Matniyaz Turghun, Kong Fanting, Kalichevsky-Dong Monica T, Dong Liang
Opt Lett. 2020 May 15;45(10):2910-2913. doi: 10.1364/OL.392786.
There has been very little progress in the power scaling of Er/Yb fiber lasers in over a decade, reflecting the difficulties involved. Here we report, to the best of our knowledge, a new record of 302 W single-mode power from an Er/Yb fiber master oscillator power amplifier (MOPA) with a record optical efficiency of 56%, near the quantum limit. This is made possible by new fiber development from Nufern and off-resonant pumping of the Er/Yb fiber. We also show that further power scaling is no longer limited by ytterbium parasitic lasing but by fiber fuse in the Er/Yb fiber.
十多年来，铒镱光纤激光器的功率扩展进展甚微，这反映出其中存在的困难。据我们所知，在此我们报告了一种铒镱光纤主振荡功率放大器（MOPA）实现了302瓦单模功率的新纪录，其光效率达到56%的纪录，接近量子极限。这得益于Nufern公司开发的新型光纤以及铒镱光纤的非共振泵浦。我们还表明，进一步的功率扩展不再受镱寄生激光的限制，而是受铒镱光纤中的光纤熔丝限制。
