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Atomic resonance filters

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1 Author(s)
Gelbwachs, J.A. ; Aerospace Corp., Los Angeles, CA, USA

The atomic resonance filter (ARF) is an ultranarrowband (Q~105-106), large-acceptance-angle, isotropic optical filter. These features make the device ideally suited for applications in which weak laser signals are detected against a continuum background. The filter properties arise from the physical processes of absorption, emission, and internal energy conversion in atomic vapors. The characteristics of the ARF are described and the underlying physics that governs the operation is discussed. Representative examples of passive, active, and IR filters are presented. A metastable ARF that offers improved solar background-limited performance by filtering signals at Fraunhofer wavelengths is described

Published in:

Quantum Electronics, IEEE Journal of  (Volume:24 ,  Issue: 7 )