In this article we present burst-mode nitric oxide laser-induced fluorescence (LIF) measurements at 250 kHz probing the first 500
sevolution of a nanosecond repetitively pulsed discharge in the spark regime. The discharge energy was varied from 140 Jto 180 Jby adjusting the excitation voltage. The probe laser beam at 226 nm was produced by doubling the 452 nm output of an optical parametric oscillator (OPO) pumped by 355 nm output of a burst-mode laser. It was observed that the nitric oxide produced by the discharge developed a toroidal distribution around the electrode central axis over the first 200 safter the last spark discharge with the maximum local nitric oxide concentration of 1.81024 m3. The expansion of the toroidal distribution was tracked over time and space by the pulse-burst laser pumped OPO system for the first time.