Reducing optical interference in interferometric sensing systems

• Main Authors: LI GENQIAN, TAN HONG, CAO ERHUA, YAO JIANBO
• Format: Patent
• Language: Chinese; English
• Published: 27.10.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention introduces a method for preventing (i.e., reducing or eliminating) high-frequency interference fringes caused by uneven optical coupling surfaces between an optical waveguide and a probe in an interference detection system. This method can reduce high-frequency interference fringes occurring when an optical waveguide, such as an optical fiber, is directly coupled with a probe. Specifically, the coupling surface of the optical waveguide can be processed through methods such as abrasive paper, sand blasting or acid etching to form a vaporific surface. In use, the vaporous surface scatters into and out of the optical fiber of the optical waveguide to prevent the formation of high-frequency interference fringes. 本发明介绍一种在干涉检测系统中防止(即减少或消除)由光波导和探针之间的不平整的光学耦合面引起的高频干涉条纹。这个方法可以降低当光波导，如光纤，与探针直接耦合时发生的高频干涉条纹。具体来说，光波导的耦合面可以通过砂纸、喷砂或酸蚀等方法进行处理，以形成雾状表面。在使用中，雾状表面散射出入光波导的光纤，防止高频干涉条纹的形成。