Measurement of refractive index of K9 glass with the third-order harmonic method

GUO Zeqin; SHI Yanchao; ZHAO Peixi; HU Bitao

doi:10.7510/jgjs.issn.1001-3806.2014.01.028

The refractive index of K9 glass was measured with the third-order harmonic technique, in which two parallel femtosecond laser beams with equal energy were involved. In addition, theoretical analysis and experimental verification were performed, and the refractive index of K9 cylindrical mirror and the measurement accuray were obtained by processing the experimental data before and after putting the sample into the light path. Furthermore, the refractive index of two pieces of attenuators has also been measured. It turned out that the measured refractive index of the sample was in good agreement with the actual data, which verified the validity of this technique to measure the linear refractive index of materials. Compared with the traditional measuring methods, this technique can be operated simply, which has no limit on the range of the refractive index, and the sample is processed easily. Thus, the method of third-order harmonic has very important practical value.

Measurement of refractive index of K9 glass with the third-order harmonic method

Corresponding author: HU Bitao, hubt@lzu.edu.cn

1. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China

Received Date: 2013-03-29

Accepted Date: 2013-05-04

Available Online: 2014-01-25

Abstract: The refractive index of K9 glass was measured with the third-order harmonic technique, in which two parallel femtosecond laser beams with equal energy were involved. In addition, theoretical analysis and experimental verification were performed, and the refractive index of K9 cylindrical mirror and the measurement accuray were obtained by processing the experimental data before and after putting the sample into the light path. Furthermore, the refractive index of two pieces of attenuators has also been measured. It turned out that the measured refractive index of the sample was in good agreement with the actual data, which verified the validity of this technique to measure the linear refractive index of materials. Compared with the traditional measuring methods, this technique can be operated simply, which has no limit on the range of the refractive index, and the sample is processed easily. Thus, the method of third-order harmonic has very important practical value.

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Reference (15)

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Measurement of refractive index of K9 glass with the third-order harmonic method

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