A theoretical modeling was introduced on a coextrusion process for preparing gradient-index (GI) polymer optical fibers (POFs). The effects of the mass transfer coefficient (k) between the fiber preform and the purging gas, and the interlayer number (n) on the refractive index distribution (RID) of POFs were investigated. The predicted refractive index distribution (RID) was in a satisfactory agreement with the experimental data reported in the literature. The order of An value in the studied systems was k*(∼ ∞) > k* (=5) > k* (∼0) for various interlayer numbers. As k closes to a very small or a very large value, the RID deviates significantly from the parabolic RI distribution. The order of the degree of the RI distribution close to a parabolic distribution is five-layer > four-layer > three-layer > two-layer. The result suggests that the greater the layer number in the multilayer coextrusion process, the closer the RID is to a parabolic curve. These results provide a way to monitor the RID of POFs by process design.
|Number of pages||11|
|Journal||ACS Symposium Series|
|Publication status||Published - 2001 Dec 1|
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)