Abstract

We experimentally demonstrate a new scheme for generating amplitude-squeezed solitons in an asymmetric fiber Sagnac loop. We measure by direct detection what is to our knowledge a record reduction of $5.7\pm 0.1 \mathrm{dB}$ (73%) and, with corrections for linear losses, $6.2\pm 0.1 \mathrm{dB}$ (76%) in the photon-number fluctuations below the shot-noise level. The same scheme is also shown to generate significant classical noise reduction and is limited by Raman effects in fiber.

© 1998 Optical Society of America

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