K. Obermann, S. Kindt, I. Koltchanov, D. Breuer, K. Petermann, S. Diet, R. Ludwig, H. Weber
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Amplified spontaneous emission noise of wavelength converters exploiting cross-gain and cross-phase modulation in semiconductor-laser amplifiers
The amplified spontaneous emission of a saturated semiconductor-laser amplifier is studied analytically and experimentally for co- as well as counterpropagating input waves. It is shown, that copropagating injection can significantly reduce the noise level.