Efficient signal recovery from pulsed lasers

This paper is complementary to a recent work [Kumar et al., Rev. Sci. Instrum. 54, 463 (1983)] that described a simple, inexpensive technique for correcting laser-induced, pulsed signals for fluctuations of the individual laser excitation pulses. This inexpensive pulse-by-pulse correction technique, based on analog circuitry, exhibits an improved time-constant characteristic and is applicable to both linear and nonlinear processes. Circuit details are presented here and the versatility of the technique is illustrated by laser optogalvanic spectroscopy of the iodine molecule. m