Abstract
A new source of photon number squeezed light has been discovered recently by use of optical picosecond N > 1 solitons in a standard glass fiber.1 Spectral filtering of the outer sidebands generated from excess self-phase modulation produced an overall nonlinear input-output behavior and a 2.3 dB reduction of the photocurrent noise was observed in direct detection.1 A quantum theoretical analysis of this scheme predicted enhanced photon number squeezing with decreasing pulse width.2 In this paper we present, we believe, the first experimental demonstration of soliton photon number squeezing by spectral filtering in the subpicosecond regime, where Raman gain and higher order dispersion influence the soliton pulse dynamics.
© 1997 Optical Society of America
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