Fiber-Optic Strain Sensors Based on Linearly Chirped Tapered Fiber Bragg Gratings With Tailored Intrinsic Chirp
Tomasz Osuch , Konrad Markowski , Kazimierz Jędrzejewski
AbstractIn this paper, spectrally tailored tapered chirped fiber Bragg gratings (TCFBGs) are considered for use as strain sensors. Both gratings were written in fused tapered optical fiber using linearly chirped fiber Bragg gratings in co-directional and counter-directional chirp configurations. Theoretical and numerical analysis as well as experimental verification of the influence of applied strain on spectral width of both TCFBG structures were carried out. The results show that TCFBGs exhibit monotonic strain response over the wide operating range of the applied force. Compared with standard tapered FBG written using uniform phase mask, in the case of co-directionally written TCFBG with substantially larger grating chirp the monotonic operating range can be easily broadened toward the higher strain values (even above the applied force at which the optical fiber breaks). In turn, the intrinsic chirp of the counter-directionally written TCFBG can be tailored in such a way as to ensure that the monotonicity of its strain response is always satisfied when tensile force is applied. This is due to the spectral broadening of the reflected spectrum when strain increases.
|Journal series||IEEE Sensors Journal, ISSN 1530-437X|
|Publication size in sheets||9.5|
|Keywords in English||Fiber Bragg gratings (FBGs), fiber taper, chirp, strain sensor|
|project||Research on measurement, circuit and signal theory and electronic circuits and systems. Project leader: Starecki Tomasz,
, Phone: +48 22 825 37 09; 22 234 7744; +48 22 234 3657, start date 12-05-2016, end date 31-12-2017, ISE/2016/DS, Completed
|Score|| = 30.0, 27-03-2017, ArticleFromJournal|
= 30.0, 27-03-2017, ArticleFromJournal
|Publication indicators||: 2016 = 2.512 (2) - 2016=2.527 (5)|
|Citation count*||11 (2018-06-16)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.