Super-sensitivity interferometric quantum lidar with squeezed-vacuum injection

Zhang Jiandong; Zhang Zijing; Zhao Yuan; Wang Feng; Su Jianzhong

doi:10.3788/IRLA201746.0730002

Interferometric lidar is a device to achieve high precision distance detection by phase estimation. The phase sensitivity of the traditional interferometric lidar is limited by the standard quantum limit, this affecting the precision of ranging. In order to further break the limit and improve the system precision, a scheme of super-sensitivity interferometric quantum lidar with squeezed-vacuum injection was put forward, thus phase sensitivity breaking through the standard quantum limit. And the phase sensitivity of the system was derived with Z detection, intensity difference detection and parity detection method. Then, the ascension of performance was compared and analyzed by simulation calculation. Finally, on the basis of best detection method-parity detection, a phase sensitivity model with transmission loss was establised, and the maximum transmission loss allowed by super-sensitivity was discussed.

Super-sensitivity interferometric quantum lidar with squeezed-vacuum injection

1. Department of Physics,Harbin Institute of Technology,Harbin 150001,China;

2. Tianjin Jinhang Institute of Technical Physics,Tianjin 300308,China

Received Date: 2016-11-05

Rev Recd Date: 2016-12-03

Publish Date: 2017-07-25

Key words:

Abstract: Interferometric lidar is a device to achieve high precision distance detection by phase estimation. The phase sensitivity of the traditional interferometric lidar is limited by the standard quantum limit, this affecting the precision of ranging. In order to further break the limit and improve the system precision, a scheme of super-sensitivity interferometric quantum lidar with squeezed-vacuum injection was put forward, thus phase sensitivity breaking through the standard quantum limit. And the phase sensitivity of the system was derived with Z detection, intensity difference detection and parity detection method. Then, the ascension of performance was compared and analyzed by simulation calculation. Finally, on the basis of best detection method-parity detection, a phase sensitivity model with transmission loss was establised, and the maximum transmission loss allowed by super-sensitivity was discussed.

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Reference (17)

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Super-sensitivity interferometric quantum lidar with squeezed-vacuum injection

doi: 10.3788/IRLA201746.0730002

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