Combined Long-Period Fiber Grating and Microcavity In-Line Mach–Zehnder Interferometer for Refractive Index Measurements with Limited Cross-Sensitivity
Authors:
- Monika Janik,
- Marcin Koba,
- Krystian Bogumił Król,
- Predrag Mikulic,
- Wojtek J. Bock,
- Mateusz Jakub Śmietana
Abstract
This work discusses sensing properties of a long-period grating (LPG) and microcavity in-line Mach–Zehnder interferometer (µIMZI) when both are induced in the same single-mode optical fiber. LPGs were either etched or nanocoated with aluminum oxide (Al2O3) to increase its refractive index (RI) sensitivity up to ≈2000 and 9000 nm/RIU, respectively. The µIMZI was machined using a femtosecond laser as a cylindrical cavity (d = 60 μm) in the center of the LPG. In transmission measurements for various RI in the cavity and around the LPG we observed two effects coming from the two independently working sensors. This dual operation had no significant impact on either of the devices in terms of their functional properties, especially in a lower RI range. Moreover, due to the properties of combined sensors two major effects can be distinguished—sensitivity to the RI of the volume and sensitivity to the RI at the surface. Considering also the negligible temperature sensitivity of the µIMZI, it makes the combination of LPG and µIMZI sensors a promising approach to limit cross-sensitivity or tackle simultaneous measurements of multiple effects with high efficiency and reliability.
- Record ID
- WUTd8a29435a38b4886a1db845f74534365
- Author
- Journal series
- Sensors, ISSN 1424-8220, e-ISSN 1424-3210
- Issue year
- 2020
- Vol
- 20
- No
- 8
- Pages
- 1-13
- Publication size in sheets
- 0.60
- Article number
- 2431
- ASJC Classification
- ; ; ;
- DOI
- DOI:10.3390/s20082431 Opening in a new tab
- URL
- https://www.mdpi.com/1424-8220/20/8/2431/html Opening in a new tab
- Language
- (en) English
- License
- File
-
- File: 1
- Combined Long-Period Fiber Grating and Microcavity In-Line Mach–Zehnder Interferometer for Refractive Index Measurements with Limited Cross-Sensitivity, File WUTd8a29435a38b4886a1db845f74534365.pdf / 4 MB
- WUTd8a29435a38b4886a1db845f74534365.pdf
- publication date: 26-01-2022
- Combined Long-Period Fiber Grating and Microcavity In-Line Mach–Zehnder Interferometer for Refractive Index Measurements with Limited Cross-Sensitivity, File WUTd8a29435a38b4886a1db845f74534365.pdf / 4 MB
-
- Score (nominal)
- 100
- Score source
- journalList
- Score
- = 100.0, 16-05-2022, ArticleFromJournal
- Publication indicators
- = 8; = 1; = 4; : 2016 = 1.393; : 2018 (2 years) = 3.031 - 2018 (5 years) =3.302
- Citation count
- 9
- Uniform Resource Identifier
- https://repo.pw.edu.pl/info/article/WUTd8a29435a38b4886a1db845f74534365/
- URN
urn:pw-repo:WUTd8a29435a38b4886a1db845f74534365
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.