Drachenberg Derrek R, Messerly Michael J, Pax Paul H, Sridharan Arun, Tassano John, Dawson Jay
Lawrence Livermore National Lab, L-491, PO Box 808, Livermore, California 94551, USA.
Opt Express. 2013 May 6;21(9):11257-69. doi: 10.1364/OE.21.011257.
We propose and demonstrate amplification of a single high-order mode in an optical fiber having an elongated, ribbon-like core having an effective mode area of area of 600 µm(2) and an aspect ratio of 13:1. When operated as an amplifier, the double-clad, ytterbium doped, photonic crystal fiber produced 50% slope efficiency and a seed-limited power of 10.5 W, corresponding to a gain of 24 dB. The high order mode remained pure through 20 dB of gain without intervention or realignment.
我们提出并演示了在一种具有细长带状纤芯的光纤中对单个高阶模的放大，该纤芯的有效模面积为600 µm²，纵横比为13:1。当用作放大器时，这种双包层掺镱光子晶体光纤产生了50%的斜率效率和10.5 W的种子限制功率，对应增益为24 dB。在20 dB的增益过程中，高阶模无需干预或重新对准就能保持纯净。
