Automated technique to inscribe reproducible long-period gratings using a CO2 laser splicer
Almeida, T.
;
Oliveira, R.
;
Rocha, Ana M.
; Facão, M.
;
André, P.S
;
Nogueira, R.N.
Optics Letters Vol. 42, Nº 10, pp. 1994 - 1997, May, 2017.
ISSN (print): 0146-9592
ISSN (online): 1539-4794
Scimago Journal Ranking: 1,79 (in 2017)
Digital Object Identifier: 10.1364/OL.42.001994
Abstract
We propose a technique to inscribe long period gratings (LPGs) in standard single-mode fibers (SSMFs). The proposed method uses a commercial CO2CO2 splicer that allows for the rotation of the fiber during laser irradiation, enabling a uniform exposure around the fiber. LPGs inscribed in SSMFs with different periods are presented. Gratings can be reproduced with a maximum difference between resonant wavelength values of less than 1 nm. Furthermore, it is possible to inscribe gratings with attenuation dips of −25 dB−25 dB while at the same time obtaining polarization-dependent losses as low as 2 dB.
