Efficient and scalable side pumping scheme for short high-power optical fiber lasers and amplifiers

被引:45
作者
Polynkin, P [1 ]
Temyanko, V [1 ]
Mansuripur, M [1 ]
Peyghambarian, N [1 ]
机构
[1] Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA
关键词
amplifiers; high power; lasersi optical fiber; side pumping;
D O I
10.1109/LPT.2004.831977
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A new and simple method of pumping short high-power optical fiber lasers and amplifiers is described. In our approach, several passive coreless optical fibers are brought into direct contact alongside a single rare-earth doped active fiber which constitutes the active medium of the laser (amplifier). Pump light is delivered through the passive coreless fibers and penetrates into the active fiber via evanescent field coupling. To enhance the pump absorption in the gain medium, high-order spatial modes are excited in the pump delivery fibers, and an active fiber with high concentration of the dopant ions is used. As a demonstration of the viability of our approach, test results are reported on a 12-cm-long Er+3-Yb+3 codoped phosphate glass fiber laser. The laser output reaches 5 W using 23-W pumping into six coreless fibers. Above threshold, the laser has similar to24% optical-to-optical conversion efficiency (with similar to64% being the theoretical maximum). The linearity of the input-output characteristic for the laser suggests that the output power can be scaled up by applying higher pump power.
引用
收藏
页码:2024 / 2026
页数:3
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