Abstract.
Raman solitons propagated in the anomalous-dispersion regime in a 5-m standard-dispersion single-mode optical fibre are studied by real-time acquisition of traces of two-photon-absorption frequency-resolved optical gating at wavelengths around 1500 nm. Rapid wavelength scanning based on a counter-rotating mirror is invented to realise real-time spectrogram measurements under background-free lock-in detection using a single-channel photodiode. The measurement period in this method is 1.8 s for a spectrogram of 128×128 pixels. Intuitive spectrograms of a fibre Raman soliton and a pedestal are acquired at various peak powers of an incident optical pulse to analyse walk-off of the fundamental-mode Raman soliton. The soliton walk-off is limited by 2nd-order chromatic dispersion in the fibre. A dispersion parameter of 9.3 ps/nm/km is obtained from the wavelength dependence of the soliton walk-off.
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Received: 18 September 2001 / Revised version: 17 October 2001 / Published online: 20 June 2002
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Ogawa, K., Pelusi, M. Real-time spectrogram measurements of fibre Raman solitons. Appl Phys B 74 (Suppl 1), s93–s96 (2002). https://doi.org/10.1007/s00340-002-0890-z
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DOI: https://doi.org/10.1007/s00340-002-0890-z