A rubidium narrow bandwidth optical filter is being investigated as a device for detecting weak narrow bandwidth radiation. In our configuration, the optical filter is actively pumped (or laser excited, i.e., LEOF). This configuration has a major inherent advantage over a passive optical filter, namely, wavelength versatility. One possible limitation to the Rb LEOF is due to an intrinsic noise source caused by the energy pooling of Rb 5p atoms which are produced by the pump laser. This process, i.e., Rb (5p) + Rb (5p) ..-->.. Rb (5d) + (Rb(5s)) ..-->.. Rb (6p), produces Rb atoms in the 6p state …
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A rubidium narrow bandwidth optical filter is being investigated as a device for detecting weak narrow bandwidth radiation. In our configuration, the optical filter is actively pumped (or laser excited, i.e., LEOF). This configuration has a major inherent advantage over a passive optical filter, namely, wavelength versatility. One possible limitation to the Rb LEOF is due to an intrinsic noise source caused by the energy pooling of Rb 5p atoms which are produced by the pump laser. This process, i.e., Rb (5p) + Rb (5p) ..-->.. Rb (5d) + (Rb(5s)) ..-->.. Rb (6p), produces Rb atoms in the 6p state which subsequently emit radiation within the bandwidth of the detection channel (420-323 nm). Hence, this constitutes a noise process since photons are produced at the detector in the absence of narrow bandwidth ''signal'' radiation. Herein, we present preliminary results on kinetic studies of the energy pooling process with the ultimate goal of quantifying the process (rate constant determination) and thus assessing its implications. 4 refs., 3 figs.
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Apel, E. C.; Gosnell, T. R.; Shay, T. M. & Samadani, R.Fundamental noise processes in a laser excited optical filter,
article,
January 1, 1987;
New Mexico.
(https://digital.library.unt.edu/ark:/67531/metadc1093063/:
accessed April 23, 2024),
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