Envelope peak-adaptive resolution enhancement of interference fringes using a nonlinear frequency-to-time mapping
Envelope peak-adaptive resolution enhancement of interference fringes using a nonlinear frequency-to-time mapping
复制标题
使用非线性频率到时间映射的干涉条纹包络峰值自适应分辨率增强
DOI：
10.1016/j.optcom.2020.125870
复制
发表时间：
2020
影响因子：
2.4
通讯作者：
Aketagawa Masato
中科院分区：
文献类型：
--
作者：
Wei Dong;Nagata Yusuke;Aketagawa Masato
本文提出了一种提高干涉图包络峰值分辨率的新算法。在多脉冲串干涉仪中，确定干涉条纹包络的峰值位置是确定参考镜位置的关键。通常使用离散傅里叶变换（DFT）来重构干涉图案包络。然而，所提出的算法而是基于扭曲离散傅里叶变换（WDFT），与DFT不同，WDFT在整个包络上不具有统一的位置分辨率。所提出的基于WDFT的过程被发现是适合于选择性地提高周围的包络峰位置的位置分辨率。光学实验证明了该方法的可靠性。
This paper presents a novel algorithm for enhancing the envelope peak-adaptive resolution of interference patterns. In multi-pulse-train interferometers, determining the peak position of the envelope of interference fringes is essential for finding the position of reference mirrors. An interference pattern envelope is generally reconstructed using the discrete Fourier transform (DFT). However, the proposed algorithm is based instead on a warped discrete Fourier transform (WDFT), which, unlike DFT, does not have a uniform position resolution over the entire envelope. The proposed WDFT-based procedure is found to be suitable for selectively enhancing the position resolution around the envelope peak position. The reliability of the proposed approach is demonstrated by optical experiments.