Self-Mixing Interferometer Based on Frequency Analysis Method for Accurate Refractive Index Measurement
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 determi...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2016-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/7389325/ |
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| Summary: | 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 <inline-formula> <tex-math notation="LaTeX">$1.0\times 10^{-4}$</tex-math></inline-formula> is achieved experimentally. This method has found that there exists an optimal velocity to achieve minimum error of refractive index measurement. |
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| ISSN: | 1943-0655 |