Fig. 1. Schematic diagram of spectral beam combining structure

Fig. 2. Laser characteristics before spectrum combining. (a) Free lasing spectrum before wavelength locking; (b) Optical field distribution before wavelength locking

Fig. 3. Laser characteristics after spectral combination. (a) Laser spectrum after spectral combination; (b) Light field distribution after spectrum combining

Fig. 4. Power curve and E-O conversion efficiency curve of free running and spectral combining

Fig. 5. Linear fitting of beam diameter