Abstract
There is both theoretical and practical interest in understanding the competition between noise and signal in a Raman amplifier. We have previously studied the effect of spatial and temporal noise on the amplification of low-level input Stokes signals in transient Raman amplifiers with pump linewidths comparable to or wider than the gain narrowed Raman linewidth.[1] Those studies have verified that noise levels exist at one photon per spatial-temporal mode in the vacuum noise field and images with signal-to-noise ratios of unity have been obtained with real input signals near one photon per spatial-temporal mode of the amplifier.
© 1992 IQEC
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