Enhanced stimulated Raman scattering during intense laser propagation
Abstract
Stimulated Raman scattering is ubiquitous in many high-intensity laser environments. Parametric four-wave mixing between the pump and Raman sidebands can affect the Raman gain, but stringent phase matching requirements and strongly nonlinear dynamics obscure clear understanding of its effects at high laser powers. Here we investigate four-wave mixing in the presence of strong self-focusing and weak ionization at laser powers above the Kerr critical power. Theoretical analysis shows that the plasma generated at focus naturally leads to phase matching conditions suitable for enhanced Raman gain, almost without regard to the initial phase mismatch. Multidimensional nonlinear optical simulations with multiphoton and collisional ionization confirm the enhancement and suggest that it may lead to significantly higher Raman losses in some high-intensity laser environments.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 09, 2022
- Source ID
- 10.1364/oe.474104
Entities
People
- Antonio Ting
- Bahman Hafizi
- D. Gordon
- J Ryan Peterson
- Luke A. Johnson
- T. G. Jones
- Yu-hsin Chen
Organizations
- MITRE Corporation
- National Nuclear Security Administration
- National Science Foundation
- SLAC National Accelerator Laboratory
- Stanford University
- United States Naval Research Laboratory