RT - Journal Article T1 - Optimization of the core location for efficiency enhancement of double-clad fiber lasers JF - opsi YR - 2015 JO - opsi VO - 21 IS - 0 UR - http://opsi.ir/article-1-520-en.html SP - 329 EP - 332 K1 - double clad fiber laser K1 - core location K1 - ray tracing method AB - This paper aims at optimizing the absorption of the pump beam by core location in double-clad fiber lasers for circular and D-shaped fibers using practical data. The results indicate that, in a fiber with circular geometry, the absorption of the pump is increased by increasing the distance of the core from the center. However, in a D-shaped fiber, the variation of pump absorption has an optimum point. Considering these variations in the D-shaped fiber, a new optimum location for the core is obtained in which the pump absorption is increased from 91% to 97%. LA eng UL http://opsi.ir/article-1-520-en.html M3 ER -