Table 4. Characteristics of optical pulses used for excitation of OA signals at 870 nm and 905 nm, respectively.

Parameter	870-nm HPDLs	905-nm HPDLs
Pulse width	95 ns	95 ns
Repetition frequency	1 kHz	1 kHz
Duty cycle	0.0095%	0.0095%
Total pulse energy	12.45 µJ	12.17 µJ
Total average power	12.45 mW	12.17 mW
Light spot area	3 mm2	3 mm2
Total pulse energy density	4.15 μJ/mm2	4.06 μJ/mm2
Total peak power delivered to sample	131 W	128 W