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在以掺铒光纤为增益介质的环形光纤激光器中观察到了光学双稳态现象,定性分析了双稳态形成的机理,即掺铒光纤不同位置分别存在增益饱和和吸收饱和,而且吸收饱和有着更低的饱和阈值。通过理论衍生的公式对增益特性曲线进行了拟合,并结合增益特性曲线对光双稳态的产生给出了定量的解释。
The optical bistable phenomenon was observed in the ring fiber laser with erbium doped fiber as gain medium. The mechanism of bistable formation was qualitatively analyzed. The gain saturation and absorption saturation existed in different positions of erbium doped fiber, and the absorption saturation was more Low saturation threshold. The gain characteristic curve is fitted by the formula derived from the theory and the quantitative explanation of the light bistability is given based on the gain characteristic curve.