Stimulated Raman scattering effect on femtosecond pulse generation using a parabolic amplification and a pulse compressor

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Description/Abstract

An explicit analytical form for the Stokes pulse evolution in parabolic amplification is derived for the first time. In order to achieve efficient pulse compression, the parabolic amplifiers should be operated in the small Stokes pulse regime where the signal pulse is not seriously deteriorated.

An analytical expression to obtain the critical fibre length for small Stokes pulse regime is also derived. The pulse compression of the output signal at various fiber lengths also confirms that the output signal pulse at the derived critical fiber length provides a compressed pulse with the maximum peak power and shortest pulse width. The results are verified through numerical simulations using split-step Fourier method.