A 532 nm fiber-optic displacement interferometer for low-velocity impact experiments

Area of Science:

• Optics and Photonics
• Materials Science
• Experimental Physics

Background:

• Conventional fiber-optic displacement interferometers at 1550 nm exhibit limitations in temporal and velocity resolution for low-velocity measurements.
• Accurate measurement of low velocities is crucial in various scientific and engineering applications, including impact studies.

Purpose of the Study:

• To develop and demonstrate a novel fiber-optic Doppler pin system capable of overcoming the resolution limitations of existing technologies for low-velocity measurements.
• To validate the performance of the new system using low-velocity plate impact experiments.

Main Methods:

• Development of a fiber-optic Doppler pin system operating at a shorter wavelength (532 nm).
• Experimental validation using plate impact tests designed to generate low velocities.
• Comparison of performance metrics (temporal and velocity resolution) against conventional interferometers.

Main Results:

• The developed 532 nm fiber-optic Doppler pin system successfully demonstrated enhanced temporal and velocity resolution for low-velocity measurements.
• The system proved effective in characterizing low-velocity plate impact events.
• Performance metrics indicate a significant improvement over conventional 1550 nm systems for this specific application.

Conclusions:

• The novel fiber-optic Doppler pin system offers a viable solution for high-resolution low-velocity measurements.
• This instrument serves as a valuable supplement to existing measurement systems, expanding their applicability.
• The 532 nm system shows promise for advanced diagnostics in dynamic impact studies.