A fluoride fiber optics in-line sensor for mid-IR spectroscopy based on a hetero-core structure

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K14752
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 21030:Measurement engineering-related
• Research Institution: Akita Prefectural University
• Principal Investigator: Goya Kenji 秋田県立大学, システム科学技術学部, 助教 (40757332)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: フッ化物ファイバ / 赤外吸収分光 / エバネッセント波 / 赤外光源

Outline of Final Research Achievements

We report a side-polished sensor structure for mid-infrared (IR) fiber evanescent wave spectroscopy, produced by means of a mechanical polishing process instead of a hetero-core structure. By integrating a mid-IR light source into this sensor system, spectroscopic analyses could be performed over the range from 2515 to 3735 nm. Two types of sensor structures were fabricated to examine their characteristics and performance. Spectroscopic analyses of liquid and gas samples were successfully performed using one of the fiber sensors.

Free Research Field

計測工学

Academic Significance and Societal Importance of the Research Achievements

フッ化物ファイバを用いた中赤外領域の計測システムとしては、世界初の実証報告であり、計測システムの最適化及び継続的な実験を行うことで、さらなる高度化が可能である。特に赤外分光計測において、高感度化と即時応答性を両立させることで実用的な計測システムへと昇華させたい。