采用光桥平衡技术可实现对强度调制型光纤传感器系统不稳定因素的补偿。文中给出透射式和反射式两种改进方案，对其进行了较详细地分析，提出的反射式光桥补偿结构具有简单、可靠、实用的特点。实验结果与理论分析相一致，取得较好的补偿效果。

optical bridge balancing technique is used to compensate for unstable factors of the intensity modulated optical fiber sensor systems. Both transmissive and reflective methods are given and analyzed in detail. The reflective optical bridge balancing method is simple, reliable and practical. The experiment results shows its consistent with the theoretical analyses and better compensation effect is obtained.