Observation of quantum frequency conversion

Jianming Huang*, Prem Kumar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

239 Scopus citations


Quantum frequency conversion, a process with which an input beam of light can be converted into an output beam of a different frequency while preserving the quantum state, is experimentally demonstrated for the first time. Nonclassical intensity correlation (dB) between two beams at 1064 nm is used as the input quantum property. When the frequency of one of the beams is converted from 1064 to 532 nm, nonclassical intensity correlations (1.5 dB) appear between the up-converted beam and the remaining beam. Our measurements are in excellent agreement with the quantum theory of frequency conversion. The development of tunable sources of novel quantum light states seems possible.

Original languageEnglish (US)
Pages (from-to)2153-2156
Number of pages4
JournalPhysical review letters
Issue number14
StatePublished - 1992

ASJC Scopus subject areas

  • General Physics and Astronomy


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