期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 23, 期 11, 页码 700-702出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2011.2124452
关键词
High temperature; optical fiber Fabry-Perot interferometer (FPI); photonic crystal fiber; strain measurement
资金
- Natural Science Foundation of China [60807019]
- Graduate Individual Innovation Project [CDJXS11120019]
- Program for NCET [NCET-08-0602]
We report a simple and robust all-fiber in-line Fabry-Perot interferometer (FPI) with an air bubble cavity, which is fabricated by directly splicing a multimode photonic crystal fiber (MPCF) to a conventional single-mode fiber with a commercialized fusion splicer. The air microbubble inserted between the two fibers has two smooth glass-air interfaces separated by a distance L as two reflective mirrors of the FPI. Due to the big air holes in the cladding of MPCF and its large numerical aperture, this device has higher signal-to-noise ratio and fringe contrast than that of the FPI based on hollow-core photonic crystal fiber. Experimental results show that the FPI can be used to measure strain in the range of 0 similar to 1850 mu epsilon at high temperatures of up to 750 degrees C. Therefore, such an FPI sensor may find important applications in the aeronautics or metallurgy areas.
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