Table 1.
Description of the ultra-short pulsed laser parameters. All having pulses of only 12 trillionths of a second (10–12 s) pulse duration
| Description | Laser Random Hatching Pattern (LR) | Laser Crossed-Lines Pattern (LC) | Laser Wave Pattern (LW) |
|---|---|---|---|
| Crystal | Nd: YVO4 | Nd: YVO4 | Nd: YVO4 |
| Wavelength | 1064 nm | 1064 nm | 1064 nm |
| Output Power | 5 W | 9 W | 5 W |
| Energy per Pulse | 50 µJ | 11 µJ | 50 µJ |
| Average Fluence | 9.5 J/cm2 | 2.3 J/cm2 | 9.5 J/cm2 |
| Pulse Rate | 100 kHz | 800 kHz | 100 kHz |
| Pulse Duration | 12 ps | 12 ps* | 12 ps |
| Distance of Irradiation | 100 mm | 100 mm | 100 mm |
| Scan speed | 1 m/s | 3 m/s | 1 m/s |
| Number of Scan Repetitions | 10 | 12 | 20 |
| Irradiation Pattern | Random Hatching | Crossed-lines Pattern | Wave Pattern |
| Beam diameter | 25 µm | 25 µm | 25 µm |
| Distance Between Lines (‘dy’: for LC and LR, ‘dw’: for LW) | 10 µm | 35 μm | 4 µm |
| Average Ablation Depth | ≈30 μm | ≈15 μm | ≈32 μm |
*ps picoseconds