Direct femtosecond laser inscription of an IR fluorotellurite fiber Bragg grating.
Opt Lett
; 46(19): 4832-4835, 2021 Oct 01.
Article
en En
| MEDLINE
| ID: mdl-34598211
This study proposes a novel, to the best of our knowledge, development of fluorotellurite glass fiber Bragg gratings (FBGs). Shell-like morphology was achieved using a single femtosecond laser pulse illuminated through the fiber's polymer coating. Different FBG fabrication methods and parameters were systematically studied to optimize performance. The fluorotellurite FBG exhibited a high sensitivity to writing laser power and reflectivity saturation effect in repetitive writing. A low-insertion-loss fluorotellurite FBG with a reflectivity of over 99% and bandwidth of less than 1 nm was successfully inscribed. The flexible inscription methods can write an FBG at any wavelength in the fluorotellurite glass transparent window, and are applicable to infrared fiber lasers or sensors.
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01-internacional
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MEDLINE
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En
Revista:
Opt Lett
Año:
2021
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Article
Pais de publicación:
Estados Unidos