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01326 am a22001573u 4500 |
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46862 |
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|a Kruglov, V.I.
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|a Peacock, A.C.
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|a Harvey, J.D.
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|a Dudley, J.M.
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|a Self-similar propagation of parabolic pulses in normal-dispersion fiber amplifiers
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|c 2002-03.
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|z Get fulltext
|u https://eprints.soton.ac.uk/46862/1/46862-01.pdf
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|a Pulse propagation in high-gain optical fiber amplifiers with normal group-velocity dispersion has been studied by self-similarity analysis of the nonlinear Schrödinger equation with gain. For an amplifier with a constant distributed gain, an exact asymptotic solution has been found that corresponds to a linearly chirped parabolic pulse that propagates self-similarly in the amplifier, subject to simple scaling rules. The evolution of an arbitrary input pulse to an asymptotic solution is associated with the development of low-amplitude wings on the parabolic pulse whose functional form has also been found by means of self-similarity analysis. These theoretical results have been confirmed with numerical simulations. A series of guidelines for the practical design of fiber amplifiers to operate in the asymptotic parabolic pulse regime has also been developed.
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