Pulsed twin beams of light

Orhan Ayẗr*, Prem Kumar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

166 Scopus citations


Pulsed twin beams of light have been generated using an optical-parametric amplifier that is pumped by the second harmonic of a mode-locked and Q-switched neodymium:yttrium aluminum garnet laser. The intensity noise levels on the direct-detected signal and idler beams are found to be correlated by more than 15 dB, and the subtracted noise falls below the quantum limit by more than 6 dB (75%). To our knowledge, this is the first observation of pulsed twin beams of light, and yields the highest quantum-noise reduction observed in any experiment to date. Our measurements are in excellent agreement with the quantum theory of a nondegenerate optical-parametric amplifier.

Original languageEnglish (US)
Pages (from-to)1551-1554
Number of pages4
JournalPhysical review letters
Issue number13
StatePublished - 1990

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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