29 March 2000 Fiber optic sensor system for controlling salt contents in the near-coastal shrimp farms
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Abstract
The fiber optic sensor system, that consists of 6 - 8 fiber sensor heads and can measure the salt-content in the water of near-coastal region of 1 Km2, is presented. The fiber optic sensor head was made by polishing the end of a double fiber in the form of a prism, with reflecting coating on one side, and had a dimension of 250 - 300 microns. The fiber optic sensor with lead-in power of 3 - 15 mW from visible laser diodes was tested for measuring salt content in the seawater from 0 to 4 wt.%. The results are repeatable and the accuracy less than 10-3 is suitable for controlling the salinity degree in the range of 0.5 - 1.7% in the near coastal shrimp farms, especially for the childhood shrimp fields.
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Van Hoi Pham, Van Hoi Pham, Duc Thinh Vu, Duc Thinh Vu, Huu An Phung, Huu An Phung, Cao Dzung Hoang, Cao Dzung Hoang, Huy Bui, Huy Bui, Thi Cham Tran, Thi Cham Tran, } "Fiber optic sensor system for controlling salt contents in the near-coastal shrimp farms", Proc. SPIE 3945, Laser Diodes and LEDs in Industrial, Measurement, Imaging, and Sensors Applications II; Testing, Packaging, and Reliability of Semiconductor Lasers V, (29 March 2000); doi: 10.1117/12.380533; https://doi.org/10.1117/12.380533
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