Self-induced focusing and defocusing of femtosecond pulses in Raman-active media

Vladimir A. Isakov; Andrei P. Kanavin; Igor V. Smetanin

doi:10.1117/12.239801

10 May 1996 Self-induced focusing and defocusing of femtosecond pulses in Raman-active media

Vladimir A. Isakov, Andrei P. Kanavin, Igor V. Smetanin

Proceedings Volume 2797, Nonlinear Spectroscopy and Ultrafast Phenomena; (1996) https://doi.org/10.1117/12.239801
Event: International Conference on Coherent and Nonlinear Optics, 1995, St. Petersburg, Russian Federation

Abstract

The results of analytical and numerical investigation of the propagation of space-limited ultrashort (pulse duration is shorter than all the relaxation times and the time scale of the medium response) light pulse in Raman-active media are represented. This process shown reveals a number of novel specific features. It is found that at definite pulse energy the self- induced focusing is replaced by the self-induced defocusing which is again followed by the selffocusing. As a result a light channel which consists of a train of moving focuses occurs on the light beam axis. The rate of self-induced focusing and defocusing processes for this propagation regime is inversely proportional to the pulse field intensity, which is contrary to the conventional selffocusing theory.

Citation Download Citation

Vladimir A. Isakov, Andrei P. Kanavin, and Igor V. Smetanin "Self-induced focusing and defocusing of femtosecond pulses in Raman-active media", Proc. SPIE 2797, Nonlinear Spectroscopy and Ultrafast Phenomena, (10 May 1996); https://doi.org/10.1117/12.239801

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