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Proceedings Paper

Development of efficient forward Raman pulse compression system for e-beam-excited KrF laser ASHURA
Author(s): Yuji Matsumoto; Eiichi Takahashi; Isao Matsushima; Isao Okuda; Yoshiro Owadano; Kenji Kuwahara
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Paper Abstract

We have developed a simple method of power multiplication. In this method, multi-path forward Raman amplifier is used. By multi-path amplification, it is possible to transfer almost all energy from long duration pump pulse to short Stokes pulse with small numbers of beams. The demonstration experiments of this method have been carried out by using a short pulse Stokes generator, a forward Raman Preamplifier and a forward Raman pulse compressor. Pump light is one of the sequential output pulses from the e-beam excited KrF laser system ASHURA. Short STokes pulse is generated in the Stokes generator filled with a mixture of methane and hydrogen gases as Raman scattering medium. The Stokes pulse is amplified to almost half of pump intensity by the Raman preamplifier also filled with same kinds of mixed scattering medium. The Raman pulse compressor is a 5-path amplifier with total Raman gain of 10. In latest experiments, the output Stokes pulse grew up to 3.2 times pump intensity by Raman conversion of pump power of 70 percent. The waveform of output Stokes was similar shot pulse as initial Stokes light.

Paper Details

Date Published: 11 January 2000
PDF: 9 pages
Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); doi: 10.1117/12.375129
Show Author Affiliations
Yuji Matsumoto, Electrotechnical Lab. (Japan)
Eiichi Takahashi, Electrotechnical Lab. (Japan)
Isao Matsushima, Electrotechnical Lab. (Japan)
Isao Okuda, Electrotechnical Lab. (Japan)
Yoshiro Owadano, Electrotechnical Lab. (Japan)
Kenji Kuwahara, Science Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 3886:
High-Power Lasers in Energy Engineering
Kunioki Mima; Gerald L. Kulcinski; William J. Hogan, Editor(s)

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