We demonstrate a 1030 nm single-frequency distributed feedback (DFB) fiber laser based on a 50 mm long fiber Bragg grating, inscribed in a Yb-doped glass fiber. Both of dual-polarization and single-polarization single-frequency is achieved by twisting the DFB fiber. The measured maximum output power is 154 mW for dual-polarization and 92 mW for single-polarization operation, and the slope efficiency shows an increasing trend, reaching 30% and 22% respectively. Moreover, the spectrum at the highest power shows an excellent optical signal to noise ratio of about 75 dB. These results, to the best of our knowledge, show the highest output power and highest efficiency among the reports that achieve single-frequency 1030 nm DFB laser output in either dual-polarization or single-polarization.

我们展示了基于 50 毫米长光纤布拉格光栅的 1030 nm 单频分布式反馈 (DFB) 光纤激光器，刻在掺镱玻璃纤维中。双极化和单极化单频都是通过扭绞DFB光纤来实现的。测得的双极化最大输出功率为154 mW，单极化操作为92 mW，斜率效率呈上升趋势，分别达到30%和22%。此外，最高功率的频谱显示出约 75 dB 的出色光信噪比。据我们所知，这些结果显示了在双偏振或单偏振下实现单频 1030 nm DFB 激光输出的报告中最高的输出功率和最高的效率。