Low-threshold VUV amplification in Kr gases with a bichromatic coupling method

Masahiro Takeoka, Atsushi Uchida, Tsuneo Nakata, Fumihiko Kannari

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


We propose and analyze a novel low-threshold amplification scheme by bichromatically coupling three upper states including a metastable state. We numerically show that it is possible to amplify VUV emission in Kr gases without population inversion at the probe transition. It is shown that the origin of low-threshold gain is the population trapping of upper states dressed by two intense coupling lasers, and there is a possibility of forming large population inversion in optically dressed systems.

Original languageEnglish
Pages (from-to)150-157
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1997
EventModeling and Simulation of Higher-Power Laser Systems IV - San Jose, CA, United States
Duration: 1997 Feb 121997 Feb 12


  • Dressed state
  • Kr gases
  • Lasing without population inversion
  • Population trapping
  • Quantum interference
  • Two-photon coherence
  • VUV radiation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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