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We have demonstrated single photon detection (for λ=1.3 μm) at a counting rate of 10 MHz. This is the highest photon counting rate ever achieved. We find that the quantum efficiency η is a weak function of the dark count rate of rd, namely, η∝(rd)0.2. These results are encouraging for possible quantum limited lightwave receiver applications.
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Levine et al. (1984) studied this question.
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