Self-Mixing Interferometer Based on Frequency Analysis Method for Accurate Refractive Index Measurement

IEEE Photonics Journal

Wencai Huang¹  Chenxi Chen¹  Yingbin Wei¹  Yongbing Zhang¹  Huizhen Xu²  Xiulin Wang² 

[1] Dept. of Electron. Eng., Xiamen Univ., Xiamen, China;Dept. of Phys., Jimei Univ., Xiamen, China;

关键词: Self-mixing interference (SMI);    Refractive index;    Frequency;   

DOI  :  10.1109/JPHOT.2016.2520822

来源: DOAJ

【 摘 要 】

A new method based on self-mixing interference (SMI) for refractive index measurement by means of simply frequency analysis is proposed. The optical phase shift is implemented by translating a transparent object through a motorized stage with a setting velocity. Then, the refractive index is determined by the frequency of SMI fringes. A relative repeatability of refractive index estimated in 1.0 x 10^-4 is achieved experimentally. This method has found that there exists an optimal velocity to achieve minimum error of refractive index measurement.

【 授权许可】

Unknown