Open AccessPropagation of quantum properties of sub-picosecond solitons in a fiber
Author(s) -
Stefan Spaelter,
Mark J. Burk,
Ulrich Stroessner,
A. Sizmann,
Gerd Leuchs
Publication year - 1998
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.2.000077
Subject(s) - optics , picosecond , physics , soliton , shot noise , noise (video) , quantum noise , raman scattering , optical fiber , fiber , wavelength , broadband , materials science , raman spectroscopy , quantum , laser , nonlinear system , quantum mechanics , composite material , artificial intelligence , detector , computer science , image (mathematics)
We present new results on photon number squeezing of spectrally filtered solitons in fibers. The impact of frequency low-, high-, and bandpass filtering on noise reduction has been measured as a function of fiber length for 130-fs pulses close to the soliton energy. For short fibers our results agree qualitatively with theoretical predictions. For longer fibers, however, the measured squeezing increases to an unexpectedly large value. Filtering out the long-wavelength components of strongly Raman-shifted, higher energy pulses squeezed the directly detected photocurrent fluctuations down to 3.8+/-0,2 dB (59%) below the shot noise level. The measured noise reductions are broadband from 5 to 90 MHz.