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4 January 2008 Study on resonance absorption Raman scattering in I2 liquid-core optical fiber
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The Raman scattering of I2 liquid-core optical fiber under the condition of resonance absorption in liquid-core optical fiber is studied in this paper. Iodine is dissolved in transparent benzene to make solution of I2 in benzene, and the absorption coefficients of the solution are measured at certain wavelengths. The absorption curve can be divided into non-resonance absorption region, pre-resonance absorption region, strict resonance absorption region, and post-resonance absorption region respectively. Resonance absorption Raman scattering experiments are conducted by a 532 nm frequency-doubled Nd:YVO4 laser, and the wavelength is in the strict resonance absorption region of solution of I2 in benzene. Compared with I2, the absorption of benzene can be neglected. Non-resonance Raman scattering of the solution is performed using a 632.8 nm He-Ne laser, and no spectrum lines of I2 are found. The study demonstrates that there is one spectrum line of I2 in the Raman scattering spectrum in the I2 liquid-core optical fiber, but this line is not found in the spectrum of the non-resonance and resonance absorption Raman scattering of I2 solution in benzene using absorption cell. The experiments proved that I2 Raman scattering, is greatly enhanced by using both resonance absorption and liquid-core optical fiber.
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Wan Yi, Xilin Zhu, Wenhui Fang, and Hanwei Yi "Study on resonance absorption Raman scattering in I2 liquid-core optical fiber", Proc. SPIE 6839, Nonlinear Optics: Technologies and Applications, 68390M (4 January 2008);

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