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Journal Article

Photon number squeezing of spectrally filtered sub-picosecond optical solitons

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Citation

Spalter, S., Burk, M., Strossner, U., Bohm, M., Sizmann, A., & Leuchs, G. (1997). Photon number squeezing of spectrally filtered sub-picosecond optical solitons. EUROPHYSICS LETTERS, 38(5), 335-340. doi:10.1209/epl/i1997-00248-2.


Cite as: https://hdl.handle.net/21.11116/0000-0002-9807-B
Abstract
Photon number squeezing of spectrally filtered optical solitons has been
observed in the sub-picosecond regime, where the Raman effect changes
the internal quantum structure of each pulse. 160 fs pulses were
propagated down a 10 m optical fibre of anomalous group velocity
dispersion. At energies below the soliton energy subsequent spectral
filtering with an optical band-pass squeezed the directly detected
photocurrent fluctuations to 3.2 +/- 0.1 dB (52%) below the shot-noise
limit. This implies 4.5 dB (65%) of soliton photon number squeezing, if
detection losses are taken into account. Using a spectral edge filter
the spectral components of the pulses are shown to contribute
asymmetrically to the squeezing due to stimulated Raman scattering.