State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing, China.
Opt Lett. 2013 Jun 15;38(12):2140-3. doi: 10.1364/OL.38.002140.
A synthetic-wavelength interferometry of optical frequency combs is proposed for the pulse-to-pulse alignment in absolute distance measurement. The synthetic wavelength derived from the virtual second harmonic and the real second harmonic is used to bridge the interference intensity peak-finding method and the heterodyne interferometric phase measurement, so that the pulse-to-pulse alignment can be linked directly to single-wavelength heterodyne interferometry. The experimental results demonstrate that the distance measured by the peak-finding method with micrometer accuracy can be improved to the nanometer level by applying the method proposed.
提出了一种基于光频梳的合成波长干涉测量技术，用于实现绝对距离测量中的脉冲到脉冲对准。从虚拟二次谐波和真实二次谐波中导出的合成波长用于桥接干涉强度峰值查找方法和外差干涉相位测量，从而可以将脉冲到脉冲对准直接与单波长外差干涉测量联系起来。实验结果表明，通过应用所提出的方法，可以将峰值查找方法以微米精度测量的距离提高到纳米级。
