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

Megaopto Company, Ltd., RIKEN Cooperation Center W415, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
Applied Optics (Impact Factor: 1.69). 04/2009; 48(9):1668-74. DOI: 10.1364/AO.48.001668
Source: PubMed

ABSTRACT 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.