle of coherent beam combining of semiconductor lasers based on Damman gratings
Fig. 5. Experimental setup and spectrogram of passive coherent beam combining based on quantum cascade lasers (QCLs) and Dammann gratings
Fig. 6. All-optical feedback ring cavity experimental setup and experimental results
Fig. 7. DOE-based active coherent beam combining system
Fig. 8. Schematic diagram of DOE coherent beam combining
Fig. 9. Two-dimensional DOE coherent beam combining system
Fig. 10. Results of two-dimensional DOE coherent beam combining
Fig. 11. 2.4 kW DOE coherent beam combining experiment structure diagram
Fig. 12. Structure diagram of 4.9 kW DOE coherent beam combining system
Fig. 13. Experimental setup of two-dimensional combination of four ultrashort pulsed beams using a diffractive optic pair
Fig. 14. Experimental setup of 8-array ultrashort pulse diffraction coherent beam combining
Fig. 15. Formation of the 5 × 5 uncombined beam array exiting DOE2, with a 3 × 3 incident beam array
Fig. 16. Experimental setup of deterministic stabilization of eight-way 2D diffractive beam combining using pattern recognition
Fig. 17. SLM combiner experiment and hologram on SLM for generating 9×9 beams
Fig. 18. Structure of the neural network, with interference patterns (17×17) as input and the corresponding 81-beam phases array (9×9) as the output
Fig. 19. Far-field interference pattern of three tiled aperture pulsed beamlets by an all-optical feedback loop
Fig. 20. Measured pulse shape of the combined beam in five cycles
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Table 1. Representative research results of DOE CW CBC
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Table 2. Representative research results of DOE pulse CBC
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