Kim Bok Hyeon, Ahn Tae-Jung, Kim Dug Young, Lee Byeong Ha, Chung Youngjoo, Paek Un-Chul, Han Won-Taek
Department of Information and Communications, Kwangju Institute of Science and Technology, Gwangju, Korea.
Appl Opt. 2002 Jul 1;41(19):3809-15. doi: 10.1364/ao.41.003809.
The effect of CO2 laser irradiation on the refractive-index change in optical fibers is investigated by measuring the interference fringe shift formed by a long-period fiber grating pair. The refractive-index decrease on CO2 laser irradiation was due to relaxation of the residual stress, which was formed in optical fibers during the drawing process, and the refractive-index decrease was found to increase linearly with the drawing force. The effect of the CO2 laser output power on residual-stress relaxation, and fiber elongation was also studied.
通过测量由一对长周期光纤光栅形成的干涉条纹移动，研究了二氧化碳激光辐照对光纤折射率变化的影响。二氧化碳激光辐照导致的折射率降低是由于在拉丝过程中光纤内形成的残余应力的松弛，并且发现折射率降低随拉丝力呈线性增加。还研究了二氧化碳激光输出功率对残余应力松弛和光纤伸长的影响。
