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Sensitivity of Pr+3: LaCl3infrared quantum counter

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1 Author(s)
Porter, John F. ; Carlyle Barton lab., The John Hopekins Univ., Baltimore, MD

The NEPλand response time of the Pr3+:LaCl3Infra-red Quantum Counter have been measured for the wavelengths 1.48 μ, 1.58 μ, 2.03 μ and 2.33 μ at the nominal temperatures of 300°K, 77°K, and 4.2°K. The experimental arrangement is described and suggestions for improvement are made. The best results obtained are anNEP_{2.03_mu} = 2 times 10^{-5}watts(c/s)^{-1/2}and a temperature independent response time of 20-30 ms.

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Quantum Electronics, IEEE Journal of  (Volume:1 ,  Issue: 3 )