Fig. 1. Optical path structure and photo of GaSb-based semiconductor laser. (a) Optical structure; (b) photo

Fig. 2. Output parameters of GaSb-based semiconductor laser. (a) P-I-V (power-current-voltage) curve; (b) laser spectrum

Fig. 3. Output laser spots of GaSb-based semiconductor laser. (a) Near field spot; (b) far field spot

Fig. 4. Stability of GaSb-based semiconductor laser power in 24 h