Fig. 1. Divergence angle and beam size of single emitter laser after collimation. (a) Fast axis divergence angle; (b) fast axis beam size; (c) slow axis divergence angle; (d) slow axis beam size.

Fig. 2. Schematic of the beam combination structure.

Fig. 3. Laser beam distribution (a) after beam shaping and space combining and (b) after fiber coupling.

Fig. 4. Diagram of the light path structure.

Fig. 5. (a) Laser beam distribution after homogenization; (b) horizontal beam size; (c) vertical beam size.

Fig. 6. Divergence angle after beam shaping: (a) horizontal direction; (b) vertical direction.

Fig. 7. P-I-V curves of laser illuminator.

Fig. 8. Physical image of laser beam (a) horizontal direction (b) vertical direction.

Fig. 9. Homogeneity of laser beam with varying operating current.

Fig. 10. Illuminating effect of diode laser with varying operating currents: (a) current 0 A; (b) current 2 A; (c) current 4 A; (d) current 6 A; (e) current 7 A; (f) current 8 A.