Osnabrück 2002 – wissenschaftliches Programm
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Q: Quantenoptik
Q 112: Optische Technik I
Q 112.3: Vortrag
Montag, 4. März 2002, 14:30–14:45, HS 22/108
Stimulated Brillouin scattering in multimode fibers for optical phase conjugation — •Thomas Riesbeck1, Enrico Risse1, Hans J. Eichler1, and Anca Mocofanescu2 — 1TU Berlin, Opt. Inst., Str. des 17. Juni 135, 10623 Berlin — 2Inst. of Atomic Physics, Dept. of Lasers, P.O. Box MG-36, Bucharest 76900, Romania
Stimulated Brillouin backscattering (SBS) is studied in multimode glass fibers with core diameters between 25 µm and 200 µm. The SBS threshold, reflectivity, and damage threshold were measured. High SBS reflectivities, over than 80 % are obtained with 30 ns laser pulses, at 1.06 µm wavelength. The experimental results regarding the SBS reflectivity are compared with an analytical calculation for a plane wave model of the SBS process. The Brillouin gain coefficient of the fibers appeared to be about equal to the bulk gain coefficient.