The mathematical expression of reflection modulation function is derived in this paper. The detection principles of two kinds of structures in the optic fiber colour mark sensor are presented.
文中导出了反射光调制函数的数学表达式，并介绍两种结构的光纤色标传感器的检测原理。
The principle and experimental results of phase modulation optical heterodyne detection technique for measuring reflection of optical cavity are described.
本文叙述了用位相调制光外差技术探测光学谐振腔反射特性的原理及实验结果。
Dynamic modulation of laser and laser bean, and offset to target reflection coefficient: laser bean is shaped and collimated to round and slender beam by using of the semiconductor laser.
激光器件及激光束的动态调制，目标反射系数补偿：采用半导体激光器，经过整形、准直成圆细光束。
Extinction ratio is ratio of logic "1" average optical power to logic "0" average optical power under the worst reflection and complete modulation condition.
消光比是指在最坏反射条件时，全调制条件下，逻辑“1”平均光功率与逻辑“0”平均光功率的比值。
By analysis it is shown that the maximal modulation sensitivity comes from an appropriate end reflection coefficients of OWFPM for a certain light source spectrum width.
由分析得到，对于确定的光源光谱宽度，波导端面反射率只有取合适的值，才能取得最灵敏的调制效果。
By analysis it is shown that the maximal modulation sensitivity comes from an appropriate end reflection coefficients of OWFPM for a certain light source spectrum width.
由分析得到，对于确定的光源光谱宽度，波导端面反射率只有取合适的值，才能取得最灵敏的调制效果。
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