Realization of higher Precision in Interferometric-weak-value-based Small-tilt Measurement

• URL: http://arxiv.org/abs/2210.14553v1
• Date: Wed, 26 Oct 2022 08:16:23 GMT
• Title: Realization of higher Precision in Interferometric-weak-value-based Small-tilt Measurement
• Authors: ChaoXia Zhang, YongLang Lai, RongGuo Yang, Kui Liu, Jing Zhang, HengXin Sun, JiangRui Gao
• Abstract summary: We experimentally realize a great precision enhancement in the small tilt measurement by using a Sagnac interferometer and balanced homodyne detection (BHD) of high-order optical modes. Smaller minimum measurable tilt (MMT) and higher signal-to-noise ratio (SNR) can be obtained by using BHD, compared with the split detection (SD)
• Score: 5.105266061680764
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We experimentally realize a great precision enhancement in the small tilt measurement by using a Sagnac interferometer and balanced homodyne detection (BHD) of high-order optical modes, together with the weak value amplification (WVA) technique. Smaller minimum measurable tilt (MMT) and higher signal-to-noise ratio (SNR) can be obtained by using BHD, compared with the split detection (SD). The precision of 3.8 nrad can be obtained under our present experimental condition. It is shown that combining WVA technique and BHD can strengthen each other's advantages and can behave better for some special application scenarios, such as extremely weak output, wider measurement bandwidth, etc. Moreover, the precision can be further enhanced by experimental parameter optimization.

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