Abstract

Electromagnetically induced transparency is observed in a mismatched-wavelength cascade system with a room-temperature rubidium vapor cell. A cw probe laser beam monitors the 5S 1/2 → 5P 3/2 transition while another cw laser couples the 5P 3/2 state to a higher excited state. The ratio of the observed Rabi frequencies for coupling to the 5P 3/2 → 8D 3/2,5/2 transitions agrees well with that predicted by use of the transition oscillator strengths. Optical switching is demonstrated with an 80-mW coupling laser beam modulated up to 1 MHz.

© 2001 Optical Society of America

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