Observation of gain due to coherence effects in a potassium-helium mixture

Autor:	J. A. Kleinfeld, A. D. Streater
Rok vydání:	1994
Předmět:	Physics chemistry Electromagnetically induced transparency Excited state Potassium chemistry.chemical_element Atomic physics Population inversion Lasing threshold Atomic and Molecular Physics and Optics Spectral line Helium Coherence (physics)
Zdroj:	Physical Review A. 49:R4301-R4304
ISSN:	1094-1622 1050-2947
DOI:	10.1103/physreva.49.r4301
Popis:	We report steady-state gain due to coherence effects in a potassium-helium mixture, for strong pumping near the ${\mathit{D}}_{2}$ line and probing near the ${\mathit{D}}_{1}$ line. The absorption-gain spectra are in good agreement with a four-level Raman-driven, lasing with inversion model, where collisional transfer populates the probed excited state. Using parameters corresponding to the experimental conditions, the model predicts gain without bare-state population inversion by a large margin.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1a0e24dd25bc033009553f8e58fcde1 https://doi.org/10.1103/physreva.49.r4301 Zobrazit plný text záznamu