High-temperature stable fiber Bragg gratings with ultrastrong cladding modes written using the phase mask technique and an infrared femtosecond laser

Bragg gratings with ultrastrong cladding modes are inscribed in a standard telecom optical fiber (i.e., SMF-28) using the phase mask technique and an infrared femtosecond laser. 1000°C-resistant fiber Bragg gratings (FBGs) whose cladding modes exceed 30 dB in transmission and spectrally span more th...

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Bibliographic Details
Published in:Optics letters 2020-01, Vol.45 (2), p.443
Main Authors: Abdukerim, Nurmemet, Grobnic, Dan, Hnatovsky, Cyril, Mihailov, Stephen J.
Format: Article
Language:English
Subjects:
Bragg gratings
Cladding
Femtosecond pulsed lasers
Fiber lasers
High temperature
Infrared lasers
Lasers
Luminous intensity
Optical fibers
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Summary:Bragg gratings with ultrastrong cladding modes are inscribed in a standard telecom optical fiber (i.e., SMF-28) using the phase mask technique and an infrared femtosecond laser. 1000°C-resistant fiber Bragg gratings (FBGs) whose cladding modes exceed 30 dB in transmission and spectrally span more than 250 nm can be produced with only a few (i.e., less than five) laser pulses, provided that the light intensity in the fiber core is kept at the level of ∼ 6 × 10 13 W / c m 2 . The use of FBGs fabricated under the above conditions for refractometry is demonstrated.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.381111