Megahertz-rate shock-wave distortion cancellation via phase conjugate digital in-line holography

Journal Article · 27 February 2020 · Nature Communications

DOI: https://doi.org/10.1038/s41467-020-14868-y · OSTI ID:1619579

Mazumdar, Yi Chen; Smyser, Michael E. ; Heyborne, Jeffery D.; Slipchenko, Mikhail N. ; Guildenbecher, Daniel R.

Abstract Holography is a powerful tool for three-dimensional imaging. However, in explosive, supersonic, hypersonic, cavitating, or ionizing environments, shock-waves and density gradients impart phase distortions that obscure objects in the field-of-view. Capturing time-resolved information in these environments also requires ultra-high-speed acquisition. To reduce phase distortions and increase imaging rates, we introduce an ultra-high-speed phase conjugate digital in-line holography (PCDIH) technique. In this concept, a coherent beam passes through the shock-wave distortion, reflects off a phase conjugate mirror, and propagates back through the shock-wave, thereby minimizing imaging distortions from phase delays. By implementing the method using a pulse-burst laser setup at up to 5 million-frames-per-second, time-resolved holograms of ultra-fast events are now possible. This technique is applied for holographic imaging through laser-spark plasma-generated shock-waves and to enable three-dimensional tracking of explosively generated hypersonic fragments. Simulations further advance our understanding of physical processes and experiments demonstrate ultra-high-speed PCDIH techniques for capturing dynamics.

• Sponsoring Organization: USDOE
• Grant/Contract Number: NONE; NA0003525
• OSTI ID: 1619579
• Alternate ID(s): OSTI ID: 1624254
• Journal Information: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 11; ISSN 2041-1723
• Publisher: Nature Publishing GroupCopyright Statement
• Country of Publication: United Kingdom
• Language: English