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Journal of Radio Electronics Online scientific journal · eISSN 1684-1719
2024, № 8 · RADIO ELECTRONICS RELATED PROBLEMS

Regeneration of fiber Bragg gratings inscribed following the point-by-point method with femtosecond laser radiation

D.V. Przhiialkovskii1, N.A. Plyuskova1,2, O.V. Butov1

1 Kotelnikov IRE RAS, Moscow, Russia
2 Moscow Institute of Physics and Technology (National Research University), Dolgoprudnyi
Full text DOI: 10.30898/1684-1719.2024.8.6 UDC 681.7.068 EDN FPRWLV

Abstract

The relevance of studies on the thermal stability of fiber Bragg gratings arises from the prospects of their applications in difficult operating conditions at elevated temperatures. One of the highest-temperature types of such structures formed in silica glass fibers are regenerated Bragg gratings. Generally, the regeneration effect is observed in gratings inscribed in molecular hydrogen-loaded fibers and/or in highly-doped germanosilicate fibers. This paper describes the first reported regeneration of gratings created via point-by-point inscription with femtosecond laser radiation in standard telecommunication fiber Corning SMF-28 without the presence of hydrogen in technological processes. The paper proposes an explanation of the possible mechanism for the formation of such regenerated structures.

  • fiber Bragg grating
  • Femtosecond inscription
  • regeneration
  • isothermal annealing
Аннотация (на русском)

Регенерация волоконных брэгговских решеток, записанных поточечным методом с помощью излучения фемтосекундного лазера

Актуальность исследований термической стойкости волоконных брэгговских решеток обусловлена перспективой их применения в сложных условиях эксплуатации при повышенных температурах. Одним из самых высокотемпературных типов таких структур, созданных в кварцевых волоконных световодах, являются регенерированные брэгговские решетки. Как правило, эффект регенерации наблюдается в решетках, записанных в волокнах, насыщенных молекулярным водородом и/или высоколегированных гермоаносиликатных световодах. В настоящей работе впервые обнаружена регенерация решеток, записанных методом поточечной записи излучением фемтосекундного лазера в стандартном телекоммуникационном волокне Corning SMF-28 без присутствия водорода в технологических процессах. В работе описывается возможный механизм формирования таких регенерируемых структур.

For citation

Przhiialkovskii D.V., Plyuskova N.A., Butov O.V. Regeneration of fiber Bragg gratings inscribed following the point-by-point method with femtosecond laser radiation // Journal of Radio Electronics. – 2024. – No. 8. https://doi.org/10.30898/1684-1719.2024.8.6

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