论文标题
在干涉测量值基于小倾斜测量中实现较高精度
Realization of higher Precision in Interferometric-weak-value-based Small-tilt Measurement
论文作者
论文摘要
我们通过使用弱级光学模式的SAGNAC干涉仪和平衡的同伴检测（BHD），以及弱值扩增（WVA）技术，在实验中实现了小型倾斜度测量值的精确精度增强。与分裂检测（SD）相比，可以通过使用BHD获得较小的最小可测量倾斜（MMT）和较高的信噪比（SNR）。在我们目前的实验条件下，可以获得3.8 NRAD的精度。结果表明，结合WVA技术和BHD可以增强彼此的优势，并且对于某些特殊的应用方案，例如极弱的输出，更广泛的测量带宽等，可以表现得更好。此外，通过实验参数优化，可以进一步提高精度。
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.
