Stimulated Brillouin scattering of Q-switched laser pulses in large-core optical fibres

✍ Scribed by V. Pashinin; V. Sturm; V. Tumorin; R. Noll

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 131 KB
• Volume: 33
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(01)00086-x

✦ Synopsis

Q-switched Nd : glass laser pulses of 60 ns duration are transmitted through multimode fused-silica ÿbres of 0.4 -1 mm core diam and lengths of up to 20 m. For laser radiation with narrow spectral width, stimulated Brillouin scattering (SBS) is observed for energies well below the threshold energy of ÿbre damage. The SBS threshold is shifted beyond the threshold of ÿbre damage through increasing the spectral width of the laser radiation. The SBS threshold energies of step-index and gradient-index ÿbres are measured for various ÿbre and laser parameters.