Ke Ou

All Publications

• Entropy-mode-driven gas optics PHYSICAL REVIEW APPLIED Michel, P., Oudin, A., Rajesh, H., Ou, K., Chakraborty, D., Cao, S., Kur, E., Lancia, L., Ghosh, D., Riconda, C., Wurtele, J. S., Edwards, M. R. 2026; 25 (2)

  View details for DOI 10.1103/pnhn-w6tl

  View details for Web of Science ID 001692984500003

• PIAFS: A 2D nonlinear hydrodynamics code to model gaseous optics PHYSICS OF PLASMAS Oudin, A., Ghosh, D., Riconda, C., Lancia, L., Kur, E., Ou, K., Perez-Ramirez, V. M., Lee, J., Edwards, M. R., Michel, P. 2025; 32 (7)

  View details for DOI 10.1063/5.0268318

  View details for Web of Science ID 001551064500002

• High-energy transient gas pinholes via saturated absorption OPTICS LETTERS Ou, K., Perez-ramirez, V. M., Cao, S., Redshaw, C., Lee, J., Wang, M. M., Mikhailova, J. M., Michel, P., Edwards, M. R. 2025; 50 (4): 1309-1312

  Abstract

  This Letter presents a spatial filter based on saturated absorption in gas as an alternative to the solid pinhole in a lens-pinhole-lens filtering system. We develop an analytic model that describes this process and demonstrate spatial filtering with simulations and experiments. We show that an ultraviolet laser pulse focused through ozone will have its spatial profile cleaned if its peak fluence rises above the ozone saturation fluence. Specifically, we demonstrate that a 5 ns 266 nm beam with 4.2 mJ of the initial energy can be effectively cleaned by focusing through a 1.4% ozone-oxygen mixture, with about 76% of the main beam energy transmitted and 89% of the sidelobe energy absorbed. This process can be adapted to other gases and laser wavelengths, providing alignment-insensitive and damage-resistant pinholes for high-repetition-rate high-energy lasers.

  View details for DOI 10.1364/OL.547141

  View details for Web of Science ID 001470423300010

  View details for PubMedID 39951790