7.3 W国产单频光纤放大器

报道了一种MOPA式国产单频光纤放大器。该放大器采用连续波单频激光器作为主振荡器，采用我国自行设计和制造的大模场面积掺Yb双包层光纤作为功率放大器，在波长1064 nm处实现了最高7.3 W的连续激光输出，斜率效率为39%，光－光转换效率为26%。此外，对光谱特性及放大的自发发射的抑制也进行了探讨。

A narrow-linewidth master-oscillator fiber power amplifier system was presented, in which an ultrastable, continuous-wave, single-frequency laser was adopted as the master oscillator and a China-made Yb-doped large-mode-area fiber was used as the power amplifier medium. The system generates single-frequency radiation up to 7.3 W at 1064-nm wavelength with 39% slope efficiency and 26% optical-optical power conversion efficiency. The spectral characteristics as well as the suppression of amplified spontaneous emission were discussed in detail.