Absolute sensitivity of phase measurement in an SU(1,1) type interferometer

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • D. U. Wei
  • J. I.A. Jun
  • J. F. Chen
  • Z. Y. Ou
  • Weiping Zhang

Detail(s)

Original languageEnglish
Pages (from-to)1051-1054
Journal / PublicationOptics Letters
Volume43
Issue number5
Publication statusPublished - 1 Mar 2018
Externally publishedYes

Abstract

Absolute sensitivity is measured for the phase measurement in an SU(1,1) type interferometer, and the results are compared to that of a Mach–Zehnder interferometer operated under the condition of the same intra-interferometer intensity. The interferometer is phase locked to a point with the largest quantum noise cancellation, and a simulated phase modulation is added in one arm of the SU(1,1) interferometer. Both the signal and noise level are estimated at the same frequency range, and we obtained 3 dB improvement in sensitivity for the SU(1,1) interferometer over the Mach–Zehnder interferometer. Our results demonstrate a direct phase estimation and may pave the way for practical applications of a nonlinear interferometer.

Bibliographic Note

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Citation Format(s)

Absolute sensitivity of phase measurement in an SU(1,1) type interferometer. / Wei, D. U.; Jun, J. I.A.; Chen, J. F. et al.
In: Optics Letters, Vol. 43, No. 5, 01.03.2018, p. 1051-1054.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review