Prestressed Fiber Bragg Grating With High Temperature Stability

Author

Li, Yuhua ; Yang, Minwei ; Liao, Changrui ; Wang, Dongning ; Lu, Jian ; Lu, Peixiang

Author_Institution

Wuhan Nat. Lab. for Optoelectron., Huazhong Univ. of Sci. & Technol., Wuhan, China

Volume

29

Issue

10

fYear

2011

fDate

5/15/2011 12:00:00 AM

Firstpage

1555

Lastpage

1559

Abstract

A prestressed fiber Bragg grating with high temperature stability has been successfully fabricated by use of 800 nm femtosecond laser pulse irradiation through high-temperature annealing, followed by a rapid cooling treatment. The reflectivity and the resonant wavelength of the grating are maintained constants for more than 26 h in an isothermal measurement up to 1200°C, showing significant improvement over conventional femtosecond laser pulse induced fiber gratings. Longitudinal tension tests demonstrate that the prestressed fiber exhibits enhanced mechanical robustness compared with the residual stress relaxed fiber. This paper reveals that residual stress plays an important role and essentially provides a new solution to enhance the thermal stability of fiber gratings at elevated temperatures and offering high reliability.

Keywords

Bragg gratings; annealing; high-speed optical techniques; internal stresses; laser materials processing; optical fibre fabrication; optical fibre testing; reflectivity; thermal stability; femtosecond laser pulse irradiation; high temperature stability; high-temperature annealing; isothermal measurement; mechanical robustness; prestressed fiber Bragg grating; rapid cooling; reflectivity; residual stress relaxed fiber; resonant wavelength; thermal stability; wavelength 800 nm; Annealing; Fiber gratings; Gratings; Laser stability; Optical fibers; Thermal stability; Gratings; temperature; ultrafast processes in fibers;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2011.2136323

Filename

5741819