Generation of tunable picosecond light pulses covering the frequency range between 2700 and 32,000 cm-1
The travelling-wave parametric process allows the generation of intense picosecond pulses tunable between 2700 and 17,000 cm-1. Angle- and temperature tuning was investigated using LiNbO3 crystals of different cuts. Various factors determining the bandwidth of the new pulses are evaluated and experimental spectra are presented. Frequency doubling readily leads to light pulses up to 32,000 cm-1. The jitter of two parametric systems operating in parallel is less than 1 ps for pump pulses of 7 ps.