An experimental scheme is proposed by which the quantum states of two light beams of different frequencies can be interchanged. With this scheme it is possible to generate frequency-tunable squeezed light for spectroscopic applications.
© 1990 Optical Society of America
Original Manuscript: July 11, 1990
Manuscript Accepted: October 2, 1990
Published: December 15, 1990
Prem Kumar, "Quantum frequency conversion," Opt. Lett. 15, 1476-1478 (1990)