Non-linear spectroscopy of isotopic acetylene at lambda=1.5 mu m for absolute frequency stabilization of diode-pumped Er-Yb : glass laser

Non-linear spectroscopy of the acetylene molecule has been performed in the wavelength range from 1536 nm to 1550 nm, by means of a novel diode-pumped Er-Yb:glass laser with single frequency emission. Zn order to saturate the acetylene lines, the gas sample was placed within an external high finesse resonator.