Investigation of SBS pumped with a broadband KrF laser
The characteristics of stimulated Brillouin scattering reflectivity and pulse compression ratio for broadband (15GHz) KrF laser radiation pump in SF 6 gas are investigated numerically and experimentally in this paper. It has obtained that a peak reflectivity of 40% and 45% has been measured at 1.6MPa with lenses of focal length 15cm and 30cm, respectively, and a saturated region of SBS reflectivity is discovered at pump energy above 60mJ. SBS pulse compression ratio decreases with pump energy at 0.85MPa.and the maximum of pulse compression ration measured is 5. SBS numerical mode for a broadband multimode KrF laser pump has been built up in this paper. The basic premises of the mode are that SBS arises from each laser line with coupling to some extent. In this paper numerical results have been obtained and are compared to experimental results.