Small-period long-period fiber grating with improved refractive index sensitivity and dual-parameter sensing ability


We UV inscribe and characterize a long-period fiber grating with a period of 25 μm. A series of polarization-dependent dual-peak pairs can be seen in the transmission spectrum, even though only the symmetrical refractive index modification is introduced. The fabricated grating exhibits a lower temperature sensitivity compared with standard long-period gratings and an enhanced refractive index sensitivity of ∼312.5 nm?RIU averaged from 1.315 to 1.395, which is more than four-fold higher than standard long-period gratings in this range. The full width at half-maximum of the fabricated grating is only about 0.6 nm, allowing for high-resolution sensing. Moreover, the grating period is so small that the attenuation dip corresponding to a high-order Bragg resonance can also be seen, which can act as a monitor of the unwanted perturbation to realize dual-parameter sensing.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
Publication ISSN: 1539-4794
Last Modified: 27 Jun 2024 09:04
Date Deposited: 30 Jan 2017 13:30
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2017-01-15
Published Online Date: 2017-01-05
Accepted Date: 2016-12-08
Submitted Date: 2016-10-25
Authors: Shen, Fangcheng
Wang, Changle
Sun, Zhongyuan
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)
Shu, Xuewen



Version: Accepted Version

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