Theoretical studies of coherent amplification of ultrashort laser pulses in an XeCl laser medium

F. Kannari, M. Obara

Research output: Contribution to journalConference article

2 Citations (Scopus)

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 ir-pulse-like pulse. Since a pulse area necessary for the production of a 2irpulse- 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 ir-pulse-like pulse is generated instead of a 2IT-pulse-like pulse. The laser pulse width is shortened by the TT or 2 IT-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.

Original languageEnglish
Pages (from-to)175-184
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume1045
DOIs
Publication statusPublished - 1989 May 31
EventModeling and Simulation of Laser Systems 1989 - Los Angeles, United States
Duration: 1989 Jan 151989 Jan 20

Fingerprint

Ultrashort Laser Pulses
Ultrashort pulses
Amplification
Laser pulses
Laser
Lasers
pulses
lasers
Short Pulse
pulse duration
Maxwell equations
Saturation
saturation
Beat
Energy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

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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 ir-pulse-like pulse. Since a pulse area necessary for the production of a 2irpulse- 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 ir-pulse-like pulse is generated instead of a 2IT-pulse-like pulse. The laser pulse width is shortened by the TT or 2 IT-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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N2 - 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 ir-pulse-like pulse. Since a pulse area necessary for the production of a 2irpulse- 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 ir-pulse-like pulse is generated instead of a 2IT-pulse-like pulse. The laser pulse width is shortened by the TT or 2 IT-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.

AB - 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 ir-pulse-like pulse. Since a pulse area necessary for the production of a 2irpulse- 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 ir-pulse-like pulse is generated instead of a 2IT-pulse-like pulse. The laser pulse width is shortened by the TT or 2 IT-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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