Abstract

Isoelectronic scaling of known laser transitions to higher ion stages¹ has recently been shown to be a useful technique for scaling electron-ion recombination lasers, produced in expanding plasmas, to shorter wave-lengths². The observation of laser action on a sequence based upon the 4f-5d transition in Ag I (1832 nm), Cd II (537.8 nm) and In III (298.3 nm) is perhaps the clearest example of this technique to date.² Another sequence, based upon the 4f-3d transition in Li I (1870 nm) (recently observed in laser action in a segmented plasma arc³ device) and Be II (457.4 nm) (reported earlier⁴) suggests possible new recombination lasers in B III (207.7 nm) and C IV (116.8 nm).

© 1982 Optical Society of America