[eng] Frequency combs are astounding optical systems that aid to solve many technical and scientific
problems. Those known as kerr frequency combs rely on the non-linear kerr effect to produce combs
from a monochromatic light source in devices known as whispering gallery mode resonators. The goal
of the thesis is to characterize the effect of fluctuations and to identify the scenario under which a
series of modes around the pumping frequency are randomly excited. This result was obtained in the
laboratory and it was not previously predicted. To that extent a spatio-temporal model 1D partial
differential equation, the Lugiato - Lefever Equation, is reviewed and validated as a tool to study
the dynamics of frequency combs. Consequently the stochastic version of the model is numerically
solved, using a pseudo-spectral algorithm. Contributions come by characterizing fluctuations for
different types of noise and comparing the numerical with the experimental results, identifying the
more important mechanisms supporting such fluctuations.