Theoretical Studies Of Coherent Amplification Of Ultrashort Laser Pulses In An XeCL Laser Medium

F. Kannari; M. Obara

doi:10.1117/12.951323

31 May 1989 Theoretical Studies Of Coherent Amplification Of Ultrashort Laser Pulses In An XeCL Laser Medium

F. Kannari, M. Obara

Proceedings Volume 1045, Modeling and Simulation of Laser Systems; (1989) https://doi.org/10.1117/12.951323
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Coherent amplifications of short pulse XeCl lasers are theoretically studied using multi-level Maxwell-Bloch equations including real vibrational-rotational structures of a gain spectrum of XeCl. The model can successfully predict coherent effects such as the quantum beat caused by spectrum overlaptions of several vibrational-rotational transitions involved in the short pulse laser spectrum. Saturation of amplified energy caused by formation of a 2 π-pulse-like pulse. Since a pulse area necessary for the production of a 2π-pulse-like pulse which depletes all the upper state populations accessible to the laser spectrum depends on the laser pulse width, an effective saturation energy is a function of the laser pulse width. When absorption in the amplifier media is not negligible to the small-signal gain, an effective u-pulse-like pulse is generated instead of a 2π-pulse-like pulse. The laser pulse width is shortened by the π or 2π-pulse-like pulse formation, and even shorter pulses than the linear limitation defined by the gain spectrum width can be generated if the amplified pulse intensity becomes very strong.

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F. Kannari and M. Obara "Theoretical Studies Of Coherent Amplification Of Ultrashort Laser Pulses In An XeCL Laser Medium", Proc. SPIE 1045, Modeling and Simulation of Laser Systems, (31 May 1989); https://doi.org/10.1117/12.951323

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