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- W2049536474 abstract "Laser produced plasma EUV source is the candidate for high quality, 115 W EUV light source for the next generation lithography. Cost effective laser driver is the key requirement for the realization of the concept as a viable scheme. A CO 2 laser driven LPP system with a Xenon droplet target is therefore a promising light source alternative for EUV. We are developing a high power and high repetition rate CO 2 laser system to achieve 10 W intermediate focus EUV power. High conversion efficiency (CE) from the laser energy to EUV in-band energy is the primarily important issue for the concept to be realized. Numerical simulation analysis of a Xenon plasma target shows that a short laser pulse less than 15 ns is necessary to obtain a high CE by a CO 2 laser. This paper describes on the development of a CO 2 laser system with a short pulse length less than 15 ns, a nominal average power of a few kW, and a repetition rate of 100 kHz, based on RF-excited, axial flow CO 2 laser amplifiers. Output power of 1 kW has been achieved with a pulse length 15 ns at 100 kHz repletion rate in a small signal amplification condition with P(20) single line. The CO 2 laser system is reported on the conceptual design for a LPP EUV light source, and amplification performance in CW and short pulse using RF-excited axial flow lasers as amplifiers. Additional approach to increase the amplification efficiency is discussed." @default.
- W2049536474 created "2016-06-24" @default.
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- W2049536474 date "2006-02-09" @default.
- W2049536474 modified "2023-09-23" @default.
- W2049536474 title "High power and short pulse RF-excited CO 2 laser MOPA system for LLP EUV light source" @default.
- W2049536474 doi "https://doi.org/10.1117/12.645607" @default.
- W2049536474 hasPublicationYear "2006" @default.
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