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Yao CK, Peng CH, Chen HM, Hsu WY, Lin TC, Manie YC, Peng PC. One Raman DTS Interrogator Channel Supports a Dual Separate Path to Realize Spatial Duplexing. SENSORS (BASEL, SWITZERLAND) 2024; 24:5277. [PMID: 39204971 PMCID: PMC11360438 DOI: 10.3390/s24165277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Revised: 08/09/2024] [Accepted: 08/13/2024] [Indexed: 09/04/2024]
Abstract
Deploying distributed fiber-optic sensor (DFOS) technology to gather environmental parameters over expansive areas is an essential monitoring strategy in the context of comprehensive searches for anomalous places. This study utilizes a single temperature measurement channel within a commercial Raman-based distributed temperature sensing (RDTS) interrogator and divides it into two separate, uncorrelated paths to enable spatial duplex temperature measurements. The distinction between temperature events corresponding to each path in the dual separate path (DSP) in RDTS can be achieved when temperature events are concurrently occurring in the DSP. Additionally, the RDTS-DSP solution may integrate free space optics (FSO) into its fiber path, which serves to enhance the user-friendliness, scalability, and cost-effectiveness of DFOS technology. An RDTS measurement channel can effectively function as a DSP, thus doubling the RDTS measurement pathway, and can be combined with FSO to significantly improve RDTS performance.
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Affiliation(s)
- Cheng-Kai Yao
- Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan; (C.-K.Y.); (C.-H.P.); (Y.C.M.)
| | - Chun-Hsiang Peng
- Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan; (C.-K.Y.); (C.-H.P.); (Y.C.M.)
| | - Hung-Ming Chen
- Marine Geology and Energy Department, Industrial Technology Research Institute, Tainan 71101, Taiwan; (H.-M.C.); (W.-Y.H.)
| | - Wen-Yang Hsu
- Marine Geology and Energy Department, Industrial Technology Research Institute, Tainan 71101, Taiwan; (H.-M.C.); (W.-Y.H.)
| | - Tzu-Chiao Lin
- Department of Electrical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan;
| | - Yibeltal Chanie Manie
- Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan; (C.-K.Y.); (C.-H.P.); (Y.C.M.)
| | - Peng-Chun Peng
- Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan; (C.-K.Y.); (C.-H.P.); (Y.C.M.)
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Xu R, Ke C, Xue Y, Xu Y, Xue M, Ye J, Liu H, Chen M, Qu S, Yuan L. Simultaneous Measurement of Refractive Index and Temperature Based on SMF-HCF-FCF-HCF-SMF Fiber Structure. SENSORS (BASEL, SWITZERLAND) 2022; 22:8897. [PMID: 36433491 PMCID: PMC9692980 DOI: 10.3390/s22228897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/10/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
In this research, we proposed and experimentally verified a compact all-fiber sensor that can measure refractive index (RI) and temperature simultaneously. Two segments of hollow-core fiber (HCF) are connected to the two ends of the four-core fiber (FCF) as a beam splitter and a coupler, and then spliced with two sections of single-mode fibers (lead-in and lead-out SMF), respectively. The two hollow-core fibers can excite the higher-order modes of the four-core fiber and recouple the core modes and higher-order modes into the outgoing single-mode fiber, thereby forming inter-mode interference. The different response sensitivities of two interference dips to RI and temperature manifest that the proposed structure can achieve simultaneous measurement. From the experimental results, it can be seen that the maximum sensitivity of the sensor to RI and temperature is 275.30 nm/RIU and 94.4 pm/°C, respectively. When the wavelength resolution is 0.02 nm, the RI and temperature resolutions of the sensor are 7.74 × 10-5 RIU and 0.335 °C. The proposed dual-parameter optical sensor has the advantages of high sensitivities, good repeatability, simple fabrication, and structure. In addition, it has potential application value in multi-parameter simultaneous measurement.
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Affiliation(s)
- Ronghui Xu
- Photonics Research Center, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronics Technology, Guilin 541004, China
| | - Chengran Ke
- Photonics Research Center, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronics Technology, Guilin 541004, China
| | - Yipu Xue
- Photonics Research Center, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronics Technology, Guilin 541004, China
| | - Yifei Xu
- Photonics Research Center, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronics Technology, Guilin 541004, China
| | - Minmin Xue
- Photonics Research Center, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronics Technology, Guilin 541004, China
| | - Jingfu Ye
- Photonics Research Center, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronics Technology, Guilin 541004, China
| | - Houquan Liu
- Photonics Research Center, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronics Technology, Guilin 541004, China
| | - Ming Chen
- Photonics Research Center, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronics Technology, Guilin 541004, China
| | - Shiliang Qu
- Photonics Research Center, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronics Technology, Guilin 541004, China
| | - Libo Yuan
- Photonics Research Center, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronics Technology, Guilin 541004, China
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