An alternative fiber-based method of supercontinuum generation for transient absorption spectroscopy

A novel high power, broad bandwidth (450-1750nm) probe laser has been successfully constructed and characterized for transient absorption spectroscopy. Supercontinuum pulses are generated using a nanosecond pulsed Q-switched Nd:YAG laser (1064nm, 7 ns, 20 Hz) in 15m photonic crystal fibers. High spectral quality and stable output power have been reported using this technique. The supercontinuum saturates at pulse powers of 100μW (5 μJ/pulse; 700 W pulse power).