Measuring refractive index profiles of integrated LiNbO<sub>3</sub> waveguides

Barbara Groebli; Bernard Gisin; Nicolas Gisin; Hugo Zbinden

doi:10.1117/12.200614

1 August 1995 Measuring refractive index profiles of integrated LiNbO₃ waveguides

Barbara Groebli, Bernard Gisin, Nicolas Gisin, Hugo Zbinden

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Optical Engineering, Vol. 34, Issue 8, (August 1995). https://doi.org/10.1117/12.200614

Abstract

A nondestructive technique that provides near-field measurements as well as refractive index profiles and geometry of waveguides in LiNbO₃ within a few minutes is demonstrated. It is a modification of the refracted-near-field (RNF) method well known for optical fiber characterization. Spatial resolution below 1 μm is achieved. The index resolution is about 2 x 10^-4, the reproducibility better than 7%. A new calibration method for RNF measurement is introduced.

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Barbara Groebli, Bernard Gisin, Nicolas Gisin, and Hugo Zbinden "Measuring refractive index profiles of integrated LiNbO₃ waveguides," Optical Engineering 34(8), (1 August 1995). https://doi.org/10.1117/12.200614

Published: 1 August 1995

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