Zhou Huijuan, Sun Chongfeng, Chen Mo, Chen Wei, Meng Zhou
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, China.
Appl Opt. 2012 Oct 10;51(29):7046-51. doi: 10.1364/AO.51.007046.
A single-mode Brillouin-erbium fiber laser (BEFL) is realized using only a 5 m single-mode fiber (SMF) as Brillouin gain medium, which to our best knowledge is the shortest SMF ever used to construct a BEFL. The Brillouin pump (BP) preamplification technique is adopted using a bidirectionally amplified erbium-doped fiber amplifier inside the BEFL cavity. This BEFL presents a high optical signal-to-noise ratio (40 dB), a large output power (10 mW), and a low 980 nm pump threshold (~15 mW). Experimental results indicate that this threshold increases with the BP power. Two lower and upper BP thresholds exist for the BEFL onset and turnoff, respectively, for a fixed 980 nm pump power. Moreover, the output power of this BEFL increases linearly with the 980 nm pump power at the same slope efficiency of ~10% for various BP powers, but decreases linearly with the BP power at the same slope efficiency of ~-26% for various 980 nm pump powers.
仅使用一根5米长的单模光纤（SMF）作为布里渊增益介质实现了单模布里渊 - 铒光纤激光器（BEFL），据我们所知，这是用于构建BEFL的最短单模光纤。在BEFL腔内采用双向放大掺铒光纤放大器的布里渊泵浦（BP）预放大技术。该BEFL呈现出高光学信噪比（约40 dB）、大输出功率（约10 mW）和低980 nm泵浦阈值（约15 mW）。实验结果表明，该阈值随BP功率增加。对于固定的980 nm泵浦功率，BEFL开启和关闭分别存在两个较低和较高的BP阈值。此外，在不同BP功率下，该BEFL的输出功率以约10%的相同斜率效率随980 nm泵浦功率线性增加，但在不同980 nm泵浦功率下，以约 - 26%的相同斜率效率随BP功率线性降低。
