“…This wavefront preservation has gained importance in the generation of nearly diffraction limited Raman amplified pulses with aberrated pump lasers and multi-beam pump sources (beam clean-up [28, 39^13] and beam combination [44][45][46][47] of lasers, mainly excimer lasers). Under transient Raman amplification conditions phase pulling effects have been observed (amplified Raman signal takes over the phase relation of the pump laser) [37,[48][49][50].…”
“…This wavefront preservation has gained importance in the generation of nearly diffraction limited Raman amplified pulses with aberrated pump lasers and multi-beam pump sources (beam clean-up [28, 39^13] and beam combination [44][45][46][47] of lasers, mainly excimer lasers). Under transient Raman amplification conditions phase pulling effects have been observed (amplified Raman signal takes over the phase relation of the pump laser) [37,[48][49][50].…”
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