| In this paper, Raman scattering is theoretically analysed, and mechanism of the Stokes light is researched. We made an experimentally and theoretically research on SRS at low temperature (about 80K-190K) in highly single mode circular optical fiber. The experimental apparatus is designed and the principle of experiment is given. The SRS in highly single mode circular optical fiber is measured at different temperature. A series of SRS spectra is get in low temperature. On base of the spectra, we get a curve of the frequency shift and the half breadth with the temperature fluctuation.In this paper, several series of test is did which on the temperature's fluctuation affecting the Stokes lines in low temperature. Compared with the normal temperature SRS spectra, the orderliness of how the temperature influence all levels Raman scattering spectra is gained. Compared the characteristics of double peaks in low temperature with normal temperature, a preliminary analysis is theoretically deduced. |
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