The study of the structure of turbulent flames, the basis of which is summarized in the first part of this article, requires numerous experimental results. To do so, we made an experimental study, of which we present only a qualitative aspect in the second part of this article. These experimental proceedings used a tomographic laser method which enabled us to visualize local and instantaneous isothermal lines within seeded premixed or diffusion flames obtained by means of a bunsen burner. To establish the influence of the turbulence on the structure of the flame, we used different speeds up to 8 m/s.