Tunable superstructure fiber Bragg grating with chirp-distribution modulation based on the effect of external stress

We report an external stress modulation method for producing a superstructure fiber Bragg grating (FBG) with approximate cascaded resonant cavities composed of different index chirp distributions. The 15 mm uncoated apodized uniform-period FBG is pressed by the vertical stress from the upper 11 piec...

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Bibliographic Details
Published inOptics letters Vol. 37; no. 18; p. 3918
Main Authors Huang, Yize, Li, Yi, Zhu, Huiqun, Tong, Guoxiang, Fang, Baoying, Li, Liu, Shen, Yujian, Zheng, Qiuxin, Liang, Qian, Yan, Meng, Wang, Feng, Qin, Yuan, Ding, Jie, Wang, Xiaohua
Format Journal Article
LanguageEnglish
Published United States 15.09.2012
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Summary:We report an external stress modulation method for producing a superstructure fiber Bragg grating (FBG) with approximate cascaded resonant cavities composed of different index chirp distributions. The 15 mm uncoated apodized uniform-period FBG is pressed by the vertical stress from the upper 11 pieces of the pattern plate controlled by a piezoelectric ceramic actuator. The piece length is 1 mm, and the interval of the adjacent pieces is 0.4 mm. The reflectivity of the modulated FBG gradually shows six obvious multichannel 75%-85% reflection peaks with the increase of the vertical stress of each pattern-plate piece from 0 to 30 N. The channel spacing is steady at about 10 GHz for a C-band wavelength division multiplexing system.
ISSN:1539-4794
DOI:10.1364/OL.37.003918