Optical fiber long-period grating-based Cu2+ measurement

Saying Dong; Yunfeng Liu; Xiaoqing Tan; Yanbiao Liao; Qian Tian; Ming Luo

doi:10.1117/12.629282

5 December 2005 Optical fiber long-period grating-based Cu²⁺ measurement

Saying Dong, Yunfeng Liu, Xiaoqing Tan, Yanbiao Liao, Qian Tian, Ming Luo

Proceedings Volume 6019, Passive Components and Fiber-based Devices II; 601923 (2005) https://doi.org/10.1117/12.629282
Event: Asia-Pacific Optical Communications, 2005, Shanghai, China

Abstract

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⁺.

Citation Download Citation

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); https://doi.org/10.1117/12.629282

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