Laser & Optoelectronics Progress, Volume. 60, Issue 11, 1106026(2023)
Optical Fiber Seawater Temperature and Salinity Sensor Based on Surface Plasmon Resonance
With the aim of achieving the simultaneous monitoring of changes in seawater temperature and salinity, we propose a surface plasmon resonance (SPR) sensor based on photonic crystal fibers (PCFs). The sensor probe is realized by fusing a segment of PCF between two segments of multimode fiber and plating a gold film on the surface of the PCF to stimulate the SPR phenomenon. This scheme combines the fiber optic SPR sensing probe with the temperature-sensitive material polydimethylsiloxane to form a dual SPR effect, achieving the simultaneous detection of the temperature and salinity of seawater. The experimental results show that the maximum temperature sensitivity of the sensor is-2.021 nm/℃, and the maximum salinity sensitivity is 0.418 nm/‰. This sensor has a small volume, simple production, and excellent performance. It is suitable for multi-parameter and distributed measurements of seawater and has good application prospects in liquid substance measurement.
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Ruijie Tong, Yu Wang, Bin Xing, Yong Zhao. Optical Fiber Seawater Temperature and Salinity Sensor Based on Surface Plasmon Resonance[J]. Laser & Optoelectronics Progress, 2023, 60(11): 1106026
Category: Fiber Optics and Optical Communications
Received: Feb. 28, 2023
Accepted: Apr. 28, 2023
Published Online: Jun. 5, 2023
The Author Email: Zhao Yong (zhaoyong@ise.neu.edu.cn)