Table 4 Fraction of MPET and expected Raman signal reached by some types of lasers
From: Optimization of laser wavelength, power and pulse duration for eye-safe Raman spectroscopy
Laser characteristics | Fraction of MPET (%) | Expected Raman signal (a.u.) | Laser type | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
wl | power | PRR | E0 | t | T (s) | T (s) | Â | ||||||
nm | W | Hz | mJ | ns | 0.01 | 0.1 | 1 | 10 | 0.01 | 0.1 | 1 | 10 | |
355 | 0.2 | 50 | 4 | 11 | 1 | 6 | 19 | 61 | 0.28 | 2.69 | 15.1 | 85.0 | Lamp pumped, tripled Nd:YAG |
355 | 0.7 | 100 | 7 | 12 | 3 | 10 | 33 | 100 | 0.82 | 4.62 | 26.0 | 140 | Diode pumped, tripled Nd:YAG |
355 | 4 | 4 104 | 0.1 | 2 | 23 | 100 | 100 | 100 | 5.61 | 44.2 | 78.5 | 140 | Diode pumped, tripled Nd:YAG |
355 | 8 | 5 104 | 0.16 | 25 | 45 | 100 | 100 | 100 | 11.2 | 44.2 | 78.5 | 140 | Diode pumped, tripled Nd:YAG |
351 | 15 | 750 | 20 | 18 | 17 | 52 | 100 | 100 | 4.26 | 24.0 | 81.2 | 144 | Excimer, XeFl |
266 | 0.08 | 20 | 4 | 11 | 100 | 100 | 100 | 100 | 1.00 | 1.00 | 1.00 | 1.00 | Lamp pumped, quadrupled Nd:YAG |
405 | 0.5 | CW | 500 | 109 | 100 | 100 | 100 | 100 | 0.01 | 0.03 | 0.17 | 0.96 | CW diode laser |
325 | 0.1 | CW | 100 | 109 | 1 | 3 | 18 | 100 | 0.18 | 1.83 | 18.3 | 182 | He-Cd CW laser |
1570 | 1.5 | 30 | 50 | 6 | 2 | 15 | 100 | 100 | 0.02 | 0.24 | 1.62 | 1.62 | OPO-shifted Er:glass |