Abstract
This study proposes a new hybrid Mach-Zehnder interferometric (MZI) sensor
based on two core-offset attenuators and an abrupt taper in a single-mode fiber
fabricated by a fiber-taper machine and electric arc discharge. When the distance
between the two core-offset attenuators is stretched to 4500 mm, significant
interference signals are detected with a prominent attenuation peak of ~28 dB. The
proposed MZI can be used to measure temperature due to its low refractive index (RI)
and strain cross-sensitivity. The temperature sensitivity is 34.95+(-)0.04 and
106.70+(-)0.04 pm/oC in the temperature ranges of 14-250 and 250-1000 oC,
respectively.
© 2014 Chinese Optics Letters
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