Open AccessThe relationship between the resonant wavelength of the long period fiber grati ng and its exposure
Author(s) -
Dongsheng Zhang,
Jiang Li,
Weigang Zhang,
Lijun Li,
Wande Fan,
Yuan Shu-Zhong,
Guiyun Kai,
Dong Xiang
Publication year - 2003
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.52.3087
Subject(s) - wavelength , long period fiber grating , fiber bragg grating , optics , grating , period (music) , materials science , duty cycle , fiber , physics , dispersion shifted fiber , optical fiber , fiber optic sensor , quantum mechanics , acoustics , power (physics) , composite material
In this paper we have derived the Bragg equation of long-period fiber gratings by using interference theory. According to the color centers model and Kramers-Kronig principle, we have studied, theoretically and experimentally, the relationship between the resonant wavelength of the grating and its exposure. The result shows that the resonant wavelength of the long-period fiber grating changes with the UV exposure in the form of the sum of two decaying exponential functions an d the rate of change is controlled by the duty ratio of the mask. The resonant w avelength of the long-period fiber grating is inversely proportional to the duty ratio of the mask.