Determination of the parameters of frequency fluctuations of a pulse-periodic diode laser

An investigation was made of fluctuations of the output frequency of a pulsed diode laser emitting at ≈ 10 μ. An analysis of signals transmitted by a Fabry–Perot interferometer made it possible to determine the frequency dispersion Δ ν_l ≈2.5 MHz for a normal distribution law and also the correlation time of frequency fluctuations, which was 0.2 μsec.