Fig. 1. Schematics of experimental setup and focal position. (a) Experimental setup; (b) focal position

Fig. 2. Specimen size for shear strength test

Fig. 3. Cross-section morphologies of welded sample at different welding speeds when Z is 0 mm. (a) v=25 mm/s; (b) v=35 mm/s

Fig. 4. Glass welding diagrams. (a) Welding with short focal length focusing lens; (b) welding with long focal length focusing lens

Fig. 5. Cross section morphology of welded specimens at different laser energy when Z=-1 mm. (a) Q=5 μJ; (b) Q=6.25 μJ; (c) Q=7.5 μJ; (d) Q=8.75 μJ

Fig. 6. Welding process window at different laser pulsed energies when Z=-1 mm

Fig. 7. Cross-section morphology of welded specimens at different scanning speeds and diagram of melting area of cross-section (Z=-1 mm, Q=6.25 μJ). (a) v=25 mm/s; (b) v=30 mm/s; (c) v=35 mm/s; (d) v=40mm/s; (e) diagram of melting area of cross-section

Fig. 8. Seal test results of sample placed in red ink for different time (Z=-1 mm, Q=6 μJ, v=50 mm/s, scanning space is 50 μm). (a) 1 d; (b) 20 d

Fig. 9. Transmission of original glass and weld at different wavelengths (Z=-1 mm, Q=6 μJ, v=25 mm/s)