Journal
APPLIED OPTICS
Volume 54, Issue 23, Pages 7054-7061Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.54.007054
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Funding
- National Natural Science Foundation of China (NSFC) [61378008]
- Program for New Century Excellent Talents in University of China [NCET-12-0940]
- Sichuan Youth Science & Technology Foundation of China [2015JQ0032]
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Stationary power/amplitude distributions for multiple channels of the sampled fiber Bragg grating (SFBG) along the grating length are analyzed. Unlike a uniform FBG, the SFBG has multiple channels in the reflection spectrum, not a single channel. Thus, the stationary power/amplitude distributions for these multiple channels are analyzed by using two different theoretical models. In the first model, the SFBG is regarded as a set of grating sections and non-grating sections, which are alternately stacked. A step-like distribution is obtained for the corresponding power/amplitude of each channel along the grating length. While, in the second model, the SFBG is decomposed into multiple uniform ghost gratings, and a continuous distribution is obtained for each ghost grating (i.e., each channel). After a comparison, the distributions obtained in the two models are identical, and the equivalence between the two models is demonstrated. In addition, the impacts of the duty cycle on the power/amplitude distributions of multiple channels of SFBG are presented. (C) 2015 Optical Society of America
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