RAMSEY FRINGES USING TRANSITIONS IN THE VISIBLE AND 10 µm SPECTRAL REGIONS : EXPERIMENTAL METHODS Ch. Salomon, Ch. Bréant, Ch. J. Bordé and R.L. Barger J. Phys. Colloques, 42 C8 (1981) C8-3-C8-14 DOI: 10.1051/jphyscol:1981801