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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1991),
  • paper CTuW48

Self-phase modulation and spatial chirping in a regenerative amplifier

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Abstract

Self-phase modulation (SPM) in a Kerr medium has been widely used to chirp an optical pulse spectrally in pulse compression.1 To compress a high-energy pulse directly, it is necessary to chirp the pulse in a bulk material. However, in a bulk medium, the spatial intensity distribution of the laser pulse results in nonuniform chirping across the spatial profile of the beam, causing the spatial chirping effect. That is, different parts of the beam have different magnitudes of frequency chirping. In the single-pass situation, the SPM temporal chirping and the spatial chirping have the same magnitudes. Spatial chirping also bends the beam wavefront, leading to self-focusing of the beam.

© 1991 Optical Society of America

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