Generation of intensity difference squeezed state at a wavelength of 1.34 μm

Meiru Huo; Jiliang Qin; Yingrong Sun; Zhihui Yan; Xiaojun Jia

doi:10.3788/COL201816.052701

Journals >Chinese Optics Letters >Volume 16 >Issue 5 >Page 052701 > Article

Chinese Optics Letters
Vol. 16, Issue 5, 052701 (2018)

Generation of intensity difference squeezed state at a wavelength of 1.34 μm

Meiru Huo¹, Jiliang Qin¹, Yingrong Sun¹, Zhihui Yan^1、2, and Xiaojun Jia^1、2、*

Author Affiliations

¹State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China

²Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

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DOI: 10.3788/COL201816.052701 Cite this Article Set citation alerts

Meiru Huo, Jiliang Qin, Yingrong Sun, Zhihui Yan, Xiaojun Jia. Generation of intensity difference squeezed state at a wavelength of 1.34 μm[J]. Chinese Optics Letters, 2018, 16(5): 052701 Copy Citation Text

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Abstract

The intensity difference squeezed state, which means that the fluctuation of the intensity difference between signal and idler beams is less than that of the corresponding shot noise level (SNL), plays an important role in high sensitivity measurement, quantum imaging, and quantum random numbers generation. When an optical parametric oscillator consisting of a type-II phase-matching periodically poled

{KTiOPO}_{4}

crystal operates above the threshold, an intensity difference squeezed state at a telecommunication wavelength can be obtained. The squeezing of

7.7 \pm 0.5 dB

below the SNL is achieved in an analysis frequency region of

2.4 - 5.0 MHz

ω_{0} = ω_{1} + ω_{2}, k_{0} = k_{1} + k_{2} + m K_{g},

(1)

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k_{0}^{y} = k_{1}^{z} + k_{2}^{y} + m K_{g}^{I I},

(2)

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S_{IDS} (Ω) = S_{SNL} (1 - \frac{η ξ}{1 + Ω^{2} τ_{C}^{2}}),

(3)

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Meiru Huo, Jiliang Qin, Yingrong Sun, Zhihui Yan, Xiaojun Jia. Generation of intensity difference squeezed state at a wavelength of 1.34 μm[J]. Chinese Optics Letters, 2018, 16(5): 052701

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