单纵模相移DFB掺Yb³⁺光纤激光器运行特性的研究

对我们所制作的λ/4相移DFB掺Yb3+光纤激光器的运行特性进行了研究。研究表明：光纤端面菲涅尔反射会破坏激光器的单纵模运行,因此为获得稳定的羊纵模运行须使用隔离器或甘油清除光纤端面菲涅尔反射；机械扰动则会使沿光纤传输的单偏振激光的偏振面发生变化；温度的涨落则会引起激光输出功率的不稳定涨落。所研制à/4相移DFB单纵模、单偏振激光器具有如下特性：阈值为38mW,当泵浦功率为140 mW时,获得了25mW的1053 nm单 纵模、羊偏振激光.偏振消光比约30 dB,单纵模激光功率涨落小于2%,边模抑制比约6

The running characteristics of the single longitudinal mode, single polarization λ/4 phase-shift DFB Yb3+ -doped fiber CW lasers were researched. The fiber laser have the following excellent-characteristics: Output power of 25 mW, fluctuation of less than 2%, 100% single longitudinal mode, 30 dB polarization extinction ratio, 60 dB signal-to-noise. On the other hand, the effect on the fiber lasers is also researched from several factors such as temperature, mechanism perturbation and fresnel reflection of fiber end section.