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SCIENCE CHINA Physics, Mechanics & Astronomy, Volume 60 , Issue 5 : 050321(2017) https://doi.org/10.1007/s11433-017-9021-7

Characterization of squeezed states with controllable coherent light injection at sidebands

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  • ReceivedFeb 6, 2017
  • AcceptedMar 14, 2017
  • PublishedMar 23, 2017

Abstract

There is no abstract available for this article.


Acknowledgment

This work was supported by the National Natural Science Foundation of China (NSFC) (Grant Nos. 11234008, 11361161002, 61571276, and 11654002), Natural Science Foundation of Shanxi Province (Grant No. 2015011007), and Shanxi Scholarship Council of China (Grant No. 2015-002).


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  • Figure 1

    (Color online) (a) The experimental setup. AOM1-3: acoustic optical modulator; PM: single-mode polarization-maintaining optical fiber; HW1-8: half-wave plate; DBS1-2: dichroic beam splitter; PBS1-2: polarization beam splitter; BS1-2: 50/50 beam splitter; PPKTP: periodically poled potassium titanyl phosphate; OPO: optical parametric oscillator; M: mixer; SA: spectrum analyzer; OSC: oscilloscope; (b) schematic diagram of the detection scheme.

  • Figure 2

    (Color online) The noise traces of the quantum states at the analysis frequency $\Omega_{0}=5$ MHz when the single sideband field is injected into the OPO. (a) and (e) are injected sideband fields described in sideband picture; (b)-(d) are the results of the coherent state, amplitude-squeezed state and phase-squeezed state when the sideband field $\hat{a}^{\rm in}_{s1}(\omega_{0}-\Omega_{0})$ is used; (f)-(h) show the results of the upper sideband field injection ($\hat{a}^{\rm in}_{s2}(\omega_{0}+\Omega_{0}+\Delta\Omega)$).

  • Figure 3

    (Color online) The noise traces of the states at the analysis frequency $\Omega_{0}=5$ MHz when double sidebands are injected into the OPO. (a) and (e) are injected sideband fields described in sideband picture; (b)-(d) show the results for the coherent state, amplitude-squeezed state and phase-squeezed state when the frequency shift of AOM2 and AOM3 are 105 and 115 MHz; (f)-(h) show the corresponding results when the frequency shift of AOM2 and AOM3 are 105 and 115.0001 MHz respectively.

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