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Opt Express. 2011 Jun 20;19(13):12418-26. doi: 10.1364/OE.19.012418.

Fiber-tip micro-cavity for temperature and transverse load sensing.

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  • 1Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China.


A low cost fiber-optic micro-cavity interferometric sensor is presented. The micro-cavity is fabricated at the fiber tip by splicing a silica capillary to a single mode fiber and then heating/melting the capillary to form a microsphere with an internal air cavity. Applications of the micro-cavity sensor for temperature and traverse load measurements are demonstrated. The sensor has small size and good mechanical strength, and may be used in high temperature environment.

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