以光纤马赫曾德尔干涉仪作为光强度调制器件，通过光纤耦合器构造光电反馈回路搭建了一种新型电光混合型光学双稳装置。对光学双稳原理进行了研究分析，用图解法形象地解释了双稳工作原理，并且通过在实验中改变该器件的输入光强实现了光学双稳态，得到的光学双稳现象显著，双稳工作状态稳定。该器件有诸多重要应用，如工作在稳态区域时可用做光纤激光功率稳定器，工作在开关区域时可用作光开光、光路由器。

A new hybrid optical bistability device which comprises a fiber Mach-Zehnder interferometer and two fiber couplers is proposed. In the device, the fiber Mach-Zehnder interferometer is used as light intensity modulator and the fiber couplers are used to construct on optoelectronic feedback loop. The theory of bistability has been analyzed and illustrated. At last, the optical bistability is fulfilled by changing the input optical power in the experiment. The device can be used as a fiber laser power stabilizer when it works at the stable status and as an optical switch or optical router when it works at the switching status.