Experimental observation of a coherently induced transparency on a blue probe in a Doppler-broadened mismatched V-type system

An experimental observation of transparency on a transition in the blue spectral region, induced by a continuous-wave (cw) infrared coupling field in a Doppler-broadened medium, is presented. This experimental result is supported by extensive theoretical modeling of the system, a V-type scheme in atomic rubidium vapor. Transparency is observed by a 422-nm probe field on the transition between the hyperfine split ground state 5S1/2 and the excited state 6P1/2. The coupling laser is employed on the linked transition 5S1/2-5P3/2, inducing significant levels of transparency $(>70%)$ nondissipatively and in the absence of optical pumping effects.