Interference fringes in a nonlinear Michelson interferometer based on spontaneous parametric down-conversion

• URL: http://arxiv.org/abs/2109.07668v2
• Date: Fri, 17 Sep 2021 01:35:00 GMT
• Title: Interference fringes in a nonlinear Michelson interferometer based on spontaneous parametric down-conversion
• Authors: Chen Yang, Zhi-Yuan Zhou, Liu-Long Wang, Yan Li, Shi-Kai Liu, Zheng Ge, Xiao-Chun Zhang, Qing Tang, Guang-Can Guo, and Bao-Sen Shi
• Abstract summary: Quantum nonlinear interferometers (QNIs) can measure the infrared physical quantities of a sample by detecting visible photons. A QNI with Michelson geometry based on the spontaneous parametric down-conversion in a second-order nonlinear crystal is studied systematically.
• Score: 5.0903384958409585
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum nonlinear interferometers (QNIs) can measure the infrared physical quantities of a sample by detecting visible photons. A QNI with Michelson geometry based on the spontaneous parametric down-conversion in a second-order nonlinear crystal is studied systematically. A simplified theoretical model of the QNI is presented. The interference visibility, coherence length, equal-inclination interference, and equal-thickness interference for the QNI are demonstrated theoretically and experimentally. As an application example of the QNI, the refractive index and the angle between two surfaces of a BBO crystal are measured using equal-inclination interference and equal-thickness interference.

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