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