A Micro Bubble Structure Based Fabry-Perot Optical Fiber Strain Sensor with High Sensitivity and Low-Cost Characteristics

作者：Yan, Lu; Gui, Zhiguo; Wang, Guanjun^*; An, Yongquan^*; Gu, Jinyu; Zhang, Meiqin; Liu, Xinglin; Wang, Zhibin; Wang, Gao; Jia, Pinggang

来源：Sensors (Switzerland), 2017, 17(3): 555.

DOI：10.3390/s17030555

• optical fiber sensor
• Fabry-Perot
• strain measurement

A high-sensitivity, low-cost, ultrathin, hollow fiber micro bubble structure was proposed; such a bubble can be used to develop a high-sensitivity strain sensor based on a Fabry-Perot interferometer (FPI). The micro bubble is fabricated at the fiber tip by splicing a glass tube to a single mode fiber (SMF) and then the glass tube is filled with gas in order to expand and form a micro bubble. The sensitivity of the strain sensor with a cavity length of about 155 m and a bubble wall thickness of about 6 m was measured to be up to 8.14 pm/epsilon.

• 出版日期2017-3
• 单位中北大学