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5 December 2005 Optical fiber long-period grating-based Cu2+ measurement
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Proceedings Volume 6019, Passive Components and Fiber-based Devices II; 601923 (2005)
Event: Asia-Pacific Optical Communications, 2005, Shanghai, China
The detection of the change of concentration of cupric ions (Cu2+) by long-period grating (LPG) sensors was presented in this paper. A polymeric affinity coating was chemically attached to the surface of the LPG sensor with reaction times of 4 hours, 8 hours, and 12 hours, which is characterized of its surface appearance by scanning electronic microscope (SEM). By comparing the surface appearance of the polymeric affinity coating, a proper reaction time was chosen as the final experimental condition. The optimal experimental condition was applied to the LPG sensor, which was first dipped into cupric sulfate (CuSO4) solutions of different concentrations and then ethylene diamine tetraacetic acid (EDTA) solution. The intensity changes of typical transmission spectrum with Cu2+ concentrations were studied. Results showed that the intensity-based method of LPG sensor can reflect the change of the output light power and can be used to indicate the concentration of Cu2+.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Saying Dong, Yunfeng Liu, Xiaoqing Tan, Yanbiao Liao, Qian Tian, and Ming Luo "Optical fiber long-period grating-based Cu2+ measurement", Proc. SPIE 6019, Passive Components and Fiber-based Devices II, 601923 (5 December 2005);

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