I2和Cr3+液芯光纤中的共振吸收拉曼散射光谱研究

    Intensity of the Raman spectra can be enhanced 103 times using liquid-core optical fiber. The intensity of the Raman spectra was enhanced 106 times by the means of resonance Raman spectra. The intensity of Raman spectral lines can be increased by 109 times by the resonance Raman absorption effect in a liquid-core optical fiber. The Raman spectrum of I2 in CS2 was obtained in optical fiber (1.3m,500μm) by 37mw laser with 532nm wavelength, its concentration is 0.024g/L. A new Raman spectral line of I2 solution by resonance absorption in a liquid-core fiber was found in the experiment which was not found in the absorptive cell by resonance absorption exited. Compared spectrum of CrCl3 solution exited by resonance absorption with ruby Raman spectrum exited by resonance absorption, it is shown that appearance of characteristic peaks of Cr3+ depends on medium around it and wavelength of the exiting laser,Length of a liquid-core fibor is changed, when the fiber in which solution is CS2 and CCl4 mixture (CS2:CCl4 t:4) has its 0.83m length intensity of anti-Stokes Raman scattering line with 570.1nm wavelength exited by laser with 632.9nm has maximum value. So for the 570.1nm Raman scattering spectral line the optimum length of optical fiber with CS2 and CCl4 mixture in its core is 0.83m.