研制了输出功率达17.3 W的单频保偏掺镱光纤放大器,并对其输出激光特性进行了实验研究。该光纤放大系统以Nd:罽VO4单频固态激光器为种子源,以保偏光纤为增益介质,通过二级光纤放大,获得了波长为1064 nm的单频线偏振激光输出,输出激光功率达17.3 W。功率放大级光纤放大器的斜率效率为62.8%,光光转换效率为57.6%,偏振消光比为24.3 dB。

We report on a single-frequency polarization maintaining (PM) ytterbium-doped fiber (YDF) amplifier by using a single-frequency Nd:罽VO4 oscillator seed source and a large-mode-area panda polarization maintaining fiber. The system generates single-frequency radiation up to 17.3 W at 1064 nm wavelength with 62.8% slope efficiency,57.6% optical-optical power conversion efficiency and the polarization extinction ratio is better than 24.3 dB. The spectral characteristic,output power characteristic and polarization characteristic of the single-frequency PM YDF amplifier are discussed in detail.