Opt Lett. 2018 May 15;43(10):2340-2343. doi: 10.1364/OL.43.002340.
A side-pump coupler made of fluoride fibers was fabricated and tested. The tested device had a coupling efficiency of 83% and was driven with an incident pump power of up to 83.5 W, demonstrating high-power operation. Stable laser output of 15 W at a wavelength of around 2.8 μm was achieved over 1 h when using an erbium-doped double-clad fiber as the active medium. To the best of our knowledge, this is the first time a fluoride-glass-fiber-based side-pump coupler has been developed. A test with two devices demonstrated further power scalability.
研制并测试了一种氟化物光纤侧面耦合器。该测试装置的耦合效率为 83%，在 83.5 W 的入射泵浦功率下工作，展示了高功率运行能力。当使用掺铒双包层光纤作为活性介质时，可获得在 2.8 μm 左右波长处稳定的 15 W 激光输出，持续 1 小时。据我们所知，这是首次开发基于氟化物玻璃光纤的侧面耦合器。通过对两个装置的测试进一步证明了其功率可扩展性。
