A single-frequency distributed Bragg reflector (DBR) fiber laser at 1030 nm has been demonstrated using a 0.7 cm long homemade Yb:YAG crystal-derived silica fiber (YCDSF). The absorption and emission cross sections of the YCDSF are $4.93\times {10}^{-20}{\mathrm{cm}}^2$ at 980 nm and $1.1\times {10}^{-20}{\mathrm{cm}}^2$ at 1030 nm. Using this gain fiber, an over 255 mW continuous-wave lasing in the constructed laser has been obtained at single transverse and longitudinal mode operation. The slope efficiency and the pump threshold of the fiber laser were up to ∼35% and as low as 25 mW, respectively. The fiber laser also demonstrated an optical signal-to-noise ratio of 79 dB and a beam quality factor of 1.016 in two orthogonal directions. Its power fluctuation at 210.5 mW was less than 0.85% of the average power within 13 h. Moreover, the relative intensity noise and linewidth of the laser are also investigated at the different pump powers. The results indicate that the single-frequency DBR fiber laser has potential applications in high-quality seed sources and high-precision optical sensing.

中文翻译：

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基于超短掺Yb晶体的石英光纤，具有超过255 mW的高斜率效率和功率稳定性的单频光纤激光器

已经证明，使用0.7厘米长的自制Yb：YAG晶体衍生的石英光纤（YCDSF）可以在1030 nm处产生单频分布式布拉格反射器（DBR）光纤激光器。YCDSF的吸收和发射截面为$4.93\times {10}^{-20}{\mathrm{厘米}}^{\mathrm{2个}}$ 在980 nm和 $1.1\times {10}^{-20}{\mathrm{厘米}}^{\mathrm{2个}}$在1030 nm 使用这种增益光纤，在单个横向和纵向模式操作下，在构造的激光器中获得了超过255 mW的连续波激射。光纤激光器的斜率效率和泵浦阈值分别高达〜35％和低至25 mW。光纤激光器还显示出在两个正交方向上的光信噪比为79 dB，光束质量因数为1.016。它在210.5 mW时的功率波动小于13 h内平均功率的0.85％。此外，还研究了在不同泵浦功率下激光器的相对强度噪声和线宽。结果表明，单频DBR光纤激光器在高质量种子源和高精度光学传感方面具有潜在的应用前景。