Photon-noise reduction experiments with a Q-switched Nd:YAG laser

Prem Kumar*, Jianming Huang, Orhan Aytuer

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


We demonstrate the use of a commercial mode-locked and Q-switched Nd:YAG laser in photon-noise reduction experiments. There are many frequency bands wherein the photodetection of such a laser is shot-noise limited. By appropriately filtering the photocurrent produced in direct detection of light from an optical parameteric amplifier that is pumped with this laser, we have successfully generated twin-beam states of light. We demonstrate that such twin beams can be used to make measurements below the shot-noise limit.

Original languageEnglish (US)
Pages (from-to)192-197
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Jan 1 1991
EventLaser Noise - Boston, MA, USA
Duration: Nov 5 1990Nov 6 1990

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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