High-Sensitivity Temperature Sensor Based on Microsphere Cavity in Super Larger Thermo-Optic Coefficient Germanium-core Fiber
A high-sensitivity temperature sensor based on an in-fiber germanium (Ge) microsphere Fabry-Perot (FP) cavity is presented. The lower melting point of the Ge core compared to that of a silica-based fiber is utilized to fabricate the microsphere at the fiber end as a FP cavity by splicing a Ge-core b...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8933455/ |
| _version_ | 1819276637630365696 |
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| author | Zhiyang Wu Shuang Wang Junfeng Jiang Kun Liu Tiegen Liu |
| author_facet | Zhiyang Wu Shuang Wang Junfeng Jiang Kun Liu Tiegen Liu |
| author_sort | Zhiyang Wu |
| collection | DOAJ |
| description | A high-sensitivity temperature sensor based on an in-fiber germanium (Ge) microsphere Fabry-Perot (FP) cavity is presented. The lower melting point of the Ge core compared to that of a silica-based fiber is utilized to fabricate the microsphere at the fiber end as a FP cavity by splicing a Ge-core borosilicate-clad fiber to a single-mode fiber. The Ge-core borosilicate-clad fiber employed is fabricated using a molten core approach with the standard optical fiber draw tower. The large thermo-optic coefficient of semiconductor Ge microsphere cavity gives rise to high temperature sensitivity. Experimental results show that the temperature sensitivity of <sub>~</sub>221 pm/°C can be achieved as the temperature changes from -40°C to +50°C. The proposed sensor also exhibits outstanding stability, with the measurement error and standard deviation within the range ±0.184°C and 0.0049-0.0155°C, respectively. The advantages of high sensitivity, outstanding stability and in-fiber cavity make the proposed sensor a potential candidate for temperature sensing applications. |
| first_indexed | 2024-12-23T23:43:23Z |
| format | Article |
| id | doaj.art-a23a0ffbab67426da1e675402d659fd2 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-23T23:43:23Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-a23a0ffbab67426da1e675402d659fd22022-12-21T17:25:36ZengIEEEIEEE Access2169-35362019-01-01718265818266310.1109/ACCESS.2019.29601788933455High-Sensitivity Temperature Sensor Based on Microsphere Cavity in Super Larger Thermo-Optic Coefficient Germanium-core FiberZhiyang Wu0https://orcid.org/0000-0003-0374-2993Shuang Wang1https://orcid.org/0000-0002-9809-4062Junfeng Jiang2https://orcid.org/0000-0003-0393-8451Kun Liu3https://orcid.org/0000-0003-2460-6851Tiegen Liu4https://orcid.org/0000-0002-5691-7358School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, ChinaSchool of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, ChinaSchool of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, ChinaSchool of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, ChinaSchool of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, ChinaA high-sensitivity temperature sensor based on an in-fiber germanium (Ge) microsphere Fabry-Perot (FP) cavity is presented. The lower melting point of the Ge core compared to that of a silica-based fiber is utilized to fabricate the microsphere at the fiber end as a FP cavity by splicing a Ge-core borosilicate-clad fiber to a single-mode fiber. The Ge-core borosilicate-clad fiber employed is fabricated using a molten core approach with the standard optical fiber draw tower. The large thermo-optic coefficient of semiconductor Ge microsphere cavity gives rise to high temperature sensitivity. Experimental results show that the temperature sensitivity of <sub>~</sub>221 pm/°C can be achieved as the temperature changes from -40°C to +50°C. The proposed sensor also exhibits outstanding stability, with the measurement error and standard deviation within the range ±0.184°C and 0.0049-0.0155°C, respectively. The advantages of high sensitivity, outstanding stability and in-fiber cavity make the proposed sensor a potential candidate for temperature sensing applications.https://ieeexplore.ieee.org/document/8933455/Fabry–Perot (FP)high sensitivityGe-core borosilicate-clad fiberin-fiberthermo-optic coefficient |
| spellingShingle | Zhiyang Wu Shuang Wang Junfeng Jiang Kun Liu Tiegen Liu High-Sensitivity Temperature Sensor Based on Microsphere Cavity in Super Larger Thermo-Optic Coefficient Germanium-core Fiber IEEE Access Fabry–Perot (FP) high sensitivity Ge-core borosilicate-clad fiber in-fiber thermo-optic coefficient |
| title | High-Sensitivity Temperature Sensor Based on Microsphere Cavity in Super Larger Thermo-Optic Coefficient Germanium-core Fiber |
| title_full | High-Sensitivity Temperature Sensor Based on Microsphere Cavity in Super Larger Thermo-Optic Coefficient Germanium-core Fiber |
| title_fullStr | High-Sensitivity Temperature Sensor Based on Microsphere Cavity in Super Larger Thermo-Optic Coefficient Germanium-core Fiber |
| title_full_unstemmed | High-Sensitivity Temperature Sensor Based on Microsphere Cavity in Super Larger Thermo-Optic Coefficient Germanium-core Fiber |
| title_short | High-Sensitivity Temperature Sensor Based on Microsphere Cavity in Super Larger Thermo-Optic Coefficient Germanium-core Fiber |
| title_sort | high sensitivity temperature sensor based on microsphere cavity in super larger thermo optic coefficient germanium core fiber |
| topic | Fabry–Perot (FP) high sensitivity Ge-core borosilicate-clad fiber in-fiber thermo-optic coefficient |
| url | https://ieeexplore.ieee.org/document/8933455/ |
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