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 5S(1/2) and the excited state 6P(1/2). The coupling laser is employed on the linked transition 5S(1/2)-5P(3/2), inducing significant levels of transparency (>70%) nondissipatively and in the absence of optical pumping effects. [S1050-2947(98)00402-8].