Measurement of the refractive index by using a rectangular cell with a fs-laser engraved diffraction grating inner wall

A very simple method to obtain the refractive index of liquids by using a rectangular glass cell and a diffraction grating engraved by fs laser ablation on the inner face of one of the walls of the cell is presented. When a laser beam impinges normally on the diffraction grating, the diffraction ord...

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