When a laser pulse is focused to a sufficiently small spot size, a bright spot appears at the focal point due to breakdown of the surrounding gases [4, 5, 6, 7]. There are four different mechanisms by which laser light can interact with a combustible mixture to generate plasma: (a) Thermal initiation, (b) Photochemical ignition, (c) Resonant ignition, and (d) Non-resonant ignition [8]. Non-resonant breakdown of gases is more favorable in engine applications because it does not require a close match between the laser wavelength and the target gas molecules [9]. In this experimental investigation, LI was achieved through non-resonant mechanism.