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Appl Opt. 1972 Oct 1;11(10):2311-30. doi: 10.1364/AO.11.002311.

Upconversion-a Systems View.


A review is given of the properties of birefringently phase-matched parametric upconversion using proustite as the nonlinear material. Photon conversion efficiency, field-of-view limitations, spectral acceptance bandwidths, and resolution are discussed in terms of the upconversion of radiation from the 10-mu region to wavelengths shorter than 1 mu. The competitive potential of upconversion detection systems is examined for a wide variety of sensor applications. This analysis shows that upconversion represents a special-purpose detection technology appropriate for low-duty-cycle, small field-of-view imaging systems that use laser illumination. Competitive development of upconversion to detect thermal imagery appears unlikely.

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