TY - JOUR
T1 - Prediction of inversionless gain in a mismatched Doppler-broadened medium
AU - Boon, J. R.
AU - Zekou, E.
AU - McGloin, D.
AU - Dunn, M. H.
PY - 1998/9
Y1 - 1998/9
N2 - Inversionless gain is predicted in a Doppler-broadened [Formula Presented] scheme for which the probe laser frequency is approximately twice that of the coupling laser. A comparison is made of inversionless gain achieved via electromagnetically induced transparency in Doppler-broadened matched and mismatched wavelength systems. We show that the presence of Doppler broadening does not preclude inversionless lasing for mismatched wavelengths; importantly, this is shown to hold even for Rabi splittings significantly less than the Doppler width. Our analysis demonstrates that inversionless gain is realizable in Doppler-broadened media, at modest continuous wave laser powers, for a probe frequency well in excess of the coupling field frequency. The presented theory is related to a practical mismatched system in atomic rubidium vapor. Approximately 8% gain is predicted in a 422 nm probe field coherently driven by a 780 nm coupling field, in the presence of a modest level of incoherent excitation.
AB - Inversionless gain is predicted in a Doppler-broadened [Formula Presented] scheme for which the probe laser frequency is approximately twice that of the coupling laser. A comparison is made of inversionless gain achieved via electromagnetically induced transparency in Doppler-broadened matched and mismatched wavelength systems. We show that the presence of Doppler broadening does not preclude inversionless lasing for mismatched wavelengths; importantly, this is shown to hold even for Rabi splittings significantly less than the Doppler width. Our analysis demonstrates that inversionless gain is realizable in Doppler-broadened media, at modest continuous wave laser powers, for a probe frequency well in excess of the coupling field frequency. The presented theory is related to a practical mismatched system in atomic rubidium vapor. Approximately 8% gain is predicted in a 422 nm probe field coherently driven by a 780 nm coupling field, in the presence of a modest level of incoherent excitation.
UR - http://www.scopus.com/inward/record.url?scp=0011777960&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.58.2560
DO - 10.1103/PhysRevA.58.2560
M3 - Article
AN - SCOPUS:0011777960
SN - 1050-2947
VL - 58
SP - 2560
EP - 2566
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 3
ER -