Experimental demonstration of coherent feedback control on optical field squeezing

Sanae Iida, Mitsuyoshi Yukawa, Hidehiro Yonezawa, Naoki Yamamoto, Akira Furusawa

Research output: Contribution to journalArticlepeer-review

91 Citations (Scopus)


Coherent feedback is a non-measurement based, hence a back-action free, method of control for quantum systems. A typical application of this control scheme is squeezing enhancement, a purely non-classical effect in quantum optics. In this technical note we report its first experimental demonstration that well agrees with the theory taking into account time delays and losses in the coherent feedback loop. The results clarify both the benefit and the limitation of coherent feedback control in a practical situation.

Original languageEnglish
Article number6189053
Pages (from-to)2045-2050
Number of pages6
JournalIEEE Transactions on Automatic Control
Issue number8
Publication statusPublished - 2012


  • Coherent feedback control
  • quantum optics
  • squeezing

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering


Dive into the research topics of 'Experimental demonstration of coherent feedback control on optical field squeezing'. Together they form a unique fingerprint.

Cite this