ISSN:
1572-9559
Keywords:
Optically-pumped FIR lasers
;
Stark effect
;
Level crossing
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract In conjunction with the Stark field induced power enhancement in optically pumped far infrared lasers, absorption transitions in a degenerate two level system under the influence of an weak static Stark field have been analyed. A third order theory to the density matrix formalism leads to zero field level crossing signals for absorption in rate equation approximation and in Doppler limit. For fast relaxation among Zeeman sublevels, the zero field level crossing signal arises from population effect. Optoacoustic measurements have been carried out on the ν5,qQ(16,8) absorption line of CH3OH which produces the familiar 119-μm laser with the CO2 9P(36) pump line. The optoacoustic absorption signals observed are well reproduced by the theoretical expression.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01010818
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