High-Sensitivity Salinity and Temperature Sensing in Seawater Based on a Microfiber Directional Coupler
A simple, high-sensitivity, and low-cost optical sensor for the measurement of temperature and salinity in seawater is demonstrated based on a microfiber directional coupler. The shifts of sensing dips are highly sensitive to the change of salinity and temperature in seawater with highest sensitivit...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2016-01-01
|
| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/7524691/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849706843920662528 |
|---|---|
| author | Shanshan Wang Hongjuan Yang Yipeng Liao Xin Wang Jing Wang |
| author_facet | Shanshan Wang Hongjuan Yang Yipeng Liao Xin Wang Jing Wang |
| author_sort | Shanshan Wang |
| collection | DOAJ |
| description | A simple, high-sensitivity, and low-cost optical sensor for the measurement of temperature and salinity in seawater is demonstrated based on a microfiber directional coupler. The shifts of sensing dips are highly sensitive to the change of salinity and temperature in seawater with highest sensitivities at 930 pm/‰ and <inline-formula> <tex-math notation="LaTeX">$-$</tex-math></inline-formula>160 pm/ <inline-formula> <tex-math notation="LaTeX">$^{\circ}$</tex-math></inline-formula>C for coupler assembled by 3.79- and 2.20- <inline-formula> <tex-math notation="LaTeX">$\mu\text{m}$</tex-math></inline-formula>- diameter fibers. The temperature sensitivity can be further improved to <inline-formula> <tex-math notation="LaTeX">$-$</tex-math></inline-formula>1130 pm/ <inline-formula> <tex-math notation="LaTeX">$^{\circ}$</tex-math></inline-formula>C for smaller fibers with diameters of 3.50 and 1.35 <inline-formula> <tex-math notation="LaTeX">$\mu\text{m}$</tex-math></inline-formula>. To keep the stable structure in liquid, a methodology of coating using ethyl cellulose ethoce film is proposed. By ethyl cellulose ethoce solvent coating on the coupling area, the coupler can be operated stably in seawater. The sensor demonstrated here is easy to construct, is low cost, is high sensitivity, and is compatible with the optical fiber system, which may find applications in developing miniature and multifunction optical sensors used in seawater and other liquid surroundings. |
| format | Article |
| id | doaj-art-dff9f95678b94ef48c3eabc43fc87f0d |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-dff9f95678b94ef48c3eabc43fc87f0d2025-08-20T03:16:04ZengIEEEIEEE Photonics Journal1943-06552016-01-01841910.1109/JPHOT.2016.25935867524691High-Sensitivity Salinity and Temperature Sensing in Seawater Based on a Microfiber Directional CouplerShanshan Wang0https://orcid.org/0000-0002-5324-6050Hongjuan Yang1Yipeng Liao2Xin Wang3Jing Wang4Optics and Optoelectronics Laboratory, Department of Physics, Ocean University of China, Qingdao, ChinaOptics and Optoelectronics Laboratory, Department of Physics, Ocean University of China, Qingdao, ChinaOptics and Optoelectronics Laboratory, Department of Physics, Ocean University of China, Qingdao, ChinaOptics and Optoelectronics Laboratory, Department of Physics, Ocean University of China, Qingdao, ChinaOptics and Optoelectronics Laboratory, Department of Physics, Ocean University of China, Qingdao, ChinaA simple, high-sensitivity, and low-cost optical sensor for the measurement of temperature and salinity in seawater is demonstrated based on a microfiber directional coupler. The shifts of sensing dips are highly sensitive to the change of salinity and temperature in seawater with highest sensitivities at 930 pm/‰ and <inline-formula> <tex-math notation="LaTeX">$-$</tex-math></inline-formula>160 pm/ <inline-formula> <tex-math notation="LaTeX">$^{\circ}$</tex-math></inline-formula>C for coupler assembled by 3.79- and 2.20- <inline-formula> <tex-math notation="LaTeX">$\mu\text{m}$</tex-math></inline-formula>- diameter fibers. The temperature sensitivity can be further improved to <inline-formula> <tex-math notation="LaTeX">$-$</tex-math></inline-formula>1130 pm/ <inline-formula> <tex-math notation="LaTeX">$^{\circ}$</tex-math></inline-formula>C for smaller fibers with diameters of 3.50 and 1.35 <inline-formula> <tex-math notation="LaTeX">$\mu\text{m}$</tex-math></inline-formula>. To keep the stable structure in liquid, a methodology of coating using ethyl cellulose ethoce film is proposed. By ethyl cellulose ethoce solvent coating on the coupling area, the coupler can be operated stably in seawater. The sensor demonstrated here is easy to construct, is low cost, is high sensitivity, and is compatible with the optical fiber system, which may find applications in developing miniature and multifunction optical sensors used in seawater and other liquid surroundings.https://ieeexplore.ieee.org/document/7524691/Directional couplersalinity sensingtemperature sensingmicrofiber coupler |
| spellingShingle | Shanshan Wang Hongjuan Yang Yipeng Liao Xin Wang Jing Wang High-Sensitivity Salinity and Temperature Sensing in Seawater Based on a Microfiber Directional Coupler IEEE Photonics Journal Directional coupler salinity sensing temperature sensing microfiber coupler |
| title | High-Sensitivity Salinity and Temperature Sensing in Seawater Based on a Microfiber Directional Coupler |
| title_full | High-Sensitivity Salinity and Temperature Sensing in Seawater Based on a Microfiber Directional Coupler |
| title_fullStr | High-Sensitivity Salinity and Temperature Sensing in Seawater Based on a Microfiber Directional Coupler |
| title_full_unstemmed | High-Sensitivity Salinity and Temperature Sensing in Seawater Based on a Microfiber Directional Coupler |
| title_short | High-Sensitivity Salinity and Temperature Sensing in Seawater Based on a Microfiber Directional Coupler |
| title_sort | high sensitivity salinity and temperature sensing in seawater based on a microfiber directional coupler |
| topic | Directional coupler salinity sensing temperature sensing microfiber coupler |
| url | https://ieeexplore.ieee.org/document/7524691/ |
| work_keys_str_mv | AT shanshanwang highsensitivitysalinityandtemperaturesensinginseawaterbasedonamicrofiberdirectionalcoupler AT hongjuanyang highsensitivitysalinityandtemperaturesensinginseawaterbasedonamicrofiberdirectionalcoupler AT yipengliao highsensitivitysalinityandtemperaturesensinginseawaterbasedonamicrofiberdirectionalcoupler AT xinwang highsensitivitysalinityandtemperaturesensinginseawaterbasedonamicrofiberdirectionalcoupler AT jingwang highsensitivitysalinityandtemperaturesensinginseawaterbasedonamicrofiberdirectionalcoupler |