Details
| Original language | English |
|---|---|
| Journal | IEEE photonics journal |
| Volume | 13 |
| Issue number | 5 |
| Publication status | Published - 9 Sept 2021 |
Abstract
We report on a novel bend sensor with high flexibility and elasticity based on Bragg grating structures in polymer optical fibers to detect bending for the measurement of movement. The concept is very simple and relies on the inscription of eccentrical Bragg gratings into multimode graded-index polymer optical fibers via contact exposure with a krypton fluoride excimer laser in the ultraviolet region and an optimized phase mask. Depending on the fiber deformation, the lattice constant of the inscribed Bragg grating is strained or compressed due to its position relative to the fiber core. This in turn results in a specific shift of the Bragg wavelength of up to 1.3 nm to the red or blue wavelength region, respectively, which is sufficiently large to be reliably detected. Therefore, as proof of principle, deformation along one axis can be observed with a single Bragg grating with a maximum sensitivity of up to 65 pm/m-1. Moreover, multiple Bragg gratings inscribed into the same polymer optical fiber at different positions around the fiber axis allow to determine the shape deformation of the fiber relative to a reference frame with similar accuracy. Consequently, this technology could form the basis for new applications in the areas of medical diagnostics, robotics or augmented reality, which are lacking affordable sensor systems to date.
Keywords
- Fiber Bragg gratings, fiber optics, optical bend sensor, polymer optical fiber, UV excimer laser
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Engineering(all)
- Electrical and Electronic Engineering
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In: IEEE photonics journal, Vol. 13, No. 5, 09.09.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Optical Bend Sensor Based on Eccentrically Micro-Structured Multimode Polymer Optical Fibers
AU - Leffers, Lennart
AU - Locmelis, Julia
AU - Bremer, Kort
AU - Roth, Bernhard
AU - Overmeyer, Ludger
N1 - Funding Information: This work was supported in part by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation (OV 36/43-1)). The work of Kort Bremer, Bernhard Roth and Ludger Overmeyer was supported in part by theDeutsche Forschungsgemeinschaft (DFG, GermanResearch Foundation) under Germany's Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453).
PY - 2021/9/9
Y1 - 2021/9/9
N2 - We report on a novel bend sensor with high flexibility and elasticity based on Bragg grating structures in polymer optical fibers to detect bending for the measurement of movement. The concept is very simple and relies on the inscription of eccentrical Bragg gratings into multimode graded-index polymer optical fibers via contact exposure with a krypton fluoride excimer laser in the ultraviolet region and an optimized phase mask. Depending on the fiber deformation, the lattice constant of the inscribed Bragg grating is strained or compressed due to its position relative to the fiber core. This in turn results in a specific shift of the Bragg wavelength of up to 1.3 nm to the red or blue wavelength region, respectively, which is sufficiently large to be reliably detected. Therefore, as proof of principle, deformation along one axis can be observed with a single Bragg grating with a maximum sensitivity of up to 65 pm/m-1. Moreover, multiple Bragg gratings inscribed into the same polymer optical fiber at different positions around the fiber axis allow to determine the shape deformation of the fiber relative to a reference frame with similar accuracy. Consequently, this technology could form the basis for new applications in the areas of medical diagnostics, robotics or augmented reality, which are lacking affordable sensor systems to date.
AB - We report on a novel bend sensor with high flexibility and elasticity based on Bragg grating structures in polymer optical fibers to detect bending for the measurement of movement. The concept is very simple and relies on the inscription of eccentrical Bragg gratings into multimode graded-index polymer optical fibers via contact exposure with a krypton fluoride excimer laser in the ultraviolet region and an optimized phase mask. Depending on the fiber deformation, the lattice constant of the inscribed Bragg grating is strained or compressed due to its position relative to the fiber core. This in turn results in a specific shift of the Bragg wavelength of up to 1.3 nm to the red or blue wavelength region, respectively, which is sufficiently large to be reliably detected. Therefore, as proof of principle, deformation along one axis can be observed with a single Bragg grating with a maximum sensitivity of up to 65 pm/m-1. Moreover, multiple Bragg gratings inscribed into the same polymer optical fiber at different positions around the fiber axis allow to determine the shape deformation of the fiber relative to a reference frame with similar accuracy. Consequently, this technology could form the basis for new applications in the areas of medical diagnostics, robotics or augmented reality, which are lacking affordable sensor systems to date.
KW - Fiber Bragg gratings
KW - fiber optics
KW - optical bend sensor
KW - polymer optical fiber
KW - UV excimer laser
UR - http://www.scopus.com/inward/record.url?scp=85114718589&partnerID=8YFLogxK
U2 - 10.1109/JPHOT.2021.3111298
DO - 10.1109/JPHOT.2021.3111298
M3 - Article
AN - SCOPUS:85114718589
VL - 13
JO - IEEE photonics journal
JF - IEEE photonics journal
SN - 1943-0655
IS - 5
ER -