Frequency metrology via quantum interference in two-photon excitation
Quantum interference in atomic two-photon excitation is exploited for optical demodulation, with phase-sensitive detection at ±12 THz having been achieved. By utilizing the atoms as ultrafast nonlinear mixing elements, a new technique for the comparison of essentially arbitrary frequencies over the range 200-2000 nm is presented.
© 1996 IEEE. This work is supported by the Division of Chemical Sciences, Office of Basic Energy Sciences, Office of Energy Research, U.S. Department of Energy.
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