Double-frequency grating shearing interferometer with built-in phase-shifting function for robust multi-level phase retrieval

研究成果: 雜誌貢獻期刊論文同行評審

摘要

In this paper, we propose and demonstrate a novel interferometer and signal process to retrieve two-dimensional signals with multilevel phases. The interferometer is based on a shearing interferometry with double-frequency grating, and phase-shifting interferometry is derived as a built-in function of the lateral displacement of the grating. The interferometer not only retrieves the multilevel phase signals but also eliminates slow-varying phase errors wherever they occur. Owing to the common path algorithm, the new interferometer is more robust in dynamic circumstances for optical testing and data processing. We propose a pre-integral signal process for two-dimensional (2D) data processing to prevent post-phase-integral due to shearing interferometry. The simulation and experiment showed that the proposed interferometer with a pre-integral process has various advantages in signal processing for multilevel phase retrieval, and will be useful for higher data rates in optical data storage and free-space communication.

原文???core.languages.en_GB???
文章編號9471
期刊Scientific Reports
12
發行號1
DOIs
出版狀態已出版 - 12月 2022

指紋

深入研究「Double-frequency grating shearing interferometer with built-in phase-shifting function for robust multi-level phase retrieval」主題。共同形成了獨特的指紋。

引用此