“…The suitability of a pulsed laser for nonlinear imaging can be quantified by a figure-of-merit (FOM) that is defined by the product of squared peak power times the duty cycle, thus being a measure for the generated TPEF signal [2]. Much simpler and robust pulsed all-semiconductor laser systems have already demonstrated exceptionally high pulse peak power and FOM of 100 W and 27 W 2 , respectively, at a wavelength of 800 nm [3], 366 W (311 W 2 ) at 922 nm [4], 1.4 kW (271 W 2 ) at 975 nm [5], 2.5 kW (1281 W 2 ) at 830 nm [6], and 6.5 kW (5233 W 2 ) at 850 nm [7]. All systems use an external-cavity configuration and employ, except of [3], pulse post-compression techniques.…”