期刊
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
卷 23, 期 2, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2016.2615941
关键词
Single mode-multimode-single mode fiber; multi-mode interference; refractive index sensing; side-polished fiber
资金
- National Natural Science Foundation of China [61675092, 61405075, 61177075, 61475066]
- Natural Science Foundation of Guangdong Province [2013B090600045, 2016A030313079, 2014A030313377, 2014A030310205, 2015A030306046, 2015A020213006, 2015A030313320, 2016A030311019, 2016A030310098]
This paper presents a low-cost, flexible, and highly efficient wheel polishing techniques for the fabrication of side-polished single mode-multimode-single mode fiber (SP-SMSF). The evolution of transmission spectrum of SP-SMSF is measured, simulated, and discussed. The good linear relationship between polished depth (PD) and polish-induced loss has relatively high linear correlation at 95%, allowing us to monitor and control the critical parameter PD in line and in real time. Several desirable SP-SMSF with PD = 9.6, 15, 20.6 mu m were fabricated successfully. Their characteristics of refractive index (RI) sensing are investigated experimentally. The results show that SP-SMS sensitivity increases as RI increases, approaching its maximum when the latter gets close to its core. The maximum sensitivity of the SP-SMSF with PD = 20.6 mu m is 1190 nm/RIU, comparable to that of chemically etched SMSF. The dependence of the sensitivity on the PD of SP-SMSF is also measured and discussed, showing that an increase in PD can improve the sensitivity of SP-SMSF. In addition, such novel structure of SP-SMSF will provide a flat platform to implement various fiber devices.
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