SMALL-SIGNAL GAIN MEASUREMENTS AT THE CENTER LINE IN A C.W. DF LASER M. Gastaud, F. Voignier, P. Bousselet et P. RegnierJ. Phys. Colloques, 41 C9 (1980) C9-263-C9-267DOI: https://doi.org/10.1051/jphyscol:1980935