Journal of Radio Electronics. eISSN 1684-1719. 2024. ¹8

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DOI: https://doi.org/10.30898/1684-1719.2024.8.6

 

 

 

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

 

1Kotelnikov IRE RAS 125009,
Russia, Moscow, Mokhovaya str., 11, b.7

2Moscow Institute of Physics and Technology (National Research University)
141701, Moscow region, Dolgoprudny, Institutsky per., 9

 

The paper was received August 15, 2024.

 

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.

Key words: fiber Bragg grating, femtosecond inscription, regeneration, isothermal annealing.

Financing: The work was carried out within Kotel’nikov IRE RAS state task.

Corresponding author: Przhiialkovskii Dmitrii Vladimirovich DVPRZ@yandex.ru

 

 

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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. – ¹. 8. https://doi.org/10.30898/1684-1719.2024.8.6 (In Russian)