Spectrally resolved white light interferometer for measuring dispersion in the visible and near infrared range
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866913216195461120 |
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| author | Arosa, Y. Lago, E. Lopez de la Fuente, R. |
| author_facet | Arosa, Y. Lago, E. Lopez de la Fuente, R. |
| contents | We design a spectrally resolved interferometer to measure the refractive index of transparent samples over a broad spectral range between 400 and 550 nm. The measuring device consists of a Michelson interferometer whose output is analysed by means of three fibre spectrometers: a homemade prism spectrometer which obtains the interferogram generated by the sample between 400 and 1050 nm, a homemade transmission grating spectrometer that measures the interferogram in between 950 and 1550 nm, and a commercial Czerny Turner spectrometer used to make high precision measurements of the displacement between the Michelson mirrors. The whole system is illuminated by a white light source with an emission spectrum similar to that of a black body. We test the instrument on solid and liquid samples achieving accuracy of up to 0.0001 in the refractive index after fitting it with the Cauchy formula. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_17335 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spectrally resolved white light interferometer for measuring dispersion in the visible and near infrared range Arosa, Y. Lago, E. Lopez de la Fuente, R. Optics We design a spectrally resolved interferometer to measure the refractive index of transparent samples over a broad spectral range between 400 and 550 nm. The measuring device consists of a Michelson interferometer whose output is analysed by means of three fibre spectrometers: a homemade prism spectrometer which obtains the interferogram generated by the sample between 400 and 1050 nm, a homemade transmission grating spectrometer that measures the interferogram in between 950 and 1550 nm, and a commercial Czerny Turner spectrometer used to make high precision measurements of the displacement between the Michelson mirrors. The whole system is illuminated by a white light source with an emission spectrum similar to that of a black body. We test the instrument on solid and liquid samples achieving accuracy of up to 0.0001 in the refractive index after fitting it with the Cauchy formula. |
| title | Spectrally resolved white light interferometer for measuring dispersion in the visible and near infrared range |
| topic | Optics |
| url | https://arxiv.org/abs/2401.17335 |