Distance measurement by the low coherent interferometer with NND layer (the source wavelegth 1310 nm)

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 1310 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.

Figure. The measurement system: micromechanical system, fibers, source, optical spectrum analyzer.

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Non-commercial
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Details

Year of publication:

2020

Verification date:

2020-12-17

Creation date:

2018

Dataset language:

Polish

Fields of science:

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

DOI:

10.34808/hv60-tf19

Verified by:

Gdańsk University of Technology

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