Fig. 1. Experimental diagram. (a) Structure of the system. (b) Schematic principle. COS, chip on submount; FAC, fast-axis collimator; SAC, slow-axis collimator; CL, collimating lens; OC, output coupler.

Fig. 2. P-I diagram of the latest 650 nm COS single emitter.

Fig. 3. Detailed structural diagram. (a) Principle of tunable spectrum. (b) Principle of single emitters’ quantity.

Fig. 4. Experimental final power and beam combining efficiency results.

Fig. 5. Spectrum and lifetime results. (a) 5 nm, (b) 8 nm, (c) 10 nm, and (d) 1 h life test.

Fig. 6. Beam quality. (a) M² results; (b) deterioration.