The picoEmerald was especially designed for the needs in CARS- and coherent RAMAN microscopy.

It comprises a high power (10W) picosecond oscillator, a frequency doubling to 532 nm and a synchronously pumped OPO (Optical Parametric Oscillator) in a single box. The optics modules were optimized by finite element analyses and mechanical stability algorithms (misalignment stability optimization) to exhibit maximum passive stability. In addition an active cavity control is maximizing continuously the efficiency of the pump laser and the OPO.

The picoEmerald supplies fully automated three temporally and spatially overlapping ultrafast pulse trains: 1064 nm out of the laser oscillator, the OPO Signal and the OPO Idler. Independent power adjustments of the 1064 nm beam and the OPO Signal and Idler, sensors for the spatial and temporal overlap and a high resolution spectrometer are included. 1064 nm pulses and OPO Idler pulses can be independently combined with the OPO Signal or blocked.

Vibrational excitation modes have a typical bandwidth of ~10 cm-¹ thus requiring picosecond excitation pulses for best spectroscopic resolution. This system delivers 7 ps at 1064 and 5 - 6 ps from the OPO to match this requirement. Optionally an amplitude modulation of the 1064 nm beam up to 10MHz is available to suppress the non resonant background by Stimulated RAMAN Scattering (SRS) or heterodyne CARS microscopy.

Downloads	Datasheet