Coherent population trapping detector

Details Coherent population trapping detector Coherent population trapping detector

2006-01-31

2006-01-31

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Particular resonant cavity

Specified cavity component

C372S032000, C331S003000, C331S094100

Reexamination Certificate

active

06993058

ABSTRACT:
A CPT detector and a method for detecting CPT are disclosed. The CPT detector includes a quantum absorber, a polarization analyzer, and a detector. The quantum absorber includes a material having first and second low energy states coupled to a common high energy state. Transitions between the first low energy state and the common high energy state and between the second low energy state and the common high energy state are induced by electromagnetic radiation having a predetermined polarization state. The polarization analyzer blocks electromagnetic radiation of the predetermined polarization while passing electromagnetic radiation having a polarization state that is orthogonal to the predetermined polarization. The polarization analyzer is irradiated with a portion of the generated electromagnetic radiation that has passed through the quantum absorber. The detector generates a signal related to the intensity of electromagnetic radiation that leaves the polarization analyzer.

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