Distance measurement by the low coherent interferometer

Description

The obtained data was acquired by the interferometric fiber-optic sensor of distance. The setup was constructed of a broadband light source working at the central wavelength of 1560 nm, an optical spectrum analyzer and a fiber-optic 2x1 coupler (with the power split 50:50). All elements were connected by standard single-mode optical fibers. The measurement head was made by a polished fiber end-face and an external mirror placed parallel to the fiber, creating a Fabry-Perot cavity. The nitrogen-doped diamond film produced by a Microwave Plasma Enhanced Chemical Vapor Deposition method on a silica substrate played the role of the mirror. The diamond sample was made in the gas mixture of CH₄ (3%), H₂ (94%) and N₂(3%). Measurements of distance were performed in the range of 0 – 200 µm with a step of 20 µm. The cavity length was changed by the use of a micrometer screw. Air was fulfilling the cavity during the whole experiment.

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Year of publication:

2020

Verification date:

2020-12-17

Creation date:

2019

Dataset language:

English

Fields of science:

Automation, electronic and electrical engineering (Engineering and Technology)
materials engineering (Engineering and Technology)

DOI:

10.34808/06pn-hj67

Verified by:

Gdańsk University of Technology

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Authors

Małgorzata Szczerska prof. dr hab. inż.
Department of Metrology and Optoelectronics

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