Open AccessVersatile Vibration Sensing Using a Tapered Photonic Crystal Fiber With a Featured Core
Author(s) -
Haihu Yu,
Huiru Zou,
Zhuozhao Luo,
Wenjing Gao,
Xin Jiang
Publication year - 2020
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2020.2981532
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
On the basis of intensity modulation, a vibration sensor using a tapered photonic crystal fiber (PCF) is demonstrated. The fiber is a solid-core PCF with a central air hole embedded in the core region. The addition of the air-hole initiates the core/cladding intermodal coupling, and consequently, modulates the output light intensity when the fiber is under external disturbance. The sensing unit is configured by firstly tapering the PCF down to a waist of 72.6 μm, and then splicing its two ends to a single-mode fiber (SMF) and a multi-mode fiber (MMF), respectively. The sensor is then used for measuring a variety of vibrational signals, such as single frequency (in the range of 30~10000 Hz), dual-frequency vibrations, and vibration accelerations (with linear responses from 0.5 to 10 m/s2). In addition, the sensitivity, influenced by varying the length of the sensor head, is also investigated.