Multicolor phase-correlation interferometer for shock wave refractive index measurements
Gwendolyn T. Wang,
Yuzhe Peng,
Wenting Sun
et al.
Abstract:Refractive index measurements are critical for characterizing the properties of hypersonic flows, but moderate- to high-pressure experiments require alternative methods to traditional interferometric fringe counting. In this work, we introduce a novel, to the best of our knowledge, multi-wavelength phase-correlation interferometric technique to estimate the refractive index changes across nearly discrete shock wave boundaries and also simultaneously capture optical dispersion and vibrational relaxation times. … Show more
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