Table 1 Performances of different fiber laser sources for photoacoustic excitation
Laser type | Output wavelength | Pulse energy | Repetition rate | Pulse width | Spectral width |
|---|---|---|---|---|---|
Q-switched fiber laser [21] | 1700, 1725 and 1750 nm, switchable | 75.3 μJ at maximum (at 1750 nm) | 10 kHz | 16.7 ns | 0.1 nm |
Supercontinuum fiber laser [29] | 1440–1850 nm, switchable | 18.3 μJ | 100 kHz | 7 ns | 33–38 nm |
Raman-based fiber laser [38] | 532, 545, 558, 570 and 620/640 nm, temporally separated | >  90 nJ | 1 MHz | <  7 ns | 3 nm |