A scientific school for the study of the Raman effect was established at the university in the mid-1950s, long before the discovery of lasers and the possibility of amplification optical signals by stimulated Stokes radiation in optical fibers was predicted as early as the late 1970s. Now the research results on fundamental features of fiber Raman amplification (Raman gain profile, pump threshold power, response time function) are used to optimize the operating modes of photonics devices using different types of single-mode fibers.
The background of the multimode decomposition technique of complex spectra is worked out and the advantages of using Gaussian functions for decomposition is proved by numerical calculations. As an application result of the Gaussian decomposition in telecommunication fibers there are presented 10 modes envelope of the Raman gain profiles in TrueWaveRS fiber (a), multiband lasing spectra in TiO2 doped SMF (b) and its comparison with GeO2 doped SMF (c).
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