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Li C, Liu S, Zhong J, Zou T, Yan W, Lin Q, Xiao Y, Wang Y. Optimized helical intermedium-period fiber grating for breathing monitoring. OPTICS EXPRESS 2024; 32:1207-1217. [PMID: 38297677 DOI: 10.1364/oe.506338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 11/22/2023] [Indexed: 02/02/2024]
Abstract
The investigation into the spectral properties and refractive index (RI) sensitivities at low RI region of helical intermedium-period fiber gratings (HIPFGs) with varied periods ranging from 10-48 μm is presented in detail for the first time. The structure of HIPFG is optimized for RI sensing in the RI range of 1.3-1.33 by comparing the optical properties of HIPFGs with different grating periods. The HIPFG with optimized structure is demonstrated to have a high average sensitivity of 302.5 nm/RIU in the RI ranging from 1.3 to 1.33, which is two orders more elevated than the traditional long-period fiber gratings. The improved HIPFG is also experimentally applied to breath monitoring in different states. Normal breath, slow breath, fast breath, and unhealthy breath are distinguished based on breathing rate, intensity, and time of exhalation and inhalation. The fastest response time is determined to be 10 ms. The results demonstrate that the optical fiber's sensitivity in the low RI region can be increased by shortening its period, offering a special strategy for improving detection performance of HIPFGs. By verifying its performance in breathing monitoring, it is proved that the optimized HIPFG sensor has the great potential to expand medical applications.
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Chen X, Xiao L, Li X, Yi D, Zhang J, Yuan H, Ning Z, Hong X, Chen Y. Tapered Fiber Bioprobe Based on U-Shaped Fiber Transmission for Immunoassay. BIOSENSORS 2023; 13:940. [PMID: 37887133 PMCID: PMC10605819 DOI: 10.3390/bios13100940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/14/2023] [Accepted: 10/16/2023] [Indexed: 10/28/2023]
Abstract
In this paper, a tapered fiber bioprobe based on Mach-Zehnder interference (MZI) is proposed. To retain the highly sensitive straight-tapered fiber MZI sensing structure, we designed a U-shaped transmission fiber structure for the collection of optical sensing signals to achieve a miniature-insert-probe design. The spectrum responses from the conventional straight-tapered fiber MZI sensor and our proposed sensor were compared and analyzed, and experimental results showed that our proposed sensor not only has the same sensing capability as the straight-tapered fiber sensor, but also has the advantages of being flexible, convenient, and less liquid-consuming, which are attributed to the inserted probe design. The tapered fiber bioprobe obtained a sensitivity of 1611.27 nm/RIU in the refractive index detection range of 1.3326-1.3414. Finally, immunoassays for different concentrations of human immunoglobulin G were achieved with the tapered fiber bioprobe through surface functionalization, and the detection limit was 45 ng/mL. Our tapered fiber bioprobe has the insert-probe advantages of simpleness, convenience, and fast operation. Simultaneously, it is low-cost, highly sensitive, and has a low detection limit, which means it has potential applications in immunoassays and early medical diagnosis.
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Affiliation(s)
- Xinghong Chen
- School of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (X.C.); (L.X.); (X.L.); (D.Y.); (J.Z.); (H.Y.); (Z.N.); (X.H.)
- Shenzhen Engineering Laboratory for Optical Fiber Sensors and Networks, Shenzhen 518060, China
- Shenzhen Key Laboratory of Sensor Technology, Shenzhen 518060, China
| | - Lei Xiao
- School of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (X.C.); (L.X.); (X.L.); (D.Y.); (J.Z.); (H.Y.); (Z.N.); (X.H.)
- Shenzhen Engineering Laboratory for Optical Fiber Sensors and Networks, Shenzhen 518060, China
- Shenzhen Tian’an Zhiyuan Sensor Technology Co., Ltd., Shenzhen 518060, China
| | - Xuejin Li
- School of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (X.C.); (L.X.); (X.L.); (D.Y.); (J.Z.); (H.Y.); (Z.N.); (X.H.)
- Shenzhen Engineering Laboratory for Optical Fiber Sensors and Networks, Shenzhen 518060, China
- Shenzhen Key Laboratory of Sensor Technology, Shenzhen 518060, China
- School of Science, The Chinese University of Hong Kong, Shenzhen 518172, China
| | - Duo Yi
- School of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (X.C.); (L.X.); (X.L.); (D.Y.); (J.Z.); (H.Y.); (Z.N.); (X.H.)
- Shenzhen Engineering Laboratory for Optical Fiber Sensors and Networks, Shenzhen 518060, China
- Shenzhen Key Laboratory of Sensor Technology, Shenzhen 518060, China
| | - Jinghan Zhang
- School of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (X.C.); (L.X.); (X.L.); (D.Y.); (J.Z.); (H.Y.); (Z.N.); (X.H.)
- Shenzhen Engineering Laboratory for Optical Fiber Sensors and Networks, Shenzhen 518060, China
- Shenzhen Key Laboratory of Sensor Technology, Shenzhen 518060, China
- School of Science, The Chinese University of Hong Kong, Shenzhen 518172, China
| | - Hao Yuan
- School of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (X.C.); (L.X.); (X.L.); (D.Y.); (J.Z.); (H.Y.); (Z.N.); (X.H.)
- Shenzhen Engineering Laboratory for Optical Fiber Sensors and Networks, Shenzhen 518060, China
- Shenzhen Key Laboratory of Sensor Technology, Shenzhen 518060, China
| | - Zhiyao Ning
- School of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (X.C.); (L.X.); (X.L.); (D.Y.); (J.Z.); (H.Y.); (Z.N.); (X.H.)
- Shenzhen Engineering Laboratory for Optical Fiber Sensors and Networks, Shenzhen 518060, China
- Shenzhen Key Laboratory of Sensor Technology, Shenzhen 518060, China
| | - Xueming Hong
- School of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (X.C.); (L.X.); (X.L.); (D.Y.); (J.Z.); (H.Y.); (Z.N.); (X.H.)
- Shenzhen Engineering Laboratory for Optical Fiber Sensors and Networks, Shenzhen 518060, China
- Shenzhen Key Laboratory of Sensor Technology, Shenzhen 518060, China
| | - Yuzhi Chen
- School of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (X.C.); (L.X.); (X.L.); (D.Y.); (J.Z.); (H.Y.); (Z.N.); (X.H.)
- Shenzhen Engineering Laboratory for Optical Fiber Sensors and Networks, Shenzhen 518060, China
- Shenzhen Key Laboratory of Sensor Technology, Shenzhen 518060, China
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Zhong J, Liu S, Zou T, Yan W, Chen P, Liu B, Sun Z, Wang Y. High-Sensitivity Optical Fiber-Based Glucose Sensor Using Helical Intermediate-Period Fiber Grating. SENSORS (BASEL, SWITZERLAND) 2022; 22:6824. [PMID: 36146172 PMCID: PMC9501600 DOI: 10.3390/s22186824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/05/2022] [Accepted: 09/06/2022] [Indexed: 06/16/2023]
Abstract
An all-fiber glucose sensor is proposed and demonstrated based on a helical intermediate-period fiber grating (HIPFG) produced by using a hydrogen/oxygen flame heating method. The HIPFG, with a grating length of 1.7 cm and a period of 35 μm, presents four sets of double dips with low insertion losses and strong coupling strengths in the transmission spectrum. The HIPFG possesses an averaged refractive index (RI) sensitivity of 213.6 nm/RIU nm/RIU in the RI range of 1.33-1.36 and a highest RI sensitivity of 472 nm/RIU at RI of 1.395. In addition, the HIPFG is demonstrated with a low-temperature sensitivity of 3.67 pm/°C, which promises a self-temperature compensation in glucose detection. In the glucose-sensing test, the HIPFG sensor manifests a detection sensitivity of 0.026 nm/(mg/mL) and a limit of detection (LOD) of 1 mg/mL. Moreover, the HIPFG sensor exhibits good stability in 2 h, indicating its capacity for long-time detection. The properties of easy fabrication, high flexibility, insensitivity to temperature, and good stability of the proposed HIPFG endow it with a promising potential for long-term and compact biosensors.
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Affiliation(s)
- Junlan Zhong
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Shen Liu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Tao Zou
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Wenqi Yan
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Peijing Chen
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Bonan Liu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Zhongyuan Sun
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Yiping Wang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
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