Deep- To near-ultraviolet Raman frequency conversion pumped by femtosecond pulses in a hollow-core waveguide

Taku Shakano, Shin Ichi Zaitsu, Totaro Imasaka

Research output: Contribution to journalArticlepeer-review

Abstract

Broadband vibrational/rotational Raman generation ranging from deep ultraviolet (DUV) to blue wavelengths is demonstrated by using molecular hydrogen in a hollow-core waveguide as a Raman-active medium pumped by a femtosecond DUV laser. We find the high-order transient stimulated Raman scattering is drastically enhanced for input beams including a circularly polarized component; a circularly polarized input beam achieves the highest conversion efficiency. Coherent vibrational anti-Stokes Raman emission is observed only for a circularly polarized pump beam, indicating that the waveguide effect also contributes to the upconversion of a DUV pulse via transient stimulated Raman scattering.

Original languageEnglish
Pages (from-to)6962-6970
Number of pages9
JournalApplied Optics
Volume60
Issue number23
DOIs
Publication statusPublished - Aug 10 2021

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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