Computer controlled femtosecond optical delay line for ultrafast optics and spectroscopy

A computer controlled optical delay line for experiments in ultrafast laser optics and spectroscopy has been fabricated. Spatial resolution of 0.5 μm and an optical resolution of 16 fs have been obtained from the set up. An ultrafast decay of 50 ps for the relaxation of an organic dye has been recorded using this set up as an example. Fabrication details of this economical and indigenous PC-controlled optical delay line along with the software requirement are presented here.