Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
Femtosecond point-by-point inscription of 3D FBG arrays in 7-core fibers with straight and twisted cores. / Wolf, Alexey; Bronnikov, Kirill; Yakushin, Sergey et al.
Seventh European Workshop on Optical Fibre Sensors. ed. / Kyriacos Kalli; Gilberto Brambilla; Sinead O'Keeffe. SPIE, 2019. 1119934 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11199).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
}
TY - GEN
T1 - Femtosecond point-by-point inscription of 3D FBG arrays in 7-core fibers with straight and twisted cores
AU - Wolf, Alexey
AU - Bronnikov, Kirill
AU - Yakushin, Sergey
AU - Dostovalov, Alexandr
AU - Zhuravlev, Sergey
AU - Salganskii, Mikhail
AU - Egorova, Olga
AU - Semjonov, Sergey
AU - Babin, Sergey
PY - 2019/1/1
Y1 - 2019/1/1
N2 - We present the results on fabrication of 3D fiber Bragg grating (FBG) arrays in specialty 7-core optical fibers with straight or twisted (spun) cores. Femtosecond laser inscription technology allowed us to modify the fibers through the acrylate or polyimide protective coatings that significantly increases the durability of the FBG sensors as compared to conventional UV inscription approach, requiring the coating removal. Custom-made 7-core fiber with polyimide coating opens up new prospects for shape sensors operating in high-Temperature environment. Twisted-core fiber makes it possible to measure not only the shape, but also the direction of fiber torsion that is essential for a free-standing sensors. A novel method enabling core-selective FBGs inscription in a 7-core spun optical fiber is presented in this work. By using the created sensors bending radii down to several millimeters can be measured with a high precision. Separation of different core FBGs by wavelength makes it possible to combine several cores during their interrogation, which allows for sensor measurements through a single optical port.
AB - We present the results on fabrication of 3D fiber Bragg grating (FBG) arrays in specialty 7-core optical fibers with straight or twisted (spun) cores. Femtosecond laser inscription technology allowed us to modify the fibers through the acrylate or polyimide protective coatings that significantly increases the durability of the FBG sensors as compared to conventional UV inscription approach, requiring the coating removal. Custom-made 7-core fiber with polyimide coating opens up new prospects for shape sensors operating in high-Temperature environment. Twisted-core fiber makes it possible to measure not only the shape, but also the direction of fiber torsion that is essential for a free-standing sensors. A novel method enabling core-selective FBGs inscription in a 7-core spun optical fiber is presented in this work. By using the created sensors bending radii down to several millimeters can be measured with a high precision. Separation of different core FBGs by wavelength makes it possible to combine several cores during their interrogation, which allows for sensor measurements through a single optical port.
KW - multicore fiber
KW - fiber Bragg grating
KW - optical fiber sensor
KW - femtosecond laser micromachining
KW - BRAGG GRATINGS
UR - http://www.scopus.com/inward/record.url?scp=85073392583&partnerID=8YFLogxK
U2 - 10.1117/12.2540925
DO - 10.1117/12.2540925
M3 - Conference contribution
AN - SCOPUS:85073392583
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Seventh European Workshop on Optical Fibre Sensors
A2 - Kalli, Kyriacos
A2 - Brambilla, Gilberto
A2 - O'Keeffe, Sinead
PB - SPIE
T2 - 7th European Workshop on Optical Fibre Sensors, EWOFS 2019
Y2 - 1 October 2019 through 4 October 2019
ER -
ID: 21927589