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On the quantum limit of laser amplifier detectors

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1 Author(s)
A. Karlsson ; Dept. of Electron., R. Inst. of Technol., Kista, Sweden

The quantum limit of a laser amplifier used as a detector is calculated. It is shown that the amplified output can be quantum correlated to the detector readout. However, as an information tap, the amplifying detector is no better than a lossless linear beamsplitter due to the added spontaneous emission noise

Published in:

IEEE Journal of Quantum Electronics  (Volume:31 ,  Issue: 8 )