The pump-probe workstation consists of a 15 cm computer-controlled delay line, with a minimum step of 0.1 μm, and a 303 mm spectrograph with a CCD imaging camera, and a lock-in amplifier. The pump beam can be selected to be either the fundamental output of a Ti:Sapphire laser amplifier at 785 nm, or te frequency doubled second harmonic, or the output of a home-built noncollinear Optical Parametric Amplifier (NOPA) at 420 nm - 750 nm.

TriENA is a hybrid system that combines three spectroscopic analytical techniques (LIBS, LED-IF, and DR) in one portable device. It is a deliverable of the CALLOS project and has been developed at the Institute of Electronic Structure and Laser of FORTH by the Photonics for Heritage Science Researchers, in collaboration with the conservators of EACA. The system is designed to meet the analytical challenges commonly encountered on Athenian monuments.

Raman spectroscopy gives details about the molecular structure of samples on the basis of the characteristic vibrational modes of the molecule. It can be used to identify a variety of materials (minerals, pigments, organics etc.) and the fact that it is completely non-destructive makes it extremely attractive for the analysis of invaluable objects, such as artworks and archaeological objects.