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Appl Opt. 2009 Mar 20;48(9):1668-74.

Deep UV light generation by a fiber/bulk hybrid amplifier at 199 nm.

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Megaopto Company, Ltd., RIKEN Cooperation Center W415, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.


A high-pulse-repetition-frequency (PRF) pulsed light source in the deep ultraviolet region has been realized by a multiple wavelength conversion technique using a hybrid fiber/bulk amplifier system. Output of 199 nm with a power of 50 mW was achieved at 2.4 MHz PRF. The 1 microm amplifier consisted of a Yb-doped fiber amplifier and a Nd-doped YVO(4) amplifier. A 1.5 microm fiber master-oscillator power amplifier was employed as the other fundamental source. The amplifiers exhibited good amplification properties in pulse energy, polarization extinction ratio, and spectrum for nonlinear wavelength conversion.


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