Femtosecond point-by-point inscription of 3D FBG arrays in 7-core fibers with straight and twisted cores

Alexey Wolf, Kirill Bronnikov, Sergey Yakushin, Alexandr Dostovalov, Sergey Zhuravlev, Mikhail Salganskii, Olga Egorova, Sergey Semjonov, Sergey Babin

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

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.

Язык оригиналаанглийский
Название основной публикацииSeventh European Workshop on Optical Fibre Sensors
РедакторыKyriacos Kalli, Gilberto Brambilla, Sinead O'Keeffe
ИздательSPIE
Число страниц6
ISBN (электронное издание)9781510631236
DOI
СостояниеОпубликовано - 1 янв 2019
Событие7th European Workshop on Optical Fibre Sensors, EWOFS 2019 - Limassol, Кипр
Продолжительность: 1 окт 20194 окт 2019

Серия публикаций

НазваниеProceedings of SPIE - The International Society for Optical Engineering
Том11199
ISSN (печатное издание)0277-786X
ISSN (электронное издание)1996-756X

Конференция

Конференция7th European Workshop on Optical Fibre Sensors, EWOFS 2019
СтранаКипр
ГородLimassol
Период01.10.201904.10.2019

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Wolf, A., Bronnikov, K., Yakushin, S., Dostovalov, A., Zhuravlev, S., Salganskii, M., Egorova, O., Semjonov, S., & Babin, S. (2019). Femtosecond point-by-point inscription of 3D FBG arrays in 7-core fibers with straight and twisted cores. В K. Kalli, G. Brambilla, & S. O'Keeffe (Ред.), Seventh European Workshop on Optical Fibre Sensors [1119934] (Proceedings of SPIE - The International Society for Optical Engineering; Том 11199). SPIE. https://doi.org/10.1117/12.2540925