Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 27, Issue 5-8, Pages 857-863Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2008.927754
Keywords
Boron-doped fiber; CO2 laser; glass structure changes; long-period fiber gratings (LPFGs); stress relaxation
Funding
- Hong Kong Special Administrative Region, China [CityU 111907]
- University of Electronic Science and Technology of China
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We investigate in detail the process of CO2-laser writing of long-period fiber gratings (LPFGs) in unannealed and annealed boron-doped fiber samples by using repeated scanning of CO2-laser pulses. We find that the writing dynamics depends strongly on the CO2-laser energy density and the annealing temperature of the fiber. Our results from analyzing the writing dynamics reveal the relative importance of various physical effects arising from glass structure changes due to different writing conditions and thus provide a better understanding of the formation and the properties of CO2-laser written LPFGs.
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