Experimental realization of light with time separated correlations by rephasing amplified spontaneous emission
arXiv:1205.0704 · doi:10.1103/PhysRevLett.109.093602
Abstract
Amplified spontaneous emission is a common noise source in active optical systems, it is generally seen as being an incoherent process. Here we excite an ensemble of rare earth ion dopants in a solid with a π-pulse, resulting in amplified spontaneous emission. The application of a second π-pulse leads to a coherent echo of the amplified spontaneous emission that is correlated in both amplitude and phase. For small optical thicknesses, we see evidence that the amplified spontaneous emission and its echo are entangled.
6 pages, 5 figures, the supplementary information pdf was uploaded with latex source files. This version accepted for publication in PRL
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