Abstract
Spectral filtering of optical solitons has been demonstrated to squeeze their photon-number uncertainty1,2 up to a measured value of 3.8 dB.3 The squeezing has been explained in terms of an uneven spectral distribution of photon-number noise caused by the Kerr nonlinearity of the fiber.4 Some indication for correlations among different frequency components has been found in a numerical analysis.4 We present the first experimental evidence for such spectral correlations.
© 1998 Optical Society of America
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