index of modulation

英 [ˈɪndeks ɒv ˌmɒdjʊˈleɪʃən]

美 [ˈɪndeks əv ˌmɑdʒəˈleɪʃən]

调制系数

This thesis firstly introduce the function, performance index and operation principle of the wireless interphone of frequency modulation.
首先介绍了调频无线对讲机的功能、性能指标和工作原理。
Via UV irradiation, the refractive index changes of the germanosilicate fibers were about 10-4. The refractive index modulation changes unlinearly with the time of UV irradiation, following with saturation.
光纤经过紫外光照射后折射率变化在10-4数量级；
Similar to the case of cubic nonlinear refractive index, the loss will make the width of the power gain spectra of modulation instability become narrower and the peak gain smaller.
和只有三阶非线性的情况类似，损耗也会使不稳定增益谱的谱宽变窄，谱峰减小；
The effect of the structural parameters of gratings, such as ambient refraction index, the radii of fiber cladding and the duty cycle of fiber grating, on the transmission spectra of LPG with the rectangular index modulation is analyzed.
还研究了外部环境折射率、包层半径、光栅占空比等光栅结构参量对矩形折射率调制的光栅传输谱的影响。
When d is 30 μ m, the refractive index change is only 80.2% of that of the LPG with rectangle index modulation.
当梯形上、下底边宽度差值的1/2为30μm时，光栅的折变量仅为相同光栅参数下矩形折射率调制光栅的80.2%。