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17 February 2017 Intensity-modulated lateral microdisplacement sensor enabled by cleaved tapered fiber tips
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A lateral microdisplacement sensor based on tapered fiber tips, which is suitable for measuring lateral displacement with high sensitivity, is proposed. A jacket-off single-mode fiber (SMF) is tapered down to tens of microns and then cleaved in the middle of the waist region to get two identical tapered fiber tips. The lateral microdisplacement can be measured by monitoring the transmission intensity of a tip-tip structure. The beam propagation characteristics of such tapered fiber tips with different waist diameters are analyzed in detail. The tip-tip structure, together with the structure composed by one tip and one cleaved SMF, is investigated both experimentally and numerically. Experimental and numerical results show that this kind of lateral microdisplacement sensing structure can provide remarkable performance. A sensitivity of about 1.0  dB/μm with a measuring range of 28  μm is obtained experimentally.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2016/$25.00 © 2016 SPIE
Yan Liu, Weiwei Wang, and Yang Li "Intensity-modulated lateral microdisplacement sensor enabled by cleaved tapered fiber tips," Optical Engineering 56(2), 027107 (17 February 2017).
Received: 7 September 2016; Accepted: 20 January 2017; Published: 17 February 2017


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