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

Masahiro Takeoka; Atsushi Uchida; Tsuneo Nakata; Fumihiko Kannari

doi:10.1117/12.273665

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

Masahiro Takeoka, Atsushi Uchida, Tsuneo Nakata, Fumihiko Kannari

Department of Electronics and Electrical Engineering

Research output: Contribution to journal › Conference article

1 Citation (Scopus)

Abstract

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 language	English
Pages (from-to)	150-157
Number of pages	8
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	2989
DOIs	https://doi.org/10.1117/12.273665
Publication status	Published - 1997 Dec 1
Event	Modeling and Simulation of Higher-Power Laser Systems IV - San Jose, CA, United States Duration: 1997 Feb 12 → 1997 Feb 12

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Keywords

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

Cite this

Takeoka, M., Uchida, A., Nakata, T., & Kannari, F. (1997). Low-threshold VUV amplification in Kr gases with a bichromatic coupling method. Proceedings of SPIE - The International Society for Optical Engineering, 2989, 150-157. https://doi.org/10.1117/12.273665

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abstract = "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.",

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AU - Kannari, Fumihiko

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AB - 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.

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KW - Lasing without population inversion

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