Abstract
We calculate the probability distribution P( W) for the energy W generated by steady-state stimulated Raman scattering (SRS) during a time interval of duration T. For short intervals large energy flucuations are predicted, while for intervals longer than the coherence time the fluctuations disappear. The behavior of the probability distribution for interval durations comparable to the coherence time is governed by the shape of the SRS power spectrum, which is found to be lorentzian for small gains and gaussian for large gains. The results are also applicable to amplified spontaneous emission and the output of a cw laser with a large number of independent modes.
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