F S Tomkins

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Mercury vapor has been used as a nonlinear frequency upconverting medium to generate peak powers of 5 kW at 1251 A in a bandwidth of 0.04 cm(-1) with a 10-Hz tunable system. The energy conversion efficiency is 0.3%. Parametric oscillation at the Hg resonance wavelength of 1849 A, as well as two other tunable (2omega(1)-omega(2)) frequency-mixed signals(More)
A miniaturized King-type furnace has been constructed, which consists of an inductively heated, small diameter tantalum tube supported in a radiation shield of unconventional design. Because of the clean construction, useful metal vapor absorption spectra can be obtained using samples weighing only a few milligrams. Details of the construction and operation(More)
Radiation was generated between 1210 and 1230 A by four-wave sum mixing in beryllium vapor where the 2s(2)(1)S-2s3d(1)D transition was two-photon resonant. Results indicate that beryllium will be an efficient nonlinear medium in this spectral region with improvements to the stability of the furnace to allow phase matching and operation at higher pressures.
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