Fabrication method of multi-core fiber Bragg grating probe used for measuring structures of a micro part based on the capillary self-assemble technique

US10481325B2 · kind B2 · utility

Assignee

• HARBIN INSTITUTE OF TECHNOLOGY · CN

Inventors

• Jiwen Cui · Jingwei, CN
• Kunpeng Feng · Xing'an, CN
• Hong Dang · Xing'an, CN
• Shiyuan Zhao · Xing'an, CN
• Junying Li · Somerville, US
• Jiubin Tan · Jingwei, CN

Key dates

• Filing date: Mar 2, 2016
• Grant date: Nov 19, 2019
• Expiry date: Sep 4, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B11/00
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A fabrication method of a multi-core fiber Bragg grating (FBG) probe for measuring structures of a micro part based on the capillary self-assembly technique, wherein the diameter of the fiber (6) inscribed with FBG is reduced using a mechanical method or an etch method by the hydrofluoric acid; the fibers (6) inscribed with FBG, whose diameter has been reduced, are inserted into a tube (7) through its terminal with an inner taper angle; the FBG terminals of these fibers (6) are immersed into the UV adhesive (10) of a low viscosity and the UV adhesive (10) is raised in the gaps between the fibers (6); or the UV adhesive is dropped on these fibers (6) and the capillary bridge between the fibers (6) is formed; a most compact structure of the fiber bundle is formed as a result of the capillary self-assembly; the fiber bundle is cured using a UV light and the multi-core FBG (11) is therefore formed; the terminal of the multi-core FBG (11) is polished with an optic fiber polishing machine and then a spherical tip is fabricated with the melting fiber method or the installation method of a micro ball; therefore, a multi-core FBG (11) probe can be achieved. The method features low crosstalk…