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Journal of the Optical Society of America B

Long-term storage of a bit stream of pulses by stimulated Raman scattering

Evgeny A. Kuzin, J. J. Sánchez-Mondragón, V. A. Vysloukh, M. A. Meneses, Vladimir I. Belotitskii, Vasilii V. Spirin

Published Jun 1, 1997• 1 citation
Publisher

Abstract

The possibility of providing long-term storage of a binary sequence of pulses circulating in a fiber loop is discussed. The regeneration of the sequence is achieved by a fiber logic gate based on stimulated Raman scattering. Estimations show that a possible pulse repetition rate of 1010 Hz for the stimulated-Raman-scattering gate operation can be expected for an average pump power of 1 W. The circulation of the binary sequence of 100-ps pulses was observed during 10 min in a loop 870 m long. It corresponds to more than 106 round trips around the loop.

DOI
10.1364/josab.14.001345

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The possibility of providing long-term storage of a binary sequence of pulses circulating in a fiber loop is discussed. The regeneration of the sequence is achieved by a fiber logic gate based on stimulated Raman scattering. Estimations show that a possible pulse repetition rate of 1010 Hz for the stimulated-Raman-scattering gate operation can be expected for an average pump power of 1 W. The circulation of the binary sequence of 100-ps pulses was observed during 10 min in a loop 870 m long. It corresponds to more than 106 round trips around the loop.
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The method of enhancing the information capacity and reliable storage of information in circulator fiber-optic memory is presented. The method is based on creation of an additional built-in channel with contrary-directed circulation of signals. This channel can be used for transmission of both information and auxiliary signals: address words, clock signals, correcting sequences, etc. The possibility of compensating the information signal losses by means of stimulated Raman scattering is considered.
We demonstrate all-optical storage of a picosecond-pulse packet of ones and zeros in a fiber buffer in which loss is compensated by parametric amplification. An all-fiber phase-sensitive parametric amplifier, which exploits a nonlinear Sagnac loop made of standard polarization-maintaining fiber to provide gain, regenerates the stored pulses on each round-trip. Storage for periods of time tip to 1 ms has been observed. Data packets of 10's of kilobits could be stored in this device with use of a higher repetition-rate pump source.