Abstract
The recent advance of nonlinear optical frequency conversion to the blue-green region1 has encouraged researchers to study efficient frequency conversion in other wavelength regions. Because cw UV radiation <275 nm is difficult to obtain directly from lasers, frequency doubling of blue-green cw lasers is worth studying, BBO is the best crystal for generating UV radiation because of its wide phase-matching region down to 205 nm by SHG, low optical loss, and durability.2
© 1992 Optical Society of America
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