The phase errors, resulting from the multi beam interference in the Fabry Perot cavities of the wavelength scanning fiber optic interferometer for absolute distance measurement, are analyzed.

• 分析了可用于绝对距离测量的波长扫描法布里-珀罗干涉仪腔内多光束干涉对输出信号的影响，及由此产生的相位测量误差。