Femtosecond interferometry : absolute measurements of optical susceptibilities P. SEGONDS, L. CANIONI, L. SARGER, A. DUCASSE, C. DUCHESNE, E. FARGIN, R. OLAZCUAGA and G. LE FLEM J. Phys. IV France, 04 C4 (1994) C4-483-C4-486 DOI: 10.1051/jp4:19944116