ABSTRACT
Continuously tunable, narrow-band radiation is generated in Hg vapor from the 11(p) (1)P(1) transition at 1220 A, through the series limit at 1187.9 A, and on out to 1174 A. This range includes the resonance transitions of neutral atomic hydrogen, deuterium, nitrogen, and xenon, some absorption profiles of which are presented.
ABSTRACT
When 1182-A radiation is generated by frequency tripling in xenon, interference is observed between the radiation generated at the two orthogonal-line foci that result from the astigmatism introduced by the focusing optics. Effects produced by a rotation of the focusing lens of only 2 degrees or even less from the normal plane may elucidate experimental curves in the literature that deviate from the expected F'(bDeltak) dependence at higher pressures and that are usually attributed to the presence of higher-order spatial modes. The modulation persists when the xenon is phase matched with either krypton or argon.
ABSTRACT
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 producing radiation at 2085 and 1833 A, are reported.
ABSTRACT
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.
ABSTRACT
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 of the furnace are discussed, and typical spectra showing extended series in barium, calcium, thallium, and radium are presented.
