期刊
IEEE PHOTONICS JOURNAL
卷 2, 期 6, 页码 942-953出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2010.2082513
关键词
Sensors; fiber optics systems
An asymmetrical fiber Mach-Zehnder interferometer (aFMZI) consisting of a fiber taper and a lateral- shifted junction is proposed and demonstrated to realize simultaneous measurement of axial strain and temperature. The interferometer exhibits different environmental sensitivities for different device architectures. If the taper and the lateralshifted junction locate spatially close (15 mm), the experimental results would indicate temperature sensitivities of 60.4 and 63.9 pm/degrees C (redshift) and axial strain sensitivities of -1.47 and -2.71 pm/mu epsilon (blueshift) at the higher and lower interference orders m(1) (49) and m(2) (48), respectively, for the taper-junction interferometer. The junction-taper interferom-eter has temperature sensitivities of 60.1 and 63.3 pm/degrees C (redshifts) and axial strain sensitivities of -1.51 and -2.75 pm/mu epsilon (blueshifts) at the interference orders m(1) and m(2), respectively.
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