期刊
OPTICS LETTERS
卷 39, 期 17, 页码 4982-4985出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.39.004982
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资金
- National Natural Science Foundation of China [11174064, 61308027, 61377090]
- Natural Science Foundation of SZU [801-00036401]
- Science & Technology Innovation Commission of Shenzhen [KQCX20120815161444632, JCYJ20130329140017262]
- Shenzhen University and Guangdong Province Pearl River Scholars
We proposed and experimentally demonstrated a twin-core fiber (TCF)-based Mach-Zehnder interferometer (MZI) to develop an ultrasensitive refractive index (RI) sensor. This fiber MZI was constructed by splicing a short section of TCF between two sections of single mode fibers. A microchannel was drilled through one core of the TCF by means of femtosecond laser micromachining to create one arm of the proposed interferometer, and the other core worked as the second arm. Such a fiber interferometer exhibits an ultrahigh RI sensitivity of -10981 nm/RIU and a low temperature cross-sensitivity of 3.96 x 10(-6) RIU/degrees C. Moreover, the ultra-compact device size and all-fiber configuration make it very suitable for highly sensitive RI sensing at precise location. (C) 2014 Optical Society of America
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