Dual-parameter optical fiber sensor based on concatenated down-taper and multimode fiber

作者：Tong, Zhengrong; Luan, Panpan^*; Cao, Ye; Zhang, Weihua; Su, Jun

来源：Optics Communications, 2016, 358: 77-81.

DOI：10.1016/j.optcom.2015.09.027

• Fiber sensor
• Down-taper
• Multimode fiber
• Temperature
• Liquid level

A novel dual-parameter optical fiber sensor based on a single-mode fiber (SMF) down-taper and multimode fiber (MMF) is proposed and demonstrated. The sensor structure is formed by cascading a downtaper and MMF through a segment of SMF. The transmission spectrum exhibits response of the interference between core and different cladding modes. Two interference dips can be observed within a certain range of detection. Due to the different wavelength shifts of the selected two dips, simultaneous measurement of temperature and liquid level can be achieved. Experiment results indicate a good linear relation between he wavelength shift and external parameters (temperature and liquid level). The measured temperature sensitivities are 0.02 nm/degrees C and 0.031 nm/degrees C, and liquid level sensitivities are 0.022 nmfmm and 0.07 nmfmm, respectively. In addition, the fiber sensor has the advantages of compact size, simple fabrication and cost-effective.

• 出版日期2016-1-1
• 单位天津理工大学