The output of an alkali vapor lamp for use in an optical pumping system is stabilized by use of a feedback circuit which regulates current flow from a power supply to an electronic power oscillator used to excite the alkali vapor lamp. Starting of the alkali vapor lamp is facilitated by increasing supply...http://www.google.com.au/patents/US4721890?utm_source=gb-gplus-sharePatent US4721890 - Power supply circuit for an alkali vapor spectral lamp
