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Phys. Rev. A 56, 4187 - 4192 (1997)

Robust transmission and reconstruction of fragile optical states

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T. C. Ralph
Department of Physics, Faculty of Science, The Australian National University, Australian Capital Territory 0200, Australia

Received 16 April 1997

We propose a scheme by which signals carried by a coherent optical source close to the quantum noise limit can be amplified, making them more robust against losses, and then reconstructed at a remote site. The amplitude signal-to-noise ratio, the absolute amplitude noise level, and optical coherence are preserved. The scheme utilizes electro-optic feedforward and laser injection locking. We investigate the performance of the scheme as a quantum nondemolition device.


©1997 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.56.4187
DOI: 10.1103/PhysRevA.56.4187
PACS: 42.50.Lc, 42.55.-f, 42.60.Da

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