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Abstract After a long-term research, the birefringence-Zeeman dual-frequency (BZDF) laser has entered the practical stage, and the BZDF laser interferometer has more powerful displacement and size measurement functions, especially the… Click to show full abstract
Abstract After a long-term research, the birefringence-Zeeman dual-frequency (BZDF) laser has entered the practical stage, and the BZDF laser interferometer has more powerful displacement and size measurement functions, especially the near-zero nonlinearity. This paper theoretically analyzes the mechanism of the near-zero nonlinear error, including theoretical simulation and experimental measurements. The measurement results show that the nonlinear error of the BZDF laser interferometer is only 0.3 nm, which is one order of magnitude smaller than that of traditional Zeeman dual-frequency (ZDF) laser interferometer. It has broad application prospects in the field of ultra-precision metrology.
Journal Title: Optics Communications
Year Published: 2019
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