Lu Qinhuan, Wang Yafei, Yang Qiubai, Cheng Yue, Zhang Lei, Feng Suya, Wang Meng, Wang Fan, Guo Mengting, Yu Chunlei, Hu Lili
Opt Express. 2025 Apr 21;33(8):17303-17311. doi: 10.1364/OE.558718.
We demonstrated a 972 nm single-frequency distributed Bragg reflector (DBR) Yb-doped fiber laser core-pumped by a watt-level 915 nm Nd-doped fiber laser. A 9 mm long home-fabricated highly Yb-doped silica fiber was used to build the DBR cavity. The direct output power of the 972 nm single frequency fiber laser (SFFL) could reach 42.8 mW when the launched pump power was 800 mW, corresponding to a slope efficiency of 6.1%. The measured linewidth was less than 13 kHz and the optical signal-to-noise ratio exceeded 55 dB. In addition, the laser exhibited an excellent stability, with a power fluctuation of 0.51% and without any instance of mode-hopping during a 2-hours observing. Moreover, benefiting from such a short cavity, this 972 nm SFFL could maintain a single longitudinal mode output in the temperature range of 10-50℃, enabling a wavelength tunability of 276 pm. These features make the laser an excellent seed source for 972 nm high-power, narrow linewidth fiber amplifiers with potential applications in single-photon detection and nonlinear frequency conversion.
我们展示了一种由瓦级915 nm掺钕光纤激光器芯泵浦的972 nm单频分布布拉格反射器（DBR）掺镱光纤激光器。使用一根9 mm长的自制高掺镱石英光纤构建DBR腔。当泵浦光功率为800 mW时，972 nm单频光纤激光器（SFFL）的直接输出功率可达42.8 mW，斜率效率为6.1%。测得的线宽小于13 kHz，光信噪比超过55 dB。此外，该激光器表现出优异的稳定性，在2小时的观测期间，功率波动为0.51%，且无任何跳模现象。而且，得益于如此短的腔，这种972 nm SFFL在10 - 50℃的温度范围内能够保持单纵模输出，波长调谐范围可达276 pm。这些特性使该激光器成为972 nm高功率、窄线宽光纤放大器的优良种子源，在单光子探测和非线性频率转换方面具有潜在应用。
