High-sensitivity optical fiber SPR traditional Chinese medicine active ingredient sensor and manufacturing and using method thereof

• Main Authors: WEI YONG, TANG YIXIONG, LIU CHUNLAN, REN PUXI, GUO CHAO, SHI CHENGLING, ZHANG YONGHUI
• Format: Patent
• Language: Chinese; English
• Published: 09.02.2024
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; TESTING

The invention belongs to the field of optical fiber sensing, and particularly relates to a high-sensitivity optical fiber SPR traditional Chinese medicine active ingredient sensor and a manufacturing and using method thereof. Comprising a core-shift light injection area, a mode modulation and compression area and a thick-core light receiving area which are sequentially welded, the mode modulation and compression area is of a graded-index optical fiber groove type, a core-shift optical fiber tapering spiral type and a core-shift optical fiber flat-bottom ball type, and a gold film and targeting protein are arranged on the mode modulation and compression area from inside to outside. An optical signal is emitted into the mode compression and modulation area from the core shift light injection area, after modulation, the optical signal mode is concentrated, the light incidence angle is effectively modulated, the sensitivity of the sensor is greatly improved, transmission light makes contact with a gold film to ge