Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 26, Issue 22, Pages 2283-2286Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2014.2351834
Keywords
Hollow core fiber; magnetic fluid; magnetic field; contrast ratio
Funding
- National Natural Science Foundation of China [61377095, 11204212, 11274182, 11004110]
- National Key Basic Research and Development Program of China [2010CB327605]
- 863 National High Technology Program of China [2013AA014201]
- Key Natural Science Foundation Project of Tianjin [13JCZDJC26100]
- China Post-Doctoral Science Foundation [2012M520024]
- Fundamental Research Funds for the Central Universities
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An inline optical fiber magnetic field sensor based on hollow core fiber (HCF) wall integrated with magnetic fluid tuned by magnetic field was proposed by sandwiching a length of HCF between two single mode fibers with offset joints. Intermodal interference is present in the HCF wall, mode propagation, as well as mode field distribution within the HCF wall have been simulated, and the contrast ratio of the interference fringes in response to the variation of the applied magnetic field has been theoretically analyzed and experimentally observed. The maximum sensing sensitivity of -0.02173 dB/Oe within the linear magnetic intensity range from 150 to 300 Oe has been achieved.
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