Precision measurements of the line profile by the diode laser spectroscopic method

Problems of the precision measurements of spectral line parameters by diode -laser spectroscopic methods were examined. The instrumental function of a diode laser spectrometer was investigated in detail. The knowledge of the l atter makes it possible to solve correctly the problem of the 'optical zero ' and to reconstruct the true line profile with an error less than 1%. The instrumental function of a diode laser spectrometer was determined for the example of a laser diode emitting radiation at the wavelength lambda = 1.53 mu m. The function represents the convolution of two Lorentzian functions with the characteristic half-widths Delta v(1) and Delta g, which vary not only from mode to mode but also within the limits of a single radiation mod e.